What is the value of x if 5^x+2 =5^9
A. X=-11
B. X=-7
C. X=7
D. X= 11

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

Find the solution(s) to x^2-14+49=0

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?