Hi there!
We can use the following equation:
z = amount of standard deviations away a value is from the mean (z-score)
σ = standard deviation
x = value
μ = mean
Plug in the knowns for both and rearrange to solve for the mean:
Other given:
Set both equal to each other and solve:
Answer:
r = 12.89
Step-by-step explanation:
18(2) + 15(3) = 81 = C
C = 2πr
81 = 2πr
81/2 = πr
r = 81/2π ≈ 12.89
51
x 73
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153
+3570
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3,723 Your answer is: 3,723
Answer:
c fo criiiip
Step-by-step explanation:
Answer:
C. none of the above
Step-by-step explanation:
A. x - (- x) is <em>the equivalent of x + x</em>, because subtracting a negative number is the same as adding it's positive counterpart. Therefore, <em>it will be 2x, not -x</em>.
B. Same thing. But this time, 0 - (- x) is the same as 0 + x, which is x, not -x.
Because <em>neither are right</em>, the only answer is C.
