Find the exact solution of -x^2+3x+7=0 by using the Quadratic Formula?

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

Askateboard ramp is in the shape of a right triangle what is the height of the ramp

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x