Answer:
B =
A
Step-by-step explanation:
Given that B varies directly as A then the equation relating them is
B = kA ← k is the constant of variation
To find k use the condition A = 90 and B = 40, then
k =
=
= 
B =
A ← equation of variation
Answer:
1543.59
Step-by-step explanation:
See image below for equation!
PLZZZ give me brainliest!
Answer:
Because 20 has to be doubled to become 40. While 40 is twice as much as 20 so you just divide 40 by 20 to get 50%.
Explanation:
20 x 20 = 40 = 100%
40 / 20 = 50%
Answer:
9 is c
10 is b
i think the last one is a but not too sure
Step-by-step explanation: