Step-by-step explanation:
Remove the parentheses: 15a²-6ab+8a²+20+5ab-31+a²-ab Combine like terms: 24a²-2ab-11
Answer: 24a²-2ab-11
Our goal is to isolate the variable, which is b. What you do to one side must also be done to the other side since we need to maintain equality.
Add 1 to both sides
b/5=11
Then multiply both sides by 5
b=55
Final answer: b=55
The first one should be $178
The second one would be 8 quarters
His current balance is $321.34
She would have $110.00 but with penalty she would have $106.75
-20 each year
how many years? 4
-20 times number of years=drop
-20 times 4=-80
dropped by -80 total
if costs 189 before, now it is 189-80=109
costs $109.00 today
