Consider the function f(x)=x2+bx−16, where b is a constant.
Part A
If the function has an axis of symmetry at x=5, what is the value of b?
Part B
If b=−6, what are the zero(s) of the function?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

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?

Kerion has a beaded necklace business. she can make 12 necklaces is 2 hours. how long will it take her to make 9 necklaces?