Answer:
8ab+12a-2b-3
Step-by-step explanation:
(4a–1)(2b+3)
Use the FOIL method:
First: 8ab
Outer: 12a
Inner: -2b
Last: -3
8ab+12a-2b-3
using the least-squares criterion, the researcher obtained the following estimated multiple regression equation: ŷ = 1,304 113x1 – 237x2 30x3
The estimated multiple regression equation is ŷ = 1,304 + 113x1 - 237x2 + 30x3.
In the estimated multiple regression equation, ŷ represents the predicted or estimated value of the dependent variable. The equation includes three independent variables: x1, x2, and x3, with respective coefficients of 113, -237, and 30.
The constant term is 1,304. The equation can be used to estimate the value of the dependent variable (ŷ) based on the values of the independent variables (x1, x2, x3).
The coefficients indicate the effect of each independent variable on the dependent variable, with positive coefficients indicating a positive relationship and negative coefficients indicating a negative relationship.
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find the probability of getting 5 face cards (king, queen, or jack) when 5 cards are drawn from a deck without replacement.
The probability of getting 5 face cards when taken without replacement is 0.00030473728.
There are 12 face cards in the deck overall.
When six cards are dealt, 12C5 equals 792.
without a replacement
P (5 face cards) = 12/5
P(5)=792 / 2598960 for five face cards.
P(5)=0.00030473728 for five face cards.
When 6 cards are picked from a deck without replacement, the likelihood of getting 6 face cards (a king, queen, or jack) is therefore 0.00030473728.
Probability is a branch of mathematics that deals with numerical descriptions of the likelihood that an event will occur or that a claim is true. The probability of an event is a number between 0 and 1, where, broadly speaking, 0 indicates the event's impossibility and 1 indicates its certainty.
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Evaluate a2 when a=3/4
Answer:
1/4
Step-by-step explanation:
answer key lang sakalam
#carry learning
given that x is a positive integer such that x ≥ 75, which of the following is the remainder when q is divided by 6?
Since the information about variable 'q' is not provided, it is not possible to determine the remainder when q is divided by 6 based on the given context.
The question states that x is a positive integer such that x ≥ 75, but it does not provide any information about the variable 'q'. Without knowledge of the value or any relationship between 'q' and 'x', we cannot determine the remainder when 'q' is divided by 6.
The remainder will depend on the specific value of 'q' and how it relates to the number 6. Therefore, without further information, it is not possible to determine the remainder when 'q' is divided by 6.
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y is directly proportional to x.
when y=30, x=6
work out an equation connecting y and x
Answer:
y = 5x
Step-by-step explanation:
Use the direct variation equation y = kx
Plug in 30 as y and 6 as x, then solve for k
y = kx
30 = k(6)
5 = k
Plug in 5 as k into y = kx
y = 5x
So, the equation relating x and y is y = 5x
Answer:
y=5x
Step-by-step explanation:
30 divide by 6 = 5 so y = 5x
Find the total propagated uncertainty and the largest source of uncertainty for: 1. P=mgh where, m=5.0±0.2 kg, g=9.8±1.9 m/s
2
,h=3.0±0.1 m 2. K=
2
1
mv
2
where, m=4.0±0.3 kg,v=8.0±0.44 m/s
The total propagated uncertainty for the equation P = mgh is calculated to be approximately 9.6 ± 1.03 N. The largest source of uncertainty in this equation arises from the uncertainty in the value of g, which contributes ±1.86 N to the total uncertainty.
To find the total propagated uncertainty for P = mgh, we need to consider the individual uncertainties of the variables m, g, and h, and then combine them using the rules of error propagation.
The equation for P = mgh involves multiplication, so we use the rule that states the fractional uncertainties add in quadrature. The fractional uncertainties for m, g, and h are calculated by dividing their respective absolute uncertainties by their measured values.
For m = 5 ± 0.2 kg, the fractional uncertainty is 0.04, and for g = 9.8 ± 1.9 m/(s^2), it is 0.194. For h = 3 ± 0.1 m, the fractional uncertainty is 0.033.
Next, we multiply these fractional uncertainties by the values of mgh to obtain the individual propagated uncertainties for each variable. Multiplying mgh by the fractional uncertainties of m, g, and h gives us ±0.2 N, ±1.91 N, and ±0.1 N, respectively. To find the total propagated uncertainty, we add these individual uncertainties in quadrature: ±√((0.2 N)^2 + (1.91 N)^2 + (0.1 N)^2) = ±1.03 N.
