Oliver raised his grade from an 85 to a 92 for the semester. what was the percent increase of his grade

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?