Help last assignment pls.

So we have the equation 13 = d ÷ 6. To find d, reverse the equation by using multiplication. (13 × 6 = d)

Multiply 13 by 6.

13 × 6 = 78

Now plug the product into the original equation to check.

78 ÷ 6 = 13

d = 78

I hope this helps!

if you need help with anything else in this category let me know :)

7

step-by-step explanation:

the answer would be 7

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.