The largest source of uncertainty in this equation is the uncertainty in the value of g, which contributes ±1.91 N to the total propagated uncertainty. This is because the uncertainty in g has the largest fractional uncertainty among the variables involved in the equation.
Therefore, the total propagated uncertainty for P = mgh is approximately 9.6 ± 1.03 N, with the largest source of uncertainty arising from the uncertainty in g, contributing ±1.86 N to the total uncertainty.
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James started an apple orchard with the trees he already had and then planted 25 more. Now his orchard contains 44 trees. How many trees did James start out with?
What would be the coefficient of determination r2 if the total sum of squares (sst) is 90 and the sum of squares due to error (sse) is 0 (zero)?
The coefficient of determination is 1.
Given
Total Sum of squares (SST) = 90
Sum of squares due to error (SSE) = 0
We have to find coefficient of determination.
The correlation of determination is the ratio of the explained variation to the total variation.
The coefficient of determination is used to analyze how differences in one variable can be explained by a difference in a second variable.
The coefficient of determination is also called r-squared or r-square.
Its the percentage of variation in the y-variable(response) that can be explained by the least squares regression line of y on x.
Coefficient of determination can be found with the following formula:
Formula of coefficient of determination :
\(R^{2} = 1 - \frac{SSE}{SST}\)
= 1 - \(\frac{0}{90}\)
= 1 - 0
= 1
\(R^{2}\) = 1
Therefore,
The coefficient of determination is 1.
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Convert the decimal value 0.28 to a fraction
Answer:
Step-by-step explanation:
7/25 28%
0.24 6/25 24%
0.31818 7/22 31.818%
0.30435 7/23 30.435%
Answer:
7/25 (simplified) OR 28/100.
I would love these answer please
The relation 1 is not a function, while the relation 2 is a function
How to determine if each relation is a function or not?For a relation to be a function, the following must be true:
Each y value in the function must have a unique x value
i.e. Each y value must have exactly one x value
Using the above as a guide, we have
Relation 1: This relation is not a function, because the x value 5 has two y values 2 and 4
Relation 2: This relation is a function, because each y value must have exactly one x value
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10pounds of bananas for $8.50
Answer:
$8.50
Step-by-step explanation:
10 pounds of bananas
A rectangular prism has a length of 10 meters, a width of 5 meters, and a height of 2 meters.
Which equations could be used to determine the volume, V, of the prism?
Answer:
100 Meters
Step-by-step explanation:
10X5X2=100m.
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Let theta be an acute angle of a right triangle. Find the values of the other five trigonometric functions of theta.
The exact values of the remaining trigonometric functions are listed below:
Case 3: cos θ = 3 / 5, tan θ = 4 / 3, cot θ = 3 / 4, sec θ = 5 / 3, csc θ = 5 / 4
Case 4: sin θ = √11 / 6, tan θ = √11 / 5, cot θ = 5√11 / 5, sec θ = 6 / 5, csc θ = 6√11 / 11
Case 5: cos θ = 8√73 / 73, sin θ = 3√73 / 73, tan θ = 3 / 8, cot θ = 8 / 3, csc θ = √73 / 3
Case 6: sin θ = 1 / 2, cos θ = √3 / 2, tan θ = √3 / 3, sec θ = 2√3 / 3, csc θ = 2
How to find the exact values of trigonometric functions
In this problem we find four cases of trigonometric functions, whose exact values of remaining trigonometric functions must be found. The trigonometric functions are defined below:
sin θ = y / √(x² + y²)
cos θ = x / √(x² + y²)
tan θ = y / x
cot θ = x / y
sec θ = √(x² + y²) / x
csc θ = √(x² + y²) / y
Now we proceed to determine the exact values of the trigonometric functions:
Case 3: y = 4, √(x² + y²) = 5
x = √(5² - 4²)
x = 3
cos θ = 3 / 5
tan θ = 4 / 3
cot θ = 3 / 4
sec θ = 5 / 3
csc θ = 5 / 4
Case 4: x = 5, √(x² + y²) = 6
y = √(6² - 5²)
y = √11
sin θ = √11 / 6
tan θ = √11 / 5
cot θ = 5√11 / 5
sec θ = 6 / 5
csc θ = 6√11 / 11
Case 5: x = 8, √(x² + y²) = √73
y = √(73 - 8²)
y = 3
cos θ = 8√73 / 73
sin θ = 3√73 / 73
tan θ = 3 / 8
cot θ = 8 / 3
csc θ = √73 / 3
Case 6: x = √3, y = 1
sin θ = 1 / 2
cos θ = √3 / 2
tan θ = √3 / 3
sec θ = 2√3 / 3
csc θ = 2
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Which property is used below?
