Answer:
I think it didnt change
Step-by-step explanation:
Cause both areas from the line are the same and if it were to change the left would be diffrent from the right. So there i think it didnt change.
Jay and Kevin are shoveling the snow off a driveway. Working together, they can clear the driveway of snow in 14 minutes. Working alone, itwould take Kevin 21 minutes longer to clear the driveway of snow than it would take Jay working alone. When j is the number of minutes it wouldtake Jay to clear the driveway of snow when working alone, the situation is modeled by this rational equation:How long would it take jay to clear the driveway of snow working alone?
The Solution:
The correct answer is j = 21 [option B]
Given:
\(\frac{1}{j}+\frac{1}{j+21}=\frac{1}{14}\)We are required to solve for j.
\(\begin{gathered} \frac{1}{j}+\frac{1}{j+21}=\frac{1}{14} \\ \\ \frac{j+21+j}{j(j+21)}=\frac{1}{14} \end{gathered}\)\(\frac{2j+21}{j(j+21)}=\frac{1}{14}\)Cross multiply:
\(\begin{gathered} j(j+21)=14(2j+21) \\ j^2+21j=28j+294 \\ j^2+21j-28j-294=0 \end{gathered}\)\(undefined\)Answer:
see photo #12
Step-by-step explanation:
NEED HELP ASAP GIVING A TON OF POINTS
Han and Priya want to know the mean height of the 30 students in their dance class. They each select a random sample of 5 students.
The mean height for Han's sample is 59 inches.
The mean height for Priya's sample is 61 inches.
Does it surprise you that the two sample means are different?
The difference in the mean heights of Han and Priya's samples do not surpise me.
What are samples?A sample is a smaller group of the population. A sample is sometimes needed as it might not be feasible to survey all the population due to large numbers. It might also not be cost effective to access the whole population.
Han and Priya would measure different students, so it is expected that the mean heights would be different.
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If f(x) = x - 4 and g (x) = 2x Find g(f (-2));
f(x) = x - 4
g(x) = 2x
We need to find g(f(-2)), which means
Find f(-2) at first by substitute x by -2 in f
f(-2) = (-2) - 4 = -2 - 4 = -6
Replace f(-2) by -6
Now we need to find g(-6)
Substitute x in g by -6
g(-6) = 2(-6) = -12
g(f(-2)) = -12
a + 1 / a = 4 Find (a+1/a)³
Pls solve this
Answer:
If a+1/a=4, then (a+1/a)^3=4^3, and 4^3=4x4x4=64
Answer:
(a + 1/a)^3 = A^3 + 13.75.
Step-by-step explanation:
To solve this problem, we first need to simplify the expression (a + 1/a)^3 using the identity (a + b)^3 = a^3 + 3a^2b + 3ab^2 + b^3.
Let's start by expanding (a + 1/a)^3:(a + 1/a)^3 = a^3 + 3a^2(1/a) + 3a(1/a)^2 + (1/a)^3
We can simplify this expression using the fact that 1/a^2 = 1/a * 1/a:
(a + 1/a)^3 = a^3 + 3a + 3/a + 1/a^3
Now, we can substitute the given equation A + 1/a = 4:
(a + 1/a)^3 = A^3 + 3A + 3(1/A) + 1/a^3
We still need to find the value of a^3 + 1/a^3. To do this, we can use the identity a^3 + b^3 = (a + b)(a^2 - ab + b^2), where a = a and b = 1/a:
a^3 + (1/a)^3 = (a + 1/a)(a^2 - a(1/a) + (1/a)^2)
a^3 + (1/a)^3 = (a + 1/a)(a^2 - 1 + 1/a^2)
But we know that A + 1/a = 4, so A^2 + 1/a^2 = (A + 1/a)^2 - 2 = 4^2 - 2 = 14. Substituting this in the previous expression gives:
a^3 + (1/a)^3 = (4)(14 - 1) = 52
Finally, substituting in the expression we derived earlier for (a + 1/a)^3 gives:
(a + 1/a)^3 = A^3 + 3A + 3(1/A) + 52
We know that A + 1/a = 4, so substituting this gives:
(a + 1/a)^3 = A^3 + 3(4) + 3(1/4) + 52 = A^3 + 13.75
Therefore, (a + 1/a)^3 = A^3 + 13.75.
pls help me solve it
Answer:
it's the first one 3m
the height is always the straight line going through the parallelogram
Find the area of the quadrilateral
coordinates:
(-2,-7) (-1,-3) (3,-1) (6,-7) (-2,-7)
please show work how you got it if you know the answer !! kinda struggling loll
Answer:
hope this helps
Step-by-step explanation:
if u know how to find the area then u can have a go
but i have put the co-ordinates on
hope it helps
plz mark as brainliest
thank you
19NBoli
:)
Salman pays a total of Rs 21,000 as school fees of his two children. The fee of the elder child is
10% more than the fee of the younger child. Find the fee of both the children separately
Answer:
Therefore, the fee of the younger child is Rs 10,000, and the fee of the elder child is Rs 11,000.
