A triangle is 4 centimeters tall and has a base length of 9 centimeters. A Similar triangle has a base length of 18 centimeters. How tall is the similar triangle?

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?