Answer:
First, third and the last.
Step-by-step explanation:
y = 2^r + 1
The variable r is an exponent
109.899098772yd
90-16=74
cos(74)=x/640
x = 1 8/9 or 17/9
Step 1: Add 7 to both sides.
Step 2: Divide both sides by 9.
20? i dont know hopefully im right