Step-by-step explanation:
Let's assume that the fee of the younger child is 'x'. Then the fee of the elder child is '1.1*x' since it is 10% more than the fee of the younger child. The total fee paid by Salman for both his children is Rs 21,000. Therefore, we can write an equation as follows:
x + 1.1*x = 21,000
Simplifying the above equation, we get:
2.1*x = 21,000
x = 10,000
Thus, the fee of the younger child is Rs 10,000, and the fee of the elder child is 10% more, which is Rs 11,000.
Therefore, the fee of the younger child is Rs 10,000, and the fee of the elder child is Rs 11,000.
Your friend surveyed 100 people who took either vitamin C, zinc, or
Echinacea supplements to prevent getting a cold. The participants
were asked if they had a cold or no cold in the last 30 days.
no cold
cold
total
vitamin C
41
zinc
12
5
17
echinacea
21
total
26
100
What ratio of people in the survey took Echinacea?
Answer:
27 : 100
Step-by-step explanation:
Given :
__________ no cold ____ cold _____ total
Vitamin C ___ 41 ________ 15 ______ 56
Zinc _______ 12 _________5 ______ 17
Echinacea __ 21 _________ 6 ______ 27
Total ______ 74 _________ 26 ____ 100
The ratio of people who took Echinacea :
Number of people who took Echinacea : total number of people in the survey
From the TOTAL column:
Number of people who took Echinacea = 27
Total Number of people in survey = 100
Hence, ratio equals :
27 : 100
If (6 ki)² = 27-36i, the value of k is
Answer: k = √27-i
Step-by-step explanation:
The prism below is made of cubes which measure of a centimeter on one side.
Which of the following represents the volume of the prism?
The volume of the prim is 24 cubic cm and each cube represents 4/3 cm³
What is volume?Volume is defined as the amount of substance that can be filled in the shape in such a way that the whole figure is complete filled with that substance. Vοlume is defined as the space οccupied within the bοundaries οf an οbject in three-dimensiοnal space. It is alsο knοwn as the capacity οf the οbject.
Here the measure the cube measure of a centimetre on one side
Length of the prim = \(1*4=4 cm\)
Breadth of the prism = \(1*2=2cm\)
Height of the prism = \(1*3=3 cm\)
So, the volume of the prism = l*b*h
Volume of the prism = \(\rm 4*3*2=24\ cm^3\)
Hence, the volume of the prism is 24 cubic cm.
There are total 18 cubes, so each cube represents= 24/18 = 4/3
Thus, each cube represents 4/3 cm³
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Name of degree and name of terms i am grade 10
Answer:
sorry this is wrong subject
Answer:
\(x^3 - 4x^2\) = Cubic degree, binomial term
\(3x^3 + 2x^2 -1\) = Cubic degree, trinomial term
2x + 5 = linear degree, binomial term
Step-by-step explanation:
\(x^3 - 4x^2\) has a cubic degree because the term with the highest exponent is raised to the third power \((x^3)\). It also has a binomial term because there are two terms in it,
\(3x^3 + 2x^2 -1\) is also a cubic degree because the term with the highest exponent is raised to the third power \((3x^3)\). It is also a trinomial term because there are three terms in it: \(3x^3 , 2x^2, and -1\).
2x + 5 is a linear degree because the terms are implicitly assumed to have an exponent of 1: \(2x^1 = 2x\), and \(5^1 = 5\). This is also a binomial term because it has two terms, 2x and 5.
The quotient of a number "x" and 4 is less than -1
Answer:
Step-by-step explanation:
x/4 < -1, or
x < -4
please please help me
the options are:
cosC= 8/17
cosC=15/8
cosC=8/15
cosC=15/17
Answer:
8/17
Step-by-step explanation:
SohCahToa
Cos = adj/hypo
Cos C = 24/51
Simplify common denominator is 3
Cos C = 8/17
What is unit squared used for in Geometry?
Answer:
area
Step-by-step explanation:
If the same pattern continues, what will be the DIFFERENCE in the number of dots in Figure 5 and Figure 6?
Answer:35
Step-by-step explanation:
Small scooters cost £80 and large scooters cost £130. A school buys few scooters for the playground for £1000. How many of the smaller and larger scooter did they buy?
