Evaluate (z^2)^4/5z^5 when z=5 and simplify

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

There are a total of 75 students in the robotics club and science club. the science club has 9 more students than the robotics club. how many students are in the science club?

Which of the following statements must be true about this diagram? check all that apply. x°, y°, z°, & w°