If 4x + 18 = 42, then 4x + 18-6 = 42-6.
The property which is used in the given expression is:
Additive property.
The additive property of equality in an equation asserts that the sides stay equal whether we add or subtract the same amount from both sides of the equation. For entire numbers as well, this property is valid.
There are two distinct identity qualities of numbers: additive identity and multiplicative identity. The original number is returned when additive identity is added to a number. Similar to this, multiplicative identity returns the original number when multiplied by any number.
Hence we get the required answer.
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What is the greatest common factor (GCF) of 15 and 6x?
The factors of 15 are
.
The factors of 6x are
.
The GCF of 15 and 6x is
.
Answer:
3
Step-by-step explanation:
Factors of 15 are 1, 3, 5, 15
Factors or 6 are 1, 2, 3, 6
HCF = 3
From the following items, which is closest in size to one mole of gas at STP?
A) A car
B) An elephant
C) A microwave
D) A marble
The item which is closest in size to one mole of gas at STP is C) A microwave
What is a mole?A mole is the quantity of matter contained in a body.
How to find which is closest in size to one mole of gas at STP?We know that at STP the volume of gas occupied by one mole of a gas at STP is 22.4 dm³.
Now, we have 4 items.
A car, An elephant, A microwave and a marbleLet us assume that each item is a cube. Also, since 22.4 dm³ is the volume of the cube, its length is
L = ∛22.4 dm³
= ∛(22.4 × 10³) cm³
= 28.2 cm
So, ithe item that is comparable to this length is the microwave.
So, the item is C. A microwave
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5. Given f(t) = u(t), g(t) = 2tu(t), and g(t) = f(t - 1)* g(t), determine q(4). 6. Given f(t) = u(-t), h(t) = tu(-t), and y(t) = f(t) *h(t), determine y(-4) and y(4). *
g(4) = 1 * g(4), which means that q(4) is equal to g(4). y(-4) = f(-4) * h(-4) = 1 * (-4) = -4. Therefore, the values of q(4), y(-4), and y(4) are determined as follows: q(4) = g(4), y(-4) = -4, and y(4) = 0.
For the first part of the problem, we are given f(t) = u(t), g(t) = 2tu(t), and g(t) = f(t - 1) * g(t). To determine q(4), we need to substitute t = 4 into the equation g(t) = f(t - 1) * g(t). This gives us g(4) = f(3) * g(4). Since f(t) = u(t), we know that f(3) = u(3) = 1 because u(t) is a unit step function that equals 1 for t ≥ 0. Therefore, we have g(4) = 1 * g(4), which means that q(4) is equal to g(4).
For the second part of the problem, we are given f(t) = u(-t), h(t) = tu(-t), and y(t) = f(t) * h(t). To determine y(-4) and y(4), we substitute t = -4 and t = 4 into the equation y(t) = f(t) * h(t). For y(-4), we have y(-4) = f(-4) * h(-4). Since f(t) = u(-t), we have f(-4) = u(4) = 1 because u(t) is a unit step function that equals 1 for t ≥ 0. Similarly, h(-4) = -4u(4) = -4. Therefore, y(-4) = f(-4) * h(-4) = 1 * (-4) = -4.
Similarly, for y(4), we have y(4) = f(4) * h(4). Since f(t) = u(-t), we have f(4) = u(-4) = 0 because u(t) is a unit step function that equals 0 for t < 0. Thus, y(4) = f(4) * h(4) = 0 * h(4) = 0.
Therefore, the values of q(4), y(-4), and y(4) are determined as follows: q(4) = g(4), y(-4) = -4, and y(4) = 0.
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What is the answer of 11
Answer:
2
Step-by-step explanation:
(1/2)(6x-2) - 3(x-1)
take the (1/2) and distribute it to the 6x and the 2
(3x-1) - 3(x-1)
next, distribute the 3 to the x and the 1
(3x-1) - (3x-3)
then you simplify
3x-3x cancels
-1 - -3 is the same as -1 +3
so you get 2
Please help me! 20 points! You don't have to graph btw!
