How can you solve multiplication fast with no calculator?

Carletta and Johnathan are entrepreneurs making mother boards for computers that are being manufactured by their friend, Dewey Sasser. Carletta can make one mother board in 12 hours while it takes Johnathan 16 hours to make one mother board.

Which one of the following numbers is an irrational number? Question 20 options: A) 134∕675 B) 3. C) 7.676767 ... D) 8.12131415 ...

Can someone show me step by step on how to do this? I dont know what order to do it in: -0.75 - (-2/5) + 0.4 + (-3/4)

Arif ordered a more expensive meals and Keisha. After the tax and tip were figured, he decided he should pay three dollars more than Keisha. How much should they each pay?

sallys cup cake shop sold a total of 63 cupcakes yesterday and 32 of those had sprinkles how many cupcakes were sold without sprinkles

Mrs. Jacobsen purchased a 5-pound package of ground beef for $12.40. She decided to use 8 ounces each day for dinner recipes. What was the cost of ground beef per meal?

If (7^2) ^p = 7^6, what is the value of p? 2 3 4 8

The population at Saint Maria High increased from 1800 students ten years ago to 1926 students last year. What was the percent increase?

A triangle is placed in a semicircle with a radius of 7cm, as shown below. Find the area of the shaded region. Use the value 3.14 for π, and do not round your answer. Be sure to include the correct unit in your answer. 7cm

What can each term of the equation be multiplied by to eliminate the fractions before solving