Answer:
7
Step-by-step explanation:
form a proportion
12/2=42/x
cross multiply
12x=84
x=7
You would start out by putting 225 over 100 then simplifying from there. You would end up getting 9/4. As a mixed number that would be 2 and 1/4.
Answer:
<em>The expression is equivalent to 1,125</em>
Step-by-step explanation:
<u>Arithmetic Expressions</u>
It's given the word expression: "three squared times five cubed". It can be written in math form as:

Expanding the powers:

The expression is equivalent to 1,125
- 30m^2 - 10m + 30
distribute your negative 10, you will first get 30m, then - 30m^2.
next distribute the negative 5, you will get - 40m, then 30.
combine like terms, and make sure its in standard form, - 30m^2 - 10m + 30