The triangle shown below has an area of 20 units square find the missing side

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Bob paid $3 less than tim at a local pizza parlor. together they spent $7.80. how much did bob pay for pizza?