Answer:

Step-by-step explanation:
Given


Required
Eliminate a
Multiply the first equation by -4

Add to the second equation

Solve brackets

Open bracket


At this point, a has been eliminated;
From the list of given options, the option that answers the question is 
Answer:
Step-by-step explanation:
(3(18)+2(3.99)+45)(1.08)=(106.98)(1.08)=$115.54 (rounded to nearest cent)
Answer:
Allie: 68 Sam: 59
Step-by-step explanation:
You take 40% from 68 and 25% from 236 and boom.
Answer:
7.416198
Step-by-step explanation:
You must find out which number produces 55 when multiplied by itself
Answer:
<em><u>4(10+9) - 40 + 36</u></em>
<em><u>9(5+2) - 45 + 18</u></em>
<em><u>3(12+7) - 36 + 21</u></em>