I need a step by step explanation of how to do this problem mentally and quickly:

7 3/4 - 1 2/7 - 3/2

What is the volume, in cubic ft, of a cylinder with a height of 15ft and a base radius of 10ft, to the nearest tenths place?

Simplify simplify - 2 (x-2)

One printing machine printed 500 books in 40 hours this week. A second printing machine printed for 30 hours this week but printed books at twice the hourly rate of the first machine. How many books did the second machine print this week?

Given the polynomial function f (x) = x^3 - 4x^2 + x + 6 1) Name all of the possible roots for the function using the Rational Root Theorem. 2) Prove 2 is one of the zeroes of this function (show or describe your process).

Write 3x^3-21x^2+36x in factored form

Which fraction is greater than 2/5, 5/10 1/10 1/5 4/10

A company is planning to manufacture mountain bikes. The fixed monthly cost will be $400,000 and it will cost $200 to produce each bicycle.

Write the slope-intercept form of the equation for the line. Write the slope-intercept form of the equation for the line.

A wallet that holds $25 contains the same number of $1 bills, $5 bills, and quarters. How many of each type of bill or coin does the wallet contain?

According to an article on the Guardian website, a British woman in 2003 has probability 0.27 of living at least 100 years. suppose that you randomly select 200 women who were born in 2003. will exactly 54 of them live at least 100 years?