Answer:
Step-by-step explanation: to find circumference, u do 2*pi*radius or pi times diameter
318*2-47=589 There are 589 nonfiction books in the library
If the two triangles are similar you can use a proportion to solve for the length of the legs.

=

Now, you would cross multiply to get
4x=18
Now, you simplify that using the division property of equality.
You end up with
x=4.5
Therefore, the legs of the triangle with a base of 9 inches will each be 4.5 units long.
Answer:
x=1
Step-by-step explanation:
Since you know two sides and are trying to find the missing side, you can use the Pythagorean Theorem. So fashion the equation like this:
x^2 + 3^2 = sqrt10^2. After simplify, which leads to x^2 + 9 =10. Then have the variable to one side by subtracting 9 on both sides. This leads to x^2=1. Finally, square root both sides which leads to 1. Note that any root of 1 is 1. So your answer becomes x=1.
Hope this helps!
Let's solve for k. (-m)(k) - 90>85
step 1: add 90 to both sides.
-km -90+90> 85+90
- km > 175
step 2: divide both sides by -m
-km >175
-m -m
K< -175
m