Answer:
cos -60° =
,
cos 660° = 
Step-by-step explanation:
hope it helps
direct proportion y=kx , k is constant and k does not equal to 0.
17.5=k(21)
k=5/6
when x =39
y=5/6 ×39
y=32.5
Answer:
x=64
Step-by-step explanation:
5x = 320
Divide each side by 5
5x/5 = 320/5
x=64
Answer:
3/4 or 75% are boys
Step-by-step explanation: