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Sliva [168]
3 years ago
6

In order to solve the following system of equations by subtraction, which of the following could you do before subtracting the e

quations so that one variable will be eliminated when you subtract them? 4x-2y=7 3x-3y=15
A.multiply the top equation by -3 and the bottom equation by 2 B.multiply the top equation by 1/3 C.multiply the top equation by 15 and the bottom equation by 7 D.multiply the top equation by 3 and the bottom equation by 4
Mathematics
1 answer:
satela [25.4K]3 years ago
8 0

A.multiply the top equation by -3 and the bottom equation by 2


 by doing that the -2y in the top equation becomes 6y

 and the -3y in the bottom equation becomes -6y

6y-6y = 0 so the Y is eliminated

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Solve the formula for the indicated variable.
Leya [2.2K]

The given expression is

T = \frac{3U}{E}

In this expression we have to solve for U.

First we have to get rid of E from the denominator, and for that, we have to multiply both sides by E, that is

TE= 3U

Now we need to get rid of 3, and for that, we have to divide both sides by 3, that is

U = \frac{TE}{3}


6 0
4 years ago
How do I answer this correctly?
snow_lady [41]
Make the denominator the same then add wholes then fractions and turn any extras into wholes then you have your answer 10 and 7/8
3 0
3 years ago
Which expression is equivalent to 5x - 5x + 3x - 3x?
Mademuasel [1]
5x - 5x + 3x - 3x = 0
****since there is one positive and one negative of both 5x and 3x everything would cancel and the equation would equal 0
7 0
3 years ago
All the cubes below have a different image on each side.
-BARSIC- [3]

Answer:

  • <u>Figure G</u>

Explanation:

The figure labeled A cannot be because the cross and the line are not oriented in  the same relative position as in X.

The figure labeled B cannot be because the line and the the image with the three lines are not oriented in the same relative position as in X.

You cannot tell about the figures labeled C because you do not see the images of the cross and the line.

The figure labeled E cannot be because the image with the three lines is not oriented in the same relative positiion with respect to the other two as in X.

You cannot tell about the figure labeled F because the image of the cross and with the three lines are not shown.

The figure labeled G is correct: you can just rotate the cube labeled X 90 degrees counterclockwise about a vertical axis that passes through the center of the cube and get the cube labeled G.

3 0
3 years ago
Al and Bill each have two bullets. They fire alternately at a glass bottle. Al has hitting probability 1/3 and Bill 1/4. What is
enot [183]
P(Al hits bottle first time) = 1/3
P(Al misses the first shot but hits on his second shot) =  
P( Al misses and bill misses and Al hits) = 2/3 * 3/4 * 1/3 = 1/6

So required probability = 1/3 + 1/6 =  1/2
8 0
4 years ago
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