Answer:
Small scooters = 6
Large scooters = 4
Step-by-step explanation:
Let S represents small scooter and L represents large scooter
The cost of a small scooter is £80
Mathematically, the cost of S number of small scooters is
80S
The cost of a large scooter is £130
Mathematically, the cost of L number of large scooters is
130L
The total amount spent on both scooters is £1000
Mathematically,
80S + 130L = 1000
So we have 2 unknowns and only 1 equation. Therefore, we have use trial and error method .
Trial and Error Method:
80S + 130L = 1000
80S = 1000 - 130L
S = (1000 - 130L)/80
Let’s suppose they bought 1 large scooter
S = (1000 - 130(1))/80
S = 10.875
Number of scooters cannot be in fraction so 1 doesn’t work
Let’s suppose they bought 2 large scooter s
S = (1000 - 130(2))/80
S = 9.25
Number of scooters cannot be in fraction so 2 doesn’t work
Let’s suppose they bought 3 large scooter s
S = (1000 - 130(3))/80
S = 7.625
Number of scooters cannot be in fraction so 3 doesn’t work
Let’s suppose they bought 4 large scooters
S = (1000 - 130(4))/80
S = 6
So that means they bought 6 small scooters and 4 large scooters.
Similarly, other combinations for scooters don’t work since they yield either fractional value or negative value which cannot be correct.
Therefore, the only possible combination of small and large scooters is
6 Small scooters
4 Large scooters
Verification:
80S + 130L = 1000
80(6) + 130(4) = 1000
480 + 520 = 1000
1000 = 1000 (satisfied)
Someone please help me, will be marked as brainliest answer !!!!!!
Round 2.189 to 2 significant figures
Thank you so much for helping !
Answer:
2.2
Step-by-step explanation:
2.189 to 2 significant figures is 2.2
Two adjacent angles are on a straight line. One angle is (5x−28)° and the other angle is 8x°. What is the degree value of the second angle?(1 point)
Responses
128 degrees
120 degrees
52 degrees
16 degrees
Answer:
128°
Step-by-step explanation:
Adjacent angles on a straight line must add up to 180°
Using the angle measures given,
(5x−28)° + 8x° = 180°
5x - 28 + 8x = 180
13x - 28 = 180
13x = 180 + 28
13x = 208
x = 208/13 = 16
Therefore second angle = 8x° = 8(16)° = 128°
What is the simplified form of the expression the quantity x squared minus 4x minus 21 end quantity divided by 4 times the quantity x minus 7 end quantity?.
The algebraic expression is (x² - 4x - 21)/4(x - 7) , we need to find the simplified value of it . Therefore , the simplified form is (x + 3)/4 .
What is simplification?
Rules are typically rewritten to achieve this simplicity. Systems for computer algebra use them in a methodical way. Associative operations, such as addition and multiplication, can be challenging. It is common practice to approach associativity by assuming that addition and multiplication can have any number of operands, such that the symbol for a + b + c is "+." (a, b, c). It follows that a + (b + c) and (a + b) + c are both condensed to "+"(a, b, c), which is shown as a + b + c.
In the question ,it is given that ,
the algebraic expression is (x² - 4x - 21)/4(x - 7) ,
we need to find the simplified value of it .
we first simplify the
numerator
that is x² - 4x - 21 ,
By using the split the
middle term method ,
we get ,
= x² - 7x 3x - 21
= x(x - 7) 3(x - 7)
= (x 3)(x - 7)
Writing the simplified numerator in the expression ,
we get ,
= (x 3)(x - 7)/4(x - 7)
cancelling out the common term (x-7) , we get
= (x 3)/4
Therefore , the simplified form is (x + 3)/4 . It is important to take into account different classes of rewriting rules. The easiest are formulas like E E 0 or sin(0) 0 that always make the expression smaller.
Complete question
What is the simplified form of the expression
(x² - 4x - 21)/4(x - 7) ?
(a) (x+3)/4
(b) (x-3)/4
(c) (x+3)/(x-7)
(d) (x-3)/(x-7)
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4. Write an expression that shows three-fourths of v subtracted from 6 times two-ninths y
HELPPPP FASTTT
Step-by-step explanation:
8
What is the equation of a line that is parallel to y=2/3x-7 and passes through (12,2)?
