In an orchestra there are 4 violas for every 7 violins. If there are 12 more violins than violas, how many of each instrument are there? use the tape diagram method

Which graph corresponds to the function f(x) = x2 + 4x – 1?

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?

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