Stella earned a grade of 62% on her multiple choice history final that had a total of 200 problems. How many problems on the final exam did Stella get wrong?

Answer:

there are 18 milk chocolates

Answer:

Step-by-step explanation:

convert it to fraction first: 2/5 are plain and 3/5 is milk

30÷5= 6

2x6=12

3x6=18

to check wheter or not it is correct add the amount. if it gets the total, it is correct.

So, the solution to the equation is a = -5/2.

To solve the equation 3(a+4)+2(a-1)=a, we will follow these steps:

Step 1: Distribute the numbers inside the parentheses.

3(a+4) becomes 3a + 12, and 2(a-1) becomes 2a - 2.

So, the equation becomes:
3a + 12 + 2a - 2 = a.

Step 2: Combine like terms.

Combine the variables on the left side of the equation:
3a + 2a = 5a.

Combine the constants on the left side of the equation:
12 - 2 = 10.

The equation now becomes:
5a + 10 = a.

Step 3: Isolate the variable.

Subtract a from both sides of the equation to move all the variables to the left side:
5a - a + 10 = 0.

This simplifies to:
4a + 10 = 0.

Step 4: Solve for a.

Subtract 10 from both sides of the equation:
4a + 10 - 10 = 0 - 10.

This simplifies to:
4a = -10.

Divide both sides of the equation by 4:
4a/4 = -10/4.

This simplifies to:
a = -10/4, or a = -5/2.

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The y-intercept of the graph is -4 and the x-intercept is (4,-1).

A y-intercept, also known as a vertical intercept, is the location where the graph of a function or relation intersects the coordinate system's y-axis.

This is done in analytic geometry using the common convention that the horizontal axis represents the variable x and the vertical axis the variable y.

The given equation is y = x² - 3x - 4. The y-intercept is calculated by putting x= 0 in the equation and the x-intercept by putting y = 0.

y-intercept:-

y = x² - 3x - 4

y = 0 - 0 - 4

y = -4

x-intercept:-

y = x² - 3x - 4

x² - 3x - 4 = 0

x² - 4x + x - 4 = 0

x ( x - 4 ) + 1 ( x - 4 ) = 0

( x - 4 ) ( x + 1) = 0

x = 4, -1

Therefore, the y-intercept of the graph is -4 and the x-intercept is (4,-1).

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The number that should be added on both is 7.

Answer:$969

Step-by-step explanation:

All five brothers combined have $20.00 using algebraic equation.

To solve this problem, we first need to find out how much money Peter and his brothers have combined. We know that 30% of the total money is Peter's, so we can use that to find the total amount of money. If $6.00 is 30% of the total, then we can set up an equation:

0.30x = 6.00

To solve for x, we can divide both sides by 0.30:

x = 20.00

This means that the total amount of money that Peter and his brothers have combined is $20.00.

To find out how much each brother contributed, we can divide the total by the number of brothers:

20.00 / 5 = 4.00

So each brother contributed $4.00 to the purchase of the video game.

Therefore, all five brothers combined have $20.00. It is important to remember that in order to find out how much each person contributed, we need to divide the total amount by the number of people involved. In this case, since there were five brothers, we divided the total by 5 to get the individual contribution of $4.00 per brother.

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Answer:

  100°

Step-by-step explanation:

You have two supplementary angles in the ratio 7:2, and you want the measure of their positive difference.

The sum of supplementary angles is 180°. The sum of the ratio units in the ratio 7:2 is 7+2 = 9, so each ratio unit must stand for 180°/9 = 20°.

The difference in ratio units is 7 -2 = 5, so the difference in the angles will be 5·20° = 100°.

The measure of their difference is 100°.

__

Additional comment

The two angles are 7·20° = 140°, and 2·20° = 40°. The difference is 140° -40° = 100°.

Simone built 7 toy cars and 7 toy airplanes to make a total of 14 toys.

Simone could have built 7 toy cars and 7 toy airplanes to make a total of 14 toys.

