1. D
2. A
3. B
4. A
5. C
6. D
7. A
Answer:
-a +27=28
Step-by-step explanation:
2a+12-3a+15=18
-a+27=18
Answer:
a
Step-by-step explanation:
add equations in order to slove for the first variable. plug this value into other equations in order to solve for the remaining variables
27 = 22 - 2(3 - 1w)....first, we distribute thru the parenthesis
27 = 22 - 6 + 2w...simplify
27 = 16 + 2w...now we subtract 16 from both sides
27 - 16 = 2w
11 = 2w...now we divide both sides by 2
11/2 (or 5 1/2) = w
A. 200.625 minutes B. 184.166 minutes C. 200 minutes (round these answers like the question asked) 4. Plan A is the best because you get the most minutes for your money. I will explain my work for A, but if you need to explain the rest just ask. So, if you have to pay $3.95 every month no matter what and $0.08 for every minute you talk you can write the equation as, Cost = 3.95 + 0.08m (m stands for minutes), and the cost is 20$ then the equation is 20 = 3.95 + 0.08m, subtract 3.95 from the right side to make it 16.05 = 0.08m, then divide everything by 0.08 to get m, which gives you m= 200.625