Answer:
subtraction & multiplication
Step-by-step explanation:
The first one
because if u solve it
2(x+y+1)
=2x+2y+2
which is the same as the expression. u just gotta combine like terms
Answer:
12
Step-by-step explanation:
Easy! All you have to do is divide 432 by 36.
432 / 36 = 12
So, there are 12 yards in 432 inches.
Answer:
2√(5/π) ≈ 2.523
Step-by-step explanation:
The radius can be found using the area formula:
A = πr²
20 = πr² . . . . . fill in the given value
20/π = r² . . . . . divide by π
√(20/π) = r = 2√(5/π) . . . take the square root and simplify
You can use your calculator to find a numerical value for this:
r = 2√(5/π) ≈ 2.52313
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<em>Comment on the form of the answer</em>
Radicals are often considered to be in simplest form when they do not contain fractions or square factors. Here, the "simpler" form would be ...
r = (2/π)√(5π)
involving the irrational number π in two calculations. My preference for evaluating the expression for r is to leave it as √(20/π) or 2√(5/π).