If s = 1/4 and A = 16s to the 2nd power, what is the value of A, in square units?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

Which number completes the inequality? 2/3 < _ < 7/9