Answer:
Step-by-step explanation:
im pretty sure its a
There are 60 minutes in an hour and percent means per one hundred so:
p/100=18/60
p=1800/60
p=30%
Answer:
B
Step-by-step explanation:
A. these simply to 21 + 7x and 21 + 3x
- this one is incorrect because the 7x and 3x are different
B. these simplify to 10 + x and 10 + x
- this is the correct one since they are exactly the same
C. these simplify to 21x and 7x + 21
- these two are not the same because one expression has only a number with a variable but the other one has a number with a variable <em>and </em>another number
D. these simplify to
and 
- in subtraction, the order of the 3 and the x matters, so the equations are not the same
- example: 6 - 4 = 2 but 4 - 6 = -2
Hi!
We can set up a proportion then cross multiply to solve this.

45 x 100 = 4500
4500/18 = 250
The answer is 250
Hope this helps! :)
~45.25 because the formula for circumference is 2(3.14286)a or 2(3.14286)7.2