The area of this right triangle is 600 square feet, what does x have to be? * 1 point
12 ft.
5x ft.

x = 20

Step-by-step explanation:

The formula for the area of a triangle is

Area = 1/2 Base * Height

To find out what x is, plug the numbers in the formula

600 = 1/2 5x * 12

Multiply 5x by 12

600 = 1/2 60x

Multiply 1/2 by 60x

600 = 30x

Divide by 30

20 = x

To see if this is correct, plug it in again..

600 = 1/2 5(20) * 12

Simplify 5(20)

600 = 1/2 100 * 12

Multiply 12 by 100

600 = 1/2 1200

Multiply by 1/2

600  = 600

x is equal to 20

f(x) = y

f(-3) = -5

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18