4
-5a+b=8
7a +9b = -32
i need to use substitution for this one. ?

Ahigh definition tv cost $800 with a down payment of 2/5 of the cost. how much is left to pay, in dollars after the down payment has been made?

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?