5x-y=-6
y=-7x+6

find y and x and show work

5x-y=-6

y=-7x+6

The second equation tells you what Y is, so replace y in the first equation with its value:

5x- (-7x+6) = -6

Remove the parenthesis:

5x + 7x +6 = -6

Simplify:

12x + 6 = -6

Add 6 to both sides:

12x = 0

Divide both sides by 12:

x = 0

Now you have x, replace x with 0 and solve for y:

5(0) -y = -6

0 - y = -6

Multiply both sides by -1:

y = 6

The solution is X = 0 and y = 6, which is written as (0,6)

5x-y=-61

y=-7x+62

substituting value of y in equation 1

5x-(-7x+6)=-6

5x+7x-6=-6

12x=0

x=0/12=0

substituting value of x in equation 1

5×0-y=-6

y=6

b. 24 mm

step-by-step explanation:

use the pythagorean theorem.

a^2 + b^2 = c^2

a^2 + 7^2 = 25^2

a^2 + 49 = 625

a^2 = 576

a = 24

answer: b. 24 mm