To confirm this, we can add the number of toy cars and toy airplanes:

7 toy cars + 7 toy airplanes = 14 toys

Since Simone built the same number of toy cars and toy airplanes, dividing 14 by 2 would also give us the number of each type of toy:

14 toys ÷ 2 = 7 toys each (7 toy cars and 7 toy airplanes)

Therefore, we can conclude that Simone built 7 toy cars and 7 toy airplanes to make a total of 14 toys.

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Given the steps used to calculate the interquartile range, Bryan did not make any mistake.

The interquartile range is the difference between the third quartile and the first quartile.

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Answer:

The numbers needed to fill each box are in the image attached

Step-by-step explanation:

The probability of the coin landing on heads is 2/7, so the probability of it landing on tails is 1 - 2/7 = 5/7

The probability of landing heads 2 times is:

P = (2/7) * (2/7) = 4/49

The probability of landing heads and then tails is:

P = (2/7) * (5/7) = 10/49

The probability of landing tails and then heads is:

P = (5/7) * (2/7) = 10/49

The probability of landing tails 2 times is:

P = (5/7) * (5/7) = 25/49

The numbers needed to fill each box are in the image attached.

Step-by-step:

The first flip numbers will always add up to 1 so you do

1 - 2/7= 5/7

now it gets easy...

The second flip  head will be 2/7 because it is a biased dice and the second flip tail will be 5/7

This also applies for the bottom 2: 2/7 head, 5/7 tails

hope this helped :)

it A

Step-by-step explanation:

Answer:
20.02

If this help please set brainliest.

Explain:

If you increase the number 14 by 43%, you would get
14 + (14 * 43%) = 14 + 6.02 = 20.02.

Answer:

\(\frac{3}{4}\) = the slope

Step-by-step explanation:

you have a slope formula to do this problem and you need to learn how to use it.  Watch me.

\(m = \frac{y_{2 - y_{1} } }{x_{2} - x_{1} }\)

m = \(\frac{-12 - (-18)}{-2 - (-10)}\)

   = \(\frac{-12 + 18}{-2 + 10}\)

   =  \(\frac{6}{8}\)

   = \(\frac{3}{4}\)

Answer:

\(x = 52\)

Step-by-step explanation:

\(59 + 69 + x = 180\)

\(128 + x = 180\)

\(x = 180 - 128\)

\(x = 52\)

\(\\ \sf\longmapsto tan60=\dfrac{WZ}{XW}\)

\(\\ \sf\longmapsto \sqrt{3}=\dfrac{WZ}{12}\)

\(\\ \sf\longmapsto WZ=12√3\)

\(\\ \sf\longmapsto WZ=20.78\)

Now

\(\\ \sf\longmapsto XZ^2=20.78^2+12^2\)

\(\\ \sf\longmapsto XZ^2=431.8+144\)

\(\\ \sf\longmapsto XZ^2=575.8\)

\(\\ \sf\longmapsto XZ\approx 24\)

Now

\(\\ \sf\longmapsto cos\Theta=\dfrac{XW}{XZ}\)

\(\\ \sf\longmapsto cos\Theta=\dfrac{12}{24}\)

\(\\ \sf\longmapsto cos\Theta=\dfrac{1}{2}\)

Option C

The value of the cosine for the given triangle XZW will be ( 12 / 24 ). the correct option is C.

The trigonometric functions in mathematics are real functions that connect the right-angled triangle's angle to the ratios of its two side lengths. They are extensively utilized in various geosciences, including navigation, and solid mechanics.

Trigonometry is the branch of mathematics that set up a relationship between the sides and angle of the right-angle triangles.

The cosine ratio will be calculated by first calculating the perpendicular WZ.

WZ = 12 x tan60

WZ = 12 x √3

WZ = 12√3

Then calculate the hypotenuse of the triangle.

XZ² = 20.78² + 12²

XZ² = 430+ 144

XZ² = 574

XZ = 24

The cosine ratio will be calculated as:-

cosФ = Base / hypotenuse = 12 / 24.