[Inequalities Review]
Answer:
7 = n is greater than 9
9=m is less than or equal to 55
Step-by-step explanation:
Answer:
7. −2 < n < 0
8. Not sure about this one
9. m ≤ 55
10. 55 all the way to -40 on the inequalities graph
Consider a simple model to estimate the effect of personal computer ownership on college grade point average for graduating seniors at a large public university: GPA=β0+β1PC+u where PC is a binary variable indicating PC ownership. (i) Does this model uncover the ceteris parabus effect of PC ownership on GPA? Why might PC ownership be correlated with the error term? Could it be resolved by including it in the model? Is there a factor that is unobserved that could be correlated with both GPA and PC? (ii) Explain why PC is likely to be related to parents' annual income. Would parental income be a good IV for PC? Why or why not? (iii) Come up with an potential IV for PC and argue that it is exogenous and relevant. (iv) Suppose that four years ago the university provided grants to students for the purpose of buying PCs. In this, roughly half of the students received it randomly (so the students information was not used in any way to determine if they receive a grant). Explain carefully how you would construct an IV for PC using this information and argue that this IV will be exogenous and relevant in this model. Suppose you want to estimate the effect of class attendance on student performance using the simple model sperf =β0+β1 attrate +u where sperf is student performance and attrate is attendance rate. (i) Is attrate endogenous in this model? Come up with an unobserved variable that is plausibly correlated with u and attrate. (ii) Let dist be the distance from a student's living quarters to campus. Explain how dist could potentially be correlated with u. (iii) Maintain that dist is uncorrelated with u despite your answer to part (ii) i.e. it is exogenous. Now, what condition must dist satisfy in order to be a valid IV for attrate? Discuss why this condition might hold.
One reason why this condition may hold is because students who live closer to campus may be more likely to attend class since they don't have to travel as far
Part (i) Yes, this model uncovers the ceteris parabus effect of PC ownership on GPA.
There is, however, a possible correlation between PC ownership and the error term, which could be resolved by including it in the model.
There may be an unobserved factor that is correlated with both GPA and PC ownership.
It's possible that individuals who own PCs are more technologically savvy than those who don't, and that this technical proficiency is linked to higher GPAs.
Part (ii) PC is likely to be linked to parental annual income because high-income families can afford computers for their children, whereas low-income families may not.
Parental income would be a reasonable IV for PC since it is associated with the student's ability to afford a PC.
Part (iii) An potential IV for PC is the grant that students received for the purpose of purchasing a computer.
Since this grant was randomly assigned, it is exogenous and relevant.
Part (iv) In this scenario, the IV for PC would be whether or not the student received a grant to purchase a computer. This is a valid IV because the students' data was not used to determine who got the grant, and it is relevant since it is related to whether or not they owned a computer.
Part (i) Attendance rate (attrate) may be endogenous in this model, since there may be an unobserved factor that affects both attendance rate and student performance.
Part (ii) Distance from a student's living quarters to campus could be linked to the error term (u) because students who live closer to campus may have an easier time attending class and may be less susceptible to factors outside of their control that could impact their performance.
Part (iii) In order for dist to be a valid IV for attrate, it must be uncorrelated with u and must be correlated with attendance rate (attrate).
One reason why this condition may hold is that students who live closer to campus may be more likely to attend class since they don't have to travel as far.
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Three times a number increased by 20, is 14 less than the product of five and the 1095
number. Find the number.
\(3x + 20 = (5 \times 1095) - 14 \\ 3x + 20 = 5475 - 14 \\ 3x = 5461 - 20 \\ 3x = 5441 \\ x = \frac{5441}{3} \)
I need help! will mark brainliest and add bonus points. The question is own below:
The mean age of 17 golfers is 52
The mean age of 9 of the golfers is 74
what is the mean age of the 8 golfers
Answer:
27.25 Years Old
Step-by-step explanation:
Find the total age of the 17 golfers.
52(17) = 884
Find total age of the 9 golfers.
9(74) = 666
Subtract.
884 - 666 = 218
Divide by the 8 golfers.
218/8 = 27.25
solve for a=x-b
you will get thirty points ✨
Answer:
Hey there!
Solving for a:
a=x-b
Solving for x:
x=a+b
Solving for b
a+b=x
b=x-a
Let me know if this helps :)
Jamal travels 450 feet in 10 seconds on his bicycle. At this rate, how many feet can he travel in one minute?
Given:
The distance traveled in 10 seconds is 450 feet.
