The sum of the first and second terms of an AP is 4 the tenth term is 19 find the sum of the fifth and sixth terms

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?