How to find the measure of one interior angle in a regular polygon without measuring

Three times the sum of nine and a number is at most - 9

5x-1=15x-101 equation

Allie aunt has saved $10,000 in $20s. She spends $20 bil everyday. How many days will it take her to run out of bills?

Find the total cost of a $58 bill with a 20% tip

The vertices of triangle RST are R (-4,4) S (5,4), and T (-1,-5). If ΔLMN is similar to ΔRST and, which could be the coordinates of vertices L and M?

Find the exact value of sin-1-32

Margo can purchase tile at a store for $0.69 per tile and rent a tile saw for $32. At another store she can borrow the tile saw for free if she buys tiles there for $1.49 per tile.

Fannie Flynn compares her checkbook register, cancelled checks, and bank statement which shows a balance of $300.42. She finds two outstanding checks for $98.25 and $59.35. There is also an outstanding deposit of $19.95.

The dance teacher bought a roll of ribbon that is 201.5 yards. She needs 15.5 yards of ribbon for each dancer. How many 15.5 yards pieces of ribbon can they cut from each roll on ribbon

A woman put $580 into a saving account for one year. the rate of interest on the account was 6 half %. how much was the interest for the year in dollars and cents?