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

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

Is the square root of 180 between 13 & 14

What is 2/5 times 2/10 show explanation and step by step explanation

The area of a certain square is 64. What would be the area of second square whose perimeter was half as large as that of the first?

Samuel needs 332 feet of wood to bulid a fence the wood comes in lengths of 15 feet. How many total piece of wood will samuel need? Theresa needs twice as many feet of wood samuel? How many pieces of wood does theresa need?

The measure of the length of a rectangle is 5x and the measure of the width is 3x. Find the measure of the area. Exponents can be entered in your answer in the form " (x^2) ".

Stephen has art lesson every 6 days. And a swim lesson every 9 days. He has both art and swim lesson on Tuesday. On which day of the week will he have both lessons again?

A survey has a margin of error of + / - 3%. What is the range of number of people who will vote for a candidate if 87 of the 110 people said they would vote for the candidate and there are 9570 people in the district? A. 7342 to 7796 B.

Pittsburgh international airport had approximately 714,58 passen agers in august 2009. write a number that is greater than 714,587.

Find the length of the hypotenuse in the following figure. The height is 4 the base is 10 (A) 18 (B) 58 (C) 29 square root of 2 (D) 2 square foot of 29

A factory produces 1085 nuts per day. Then find the number of nuts that can be produced in 17days?