Solve to determine if the following expressions are equivalent: 8a - 4 + 2a and 6a + 4. equivalent not equivalent unknown

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?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Qrst is a parallelogram. determine the measure of ∠q pls