Hello from MrBillDoesMath!
Answer:
r = C/6.28
Discussion:
Note that C = 2 * Pi * r is the exact formula. As Pi is approximately 3.14, the given formula, C = 2 (3.14) r, is an approximation. Solving it for r:
C = 2(3.14) r => as 2 * 3.14 = 6.28
C = 6.28 r => divide both sides by 6.28
r ( 6.28/6.28) = C/6.28 => as 6.28/6.28 = 1
r = C/6.28
Thank you,
MrB
With in quadrant 3, we should expect both and to be negative, so that is positive. The corresponding reciprocal expressions will have the same sign.
Recall that , which means
Also recall that , so
Only the first two options are correct.
Step-by-step explanation:
First we need to create and expression.
If there are seven more boys than girls in the class, and we don't boys as variable "b", and girls as variable "g" then:
b=g+7 or g=b-7
Next, we know the class has 29 students comprised of boys and girls. With the information we have we can set up an equation and solve for boys.
29=b+g
29=b+(b-7)
29=2b-7
36=2b
b=18
to check our answer:
g=29-b
g=29-18
g=11, which is seven less than 18.
Answer:
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Step-by-step explanation:
Answer:
15 in^2
Step-by-step explanation:
Find the area of the vertical rectangle
A = l*w
A = 6*2 = 12 in^2
Now find the area of the horizontal rectangle
A = l*w
= 3*1 = 3in^2
Add them together
12+3 =15 inch^2