Ella bought 8 keychains. She spent 4 dollars on each KeyChain. Hope this helps
Answer: 
Step-by-step explanation:
Given
It takes 20 min and 30 min for a person and his friend to paint a wall individually i.e.
In 1 min they cover
part and
part of wall respectively.
If the work together, 1 minute work is

Time required will be reciprocal of it

Answer:
Step-by-step explanation:
<u>Multiplying a positive and a negative</u> number will gives us a negative number
-412 *212 = - 87,344
She done better at the 2nd test because she only got 4 wrong but on the first test she got 6 wrong.
She will get 3 because if you multiply 1/8 and 3 you will get an answer of 3/8