Group of answer choices
A. y=2/3x-6
B. y=2/3x+12
C. y=2/3x-7
D. y=-3/2x+12
Answer:
The answer is option AStep-by-step explanation:
Equation of a line is y = mx + c
where
m is the slope
c is the y intercept
To find the equation of the parallel line we must first find the slope of the original line
From the question the original line is
y = 2/3x - 7
Comparing with the general equation above
Slope = 2/3
Since the lines are parallel their slope are also the same
Slope of parallel line = 2/3
So the equation of the line using point
(12 , 2 ) and slope 2/3 is
\(y - 2 = \frac{2}{3} (x - 12) \\ y - 2 = \frac{2}{3} x - 8 \\ y = \frac{2}{3} x - 8 + 2\)
We have the final answer as
\(y = \frac{2}{3} x - 6 \\ \)
Hope this helps you
Consider the following LP problem. Maximize z=−2x1−x2+x3 subject to x1+x2+x3≤3x2+x3≥2x1+x3=1x1,x2,x3≥0 (i) Find the dual of this LP problem. [5] (ii) After adding a slack variable s1, subtracting an excess variable e2, and adding artificial variables a2 and a3, Row 0 of the LP problem's optimal tableau is found to be z=4x1+e2+(M−1)a2+(M+2)a3=0 Find the optimal solution to the dual of this LP problem. [3]
(i) The dual of the given LP problem can be found by following these steps:
1. For each constraint in the primal problem, create a dual variable. In this case, we have three constraints, so we'll have three dual variables: y1, y2, and y3.
2. The objective function of the dual problem will be the sum of the products of the primal variables and their corresponding dual variables. So, the dual objective function is:
Maximize w = 3y1 + 2y2 + y3.
3. For each primal variable x, create a constraint in the dual problem with the coefficient of the corresponding dual variable equal to the coefficient of x in the primal objective function. So, the dual constraints are:
y1 + 2y2 - y3 ≤ -2
y1 + y2 + y3 ≤ -1
y1, y2, y3 ≥ 0.
(ii) To find the optimal solution to the dual problem, we need to solve the optimal tableau of the dual problem. From the given information, we know that Row 0 of the optimal tableau is:
w = 4x1 + e2 + (M-1)a2 + (M+2)a3 = 0.
However, the given information does not provide any details about the values of x1, e2, a2, or a3. Therefore, without this information, we cannot determine the specific optimal solution to the dual problem.
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Please help me with this worksheet.
FREE BRAINLIEST!! ill also answer questions that you have posted if you answer these 2 questions correctly!! ((Answer both questions!))
Answer:
D and C
Step-by-step explanation:
I don't really know if my answers are even correct but I did some research on them. I don't want to waste your time --or mine.
Answer: It is D
Step-by-step explanation: It is correct
For each value of w, determine whether it is a solution to -6w+3>57.
Answer:
None really look like a solution. I mean, that's what I think, honestly.
giving crown
1) At the store, 2 pounds of beans cost $3.15, 5 pounds of rice cost $7.50, 4 pounds of cabbages cost $4.54, and 7 pounds of alfalfa cost $8.95. Which item has the lowest unit price?
(A) Beans(B) Rice(C) Cabbages(D) Alfalfa
2) Peanuts are sold at the general store in the following quantities: 2¢ for one peanut; 50 peanuts for 99¢, 100 peanuts for $1.99, and 50,000 peanuts for $1000. Which quantity has the lowest unit price?
(A) 1 peanut(B) 100 peanuts(C) 50 peanuts(D) 50,000 peanuts
3)The ratio of trees to shrubs in the garden was 7 to 13. If there were 273 shrubs in the garden, how many trees were there?
(A) 420(B) 147(C) 1911(D) 507
Answer:
3) = B
Explanation:There are 147 trees.
A shark was swimming around the ocean searching for food. The distance the shark covered what is 60 km in four hours. What speed was the shark swimming?Km/hr
The rule of the speed is
\(s=\frac{d}{t}\)d is the distance
t is the time
Since the shark was swimming for 60 km, then
d = 60 km
Since the shark took 4 hours to do that, then
t = 4 hours
Divide them to find the speed of the shark
\(\begin{gathered} s=\frac{60}{4} \\ s=15\text{ km/h} \end{gathered}\)The shark was swimming at a speed of 15 km per hour
I need help with this it’s geometry this is my 2nd time asking for help
Answer:
The measure of angle WVX is 140°.
Step-by-step explanation:
Let x be the measure of angle WVX.
\( \frac{14}{9} \pi = 2x\)
\( x = \frac{7}{9} \pi( \frac{180}{\pi}) = 140 \: degrees\)
Answer:
angle = arc length/radius
in this case, the arc length is 14/9*\(\pi\) and the radius is 2. Upon multiplying these, you get 140.
so, the answer is 140 degrees.
Graph this function: y=1x+5.
Answer
Hope it helps
Write the expression in simpliest form WILL MARK BRAINLIEST
8 ( -3x + 2)
−24x+16
Hope this helps!
Answer:
-24× + 16
Step-by-step explanation:
hope this helps :D