Find in cm the diameter of a circle whose radius is 85 mm.

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13