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horrorfan [7]
3 years ago
12

In this system of equations, which variable would it be easiest to solve for?

Mathematics
1 answer:
aliya0001 [1]3 years ago
8 0

Answer:x=7& y= 2

Step-by-step explanation:

x+3y=13

3x+2y=25

Using elimination method

We have

3× x+3y=13......I

1×3x+2y=25....ii

3x+9y=39

3x+2y=25

7y=14

Divide through by 7

y=2

Substitute for y in equation i

x+3(2)=13

x+6=13

x=7

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The original quantity is 10 and the new quantity is 13. What is the percent change?​
Leya [2.2K]

3 is 13 more than 10, and 3 is 30% of 10, so 30% im pretty sure

6 0
3 years ago
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Which expressions are equivalent to 7x – 14? Check all that apply. 14 – 7x x – 2 –(14 – 7x) 7(x – 2) 3x – 14 4x 2x – 10 5x 4.
kondaur [170]

Linear equation are the equation which has the highest power of the unknown variable is 1.The expressions given in the  option 1, 2, and 3 are equivalent to 7x - 14.

The equations given in the problem are the linear equations.

<h3>Linear equation</h3>

Linear equation are the equation which has the highest power of the unknown variable is 1.

Given-

1) The given expression in the problem is,

f(x)=7x-14

Rewrite the equation as,

f(x)=(7x-14)

Take out the negative sign from the bracket,

f(x)=-(-7x+14)

Rewrite the equation with positive terms first.

f(x)=-(14-7x)

Hence the given equation is equivalent to the option 1.

2) The given equation,

f(x)=7x-14

On solving further take out the 7 common from the bracket,

f(x)=7(x-2)

Thus the given equation is equivalent to the option 2.

3) The given equation,

f(x)=7x-14

Split the term of <em>x,</em>

<em />f(x)=4x+3x-14<em />

Rewrite the equation,

f(x)=3x-14+4x

Hence the given equation is equivalent to the option 3.

4) The given equation,

f(x)=7x-14

Split the term of <em>x </em>and constant term,

<em />f(x)=5x+2x-10-4<em />

Rewrite the equation,

f(x)=2x-10+5x-4

Hence the given equation is not equivalent to the option 4.

Thus the expressions given in the  option 1, 2, and 3 are equivalent to 7x - 14.

Learn more about the linear equation here;

brainly.com/question/11897796

6 0
2 years ago
4. This box plot shows the number of marks earned by the boys in a class test. What was the lower quartile? 5.This box plot show
suter [353]

Answer:

4-lower- 18

5-upper-29

6- range-56

Step-by-step explanation:

If you look up a completed box plot you can tell where lower and upper quartiles are. Range is found by Max-Min

Hope I helped...!

4 0
3 years ago
Estimate the quotient. Round your answer to the nearest whole number.<br><br> 39.8 ÷ 4 ≈ ??
Tresset [83]

Answer:

10

Step-by-step explanation:

39.8/4=9.95, rounds to 10

5 0
3 years ago
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nu is designing a rectangular sandbox. the bottom is 16 square feet. which dimensions require the least amount of material for t
SCORPION-xisa [38]

Answer:

The least amount of dimensions would be using a 4ft x 4ft base.

Step-by-step explanation:

When looking to maximize area and minimize materials, a perfect square always does this. To prove the point, consider the 4 x 4 box in the answer to say a 16 x 1 box, which would have the same area.

The 4 x 4 box would have 4 sides each of 4 ft. Therefore, it would have 16 feet of sides to construct.

Meanwhile, there would be two sides on the other one that were 16 ft alone.

3 0
3 years ago
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