7a - 4a for a = 8 Anyone know the answer?

Which statement about the annual percentage rate (apr) is not true?

What are the domain and range of the function f(x)=2^x+1

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96