Add the following polynomials, then place the answer in the proper location on the grid. write the answer in descending powers of a. add: 2a3 + 5a - 7 and 5a2 - 6a + 12

When you arrive at the lake, your friend realises he hasn’t got any swimming trunks. you need to ride to a sports shop. the sports shop is 8350 metres away. how many metres is it to cycle there and back?

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

3x + 4y = 5 x- 3y = -7 solve by substitution