X−3y=1
x+y=9
which property allows you to write the equation −4y=−8 as the first step to solving the system of equations?
question 3 options:
division property of equality
substitution property of equality
subtraction property of equality
distributive property

hi there, i would be interested to you with your test, may you add the questions and answer options.

- : )

yx = 36

step-by-step explanation:

cos f = opposite side/ hypotenuse

cos f = yw / yx

we know cos f = 4/9 and yw =16

4/9 = 16/yx

multiply each side by yx

4/9 yx = 16/ yx * yx

4/9 yx = 16

multiply each side by 9/4

9/4 * 4/9 yx = 16 *9/4

yx = 36

2+2 obliviously is 4.