It takes Dana 9 hours to make 12 costumes. Which proportion can be used to find h, the number of hours that it will take Dana to make 20 costumes at the same rates?

A. 9/12 = h/20
B. 9/h = 20/12
C. 9/20 = 12/h
D. 9/12 = 20/h

A. 9/12 = h/20

Step-by-step explanation:

we know that

It takes Dana 9 hours to make 12 costumes

so

using proportion

Find out  the number of hours (h) that it will take Dana to make 20 costumes at the same rates

solve for h

Multiply in cross

i have no clue at all sorry

step-by-step explanation:

answer: i'm not going to give you the answer, but some hints to work it out.

step-by-step explanation: so, if there is a straight line that means that the line angle is 180°. so we subtract the 2 angle measures provided, (15 and 38) from 180. so the answer is 180 - (38 + 15). (you have to solve the equation)