Therefore, the value of the cosine for the given triangle XZW will be ( 12 / 24 ). the correct option is C.

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The consumers' surplus is  \(\(\frac{591000}{177}\)\) .

Given the demand function \(\(D(q) = \frac{8000}{(8q+3)^2}\)\) and the equilibrium quantity \(q = 7\), we can find the consumers' surplus by integrating the demand function from 0 to 7 and subtracting the cost at the equilibrium quantity.

The consumers' surplus represents the difference between what consumers are willing to pay for a product and what they actually pay. In this case, the demand function is given by:

\(\(D(q) = \frac{8000}{(8q+3)^2}\)\) ,

where \(q\) represents the quantity demanded.

To find the consumers' surplus, we first need to integrate the demand function from 0 to the equilibrium quantity of 7:

\(\(\text{Consumer Surplus} = \int_0^7 D(q) \, dq\)\)

Substituting the demand function into the integral, we have:

\(\(\text{Consumer Surplus} = \int_0^7 \frac{8000}{(8q+3)^2} \, dq\)\)

To evaluate the integral, we can use a substitution. Let \(u = 8q + 3\), then \(du = 8 \, dq\). The new limits of integration become \(u(0) = 3\) and \(u(7) = 59\). The integral becomes:

\(\(\text{Consumer Surplus} = \int_3^{59} \frac{1000}{u^2} \, du\)\)

Integrating and evaluating the integral, we get:

\(\(\text{Consumer Surplus} = \left[-\frac{1000}{u}\right]_3^{59} = \frac{1000}{3} - \frac{1000}{59}\)\)

Simplifying the expression, we find the consumers' surplus:

\(\(\text{Consumer Surplus} = \frac{591000}{177}\)\)

Therefore, the consumers' surplus for this particular beverage is \(\(\frac{591000}{177}\).\)

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Answer:

The answer isn't in the options anyway I'll write it. the answer is 46.

Step-by-step explanation:

According to BODMAS rule - addition should be done first so

4+36= 40 and -3 +7 = 4 so 40+4 ,= 44

then we should do subtracting so, 10-8 = 2

to conclude we should bring the equation to an end so,

44+2 = 46

HOPE THIS HELPS YOU

Answer:

\(y = -8x + 3\)

Step-by-step explanation:

When lines are parallel to one another, their slopes are the same.  But they have different y-intercepts. To explain further, slope is the angle of measure of a line from a horizontal standpoint and knowing that parallel angles must have the same angle, it can be concluded that parallel lines would have the same slope or in other words, an equal slope.

Now solving, use algebraic concepts:

11 = -8(-1) +b    (Now solve for b)

11 = 8 + b     (Subtract 8 from both sides) (Use the "Right" to "Left")

-8   -8

3 = b  (Switch terms)

b = 3

Now let's write the equation with only slope and y-intercept.

Getting the result of:

y = -8x + 3

Answer:

B

Step-by-step explanation:

Hope this helped you!!

Answer:

-r+15

Step-by-step explanation:

(a) The number of loads that can be expected to occur during a 2-year period can be found using the mean time between loads and the length of the time period. The mean number of loads that occur in a time period of length t can be found using the formula: mean number of loads = λt, where λ is the mean number of loads per unit time.

In this case, λ = 1/0.4 loads/year, so the mean number of loads that occur in a 2-year period is:

mean number of loads = λ * 2 years = 1/0.4 * 2 = 5

So, we can expect 5 loads to occur during a 2-year period.

(b) The probability that more than eight loads occur during a 2-year period can be found using the Poisson distribution. The Poisson distribution gives the probability of a specific number of events occurring in a given time period, given the average rate of events per unit time. In this case, the Poisson distribution can be used to find the probability that more than 8 loads occur in a 2-year period:

P(more than 8 loads) = 1 - P(8 or fewer loads) = 1 - (P(0) + P(1) + ... + P(8))

Where P(k) is the Poisson probability of exactly k loads occurring in a 2-year period. The Poisson probability of exactly k loads occurring can be found using the formula:

P(k) = (λt)^k * e^-λt / k!

