How many solutions does the following equation have? -9(z+8)=-9z-72−9(z+8)=−9z−72

The equation has infinitely many solutions

Step-by-step explanation:

Given the equation as

-9(z+8)= -9z-72open brackets on the left hand side

-9z-72 = -9z-72collect like terms

-9z+9z=-72+72

0=0

z=0, 1, 2the solutions are endless

The equation has infinitely many solutions

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.