Answer:
A = 9π cm²
Step-by-step explanation:
Given that area (A) varies directly with r² then the equation relating them is
A = kr² ← k is the constant of variation
To find k use the condition A = 4π when r = 2 , then
4π = k × 2² = 4k ( divide both sides by 4 )
π = k
A = πr² ← equation
when r = 3 , then
A = π × 3² = 9π cm²
You need two equations to solve a two-variable equation.
Answer:
the answer is A !
Step-by-step explanation:
Each time you roll a die there is a chance out of 6 because there are 6 faces. Therefore because you rolled it 6 times
6 x 6 = 36
So it's out of 36
3 even numbers on a die
3 x 6 = 18
Your answer is:
18/36
Which can be simplified to:
1/2
Answer:
28(1 + 2t +w)
Step-by-step explanation:
28 + 56t + 28w.
Factor out a 28 from the expression.
28(1 + 2t + w)
