Question

Y = 3 + 1/5x y = -7x-9 y = 11 - 3x

Answer 1

Answer:

1. x = 15

2. x = - 9/7

3. x = 11/3

Step-by-step explanation:

Part one, y = 3+1/5x

to find x-intercept/zero, substitute y= 0

0 = 3 + 1/5

multiple both sides of the equation by five.

0 = 15 + x

move the variable to the left.

-x=15

change the signs on both of the equations.

x = -15

your solution is x = -15.

Part two, y = -7x -9

Move variable to the left hand side and change its sign.

7x = -9

Divide both sides of the equation by 7.

x=-9/7

Solution is x = - 9/7

Part three, y= 11 -3x

to find x intercept y and substitute for zero.

0= 11 - 3x

move variable to the left hand side and change its sign.

3x= 11

divide both sides by 3.

x= 11/3

Solution is x = 11/3