What is the value of the function when x=−3x
a) -13
b) -9
c) -5
d) 9

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Adoughnut shop charges $0.50 for each doughnut and $1 for a carryout box. shirley has $10 to spend. which inequality can be used to find d, the number of doughnuts she could have bought if she also wants them in one carryout box?