So, substituting the values of λ = 1/0.4 and t = 2 into this formula, we can find the probability that more than 8 loads occur:

P(more than 8 loads) = 1 - (P(0) + P(1) + ... + P(8)) = 1 - (0.135 + 0.270 + 0.405 + 0.541 + 0.678 + 0.814 + 0.947 + 1.078 + 1.206) = 1 - 6.590 = -5.59

Since the probability of an event cannot be negative, this result is not meaningful. The probability that more than 8 loads occur during a 2-year period is greater than 1, which is not possible. This indicates that the assumption that the loads follow a Poisson process may not be valid.

(c) To find the time period for which the probability of no loads occurring is at most 0.2, we can solve for t in the equation:

P(0) = (λt)^0 * e^-λt / 0! = e^-λt = 0.2

Taking the natural logarithm of both sides:

-λt = ln(0.2)

And dividing both sides by -λ:

t = -ln(0.2) / λ = 3.5695 / (1/0.4) = 14.2780 years

So, the time period must be at least 14.2780 years in order for the probability of no loads occurring to be at most 0.2.

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Answer:

the answer is D

Step-by-step explanation:

no explanation

9514 1404 393

Answer:

Step-by-step explanation:

The price difference is found by subtracting Emma's price from DeShawn's price. Each price is the product of the number of square feet and the price per square foot.

The number of square feet is already given in the answer form, so you only need to fill in the per square foot prices. Those are found in the table. Both the window name and the window area give clues as to which is the right price to choose.

The expression is (4² × 33) - (3² × 27).

__

For the second fill-in, you need to actually do this arithmetic. For many calculators, you can enter this expression directly.

DeShawn paid $285 more for his window than Emma.

Thus, Shawn runs 3.6 miles per hour. Russ needs  3.57 hours to run every mile.

A unit is one of a particular object. An item's unit rate is its price for one of it. This is expressed as a ratio with a one as the denominator.

A particular kind of ratio is a unit rate ( known as a single-unit rate). One unit of one quantity will be compared to a distinct number of units of another quantity. Unit rates are frequently employed in practical contexts, such as when converting between measuring systems.

Given data:

Shawn runs - 18 miles in 5 hours.

Russ run - 25 miles in 7 hours.

Unit rate: in 1 hour.

Shawn runs - 18/5 miles = 3.6 miles per hour.

Russ run - 25 /7 = 3.57 miles per hour.

Thus, Shawn runs 3.6 miles per hour. Russ needs  3.57 hours to run every mile.

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The required white effective interest rate is 0.71% more than his nominal interest rate.

Compound interest is the interest on deposits computed on both the initial principal and the interest earned over time.

Here,

White Effective interest R,
\(R=(1+i/m)^m)-1\\R=(1+0.1362/4)^4)-1\\R =0.1433*100=\)
R = 14.33 percent

So

Difference in interest = 14.33%-13.62%
                                    =0.71%

Thus, the required white effective interest rate is 0.71% more than his nominal interest rate.

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Answer:

a

Step-by-step explanation:

edge 2021

Answer:

one solution

Step-by-step explanation:

The number of solutions is how many times the two functions intersect.

These two functions intersect one time

Answer:

C

Step-by-step explanation:

We are given these three people age below:

We define the age of Jim as any variable, because the problem doesn't give any specific age. I will define Jim's age as x.

Next, Carla is 5 years older than Jim. That means if Carla is 5 years older, her age would be x+5.

Then Tomy is 6 years older than Carla. That means the age would be 6+(x+5).

The sum of their three ages is 31 years old. That means we add all these ages and equal to 31.

\( \large{x + x + 5 + 6 + x + 5 = 31}\)

Combine like terms and solve for x.

\( \large{3x + 16 = 31} \\ \large{3x = 31 - 16} \\ \large{3x = 15} \\ \large{x = 5}\)

Then we substitute the value of x in ages to find these three people ages.

Answer