State the axis of symmetry and vertex of the following quadratic function. show all work.
y = -x² - 7x -18

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

What is the radical expression that is equivalent to the expression 27 1 over 5?