HELP ASAP!! Combine like terms:

-7x + 8 - 4x - 9

answers:

1. -11x - 1

2. -3x - 1

3. -11x + 17

4. -12

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Arestaurant charges $100 to rent its banquet room for an event. it also charges $15 to serve dinner to each guest. write an equation for the total cost of the banquet room in terms of the number of guests. deine your variables. what is the total cost of the banquet room for 20 guests?

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.