To find the distance traveled in 1 minute:
In 10 seconds, the distance is 450 feet.
In 20 seconds the distance will be,
\(450\times2=900\text{ fe}et\)In 30 seconds the distance will be,
\(450\times3=1350\text{ fe}et\)In 40 seconds the distance will be,
\(450\times4=1800\text{ fe}et\)In 50 seconds the distance will be,
\(450\times5=2250\text{ fe}et\)In 60 seconds the distance will be,
\(450\times6=2700\text{ fe}et\)Hence, the distance traveled in 1 minute is 2700 feet.
So, the table becomes,
Beads – 18 for $7.20
What is the cost of 27 beads?
$7.47
$8.80
$10.80
$11.15
The Patterson's bought a house for $154,500 and made a down payment of 15%. How much was the down payment
Answer:
.15 × $154,500 = $23,175 down payment
solve the following equations and identify any extraneous roots where applicable: [6 marks total] a) 4^{x+1} = 5^{3x} [3 marks] b) log2x + log2 (x+2) = 3
a) The solution of equation \(4^{x+1} = 5^{3x}\) is x = log4/(3log5 - log4).
b) The extraneous roots of equation \(\log_{2}x + \log_{2} (x+2) = 3\) is -4 and 2.
a) The first equation is \(4^{x+1} = 5^{3x}\).
Now solving the equation.
To solve the equation we take log on both side.
\(\log(4^{x+1}) = \log(5^{3x})\)
Using the formula \(\log m^n = n\log m\).
Now the equation is
(x+1) log4 = 3x log5
x log4 + log4 = 3x log5
Subtract x log4 on both side, we get
3x log5 - x log4 = log4
Taking common x
x(3log5 - log4) = log4
Divide by (3log5 - log4) on both side, we get
x = log4/(3log5 - log4)
b) The second equation is \(\log_{2}x + \log_{2} (x+2) = 3\)
Now solving the equation.
We can write the equation as
\(\log_{2}(x(x+2)) = 3\)
Now eliminating the log
x(x+2) = (2)^3
x(x+2) = 8
Now simplify the bracket
x^2 + 2x = 8
Subtract 8 on both side, we get
x^2 + 2x - 8 = 0
Now factor the equation
x^2 + (4-2)x - 8 = 0
x^2 + 4x - 2x - 8 = 0
x(x + 4) -2(x + 4) = 0
Now the factor of the equation is
(x + 4)(x - 2) = 0
Now equating the factor equal to zero.
x + 4 = 0 x - 2 = 0
x = -4 x = 2
Now the solution of equation is -4 and 2.
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In scientific notation, 76 000 = 7.6x 10".
n =
Answer:
4 :)
Step-by-step explanation:
I need help asap.
If the area of the rectangular base of Julian's tank is approximately 300 square inches, what is the approximate area of the rectangular base of his friend's tank?
302.5 square inches
468.75 square inches
750 square inches
375 square inches
The area of the rectangular base of his friend's tank is 468.75 square inches. So, Option D is correct.
What is the area of the rectangle?The area of the rectangle is the product of the length and width of a given rectangle.
The area of the rectangle = length × Width
One of Julian's friends also has a rectangular aquarium.
The dimensions of his friend's tank are each exactly 1 1/4 times the dimensions of Julian's tank.
Let x be the length of Julian's tank.
Let y be the width of Julian's tank.
So, the Area of Julian's tank = length × Width
= xy
Since we are given
300 = xy
Now we are given that the dimensions of his friend's tank are each exactly times the dimensions of Julian's tank.
So, the length of his friend's tank = 5/4 x
So, the width of his friend's tank = 5/4 y
So, Area of his friend's tank = ( 5/4 x) (5/4 y)
= 25 / 16 xy
= 25 / 16 (300)
= 468.75
Hence the area of the rectangular base of his friend's tank is 468.75 square inches.
So, Option D is correct.
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40% of Damien‘s marbles are blue. Damien has three marbles how many of the marbles are not blue
40% of Damien’s marbles are 6/5 or 1.2.
What is a percentage?A ratio or value that may be stated as a fraction of 100 is called a percentage. And it is represented by the symbol '%'.
Given:
Damien has three marbles.
40% of Damien’s marbles are blue.
That means,
40% of 3 blue marbles.
So, using the percentage formula,
40% of 3,
= 40 x 3/100
= 120/100
= 12/10
= 6/5
= 1.2
Therefore, 1.2 marbles are blue.
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