What it means a line on top of a number

Express 0.00078456 in scientific notation

What is the length of leg sof the triangle below? 90°

Which number (s) from the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, if any, will solve this equation? 2x + 3 = 5x - 3

How to solve step by step 453 divided 8

Factor x2 - 6x - 7. a. (x - 7) (x 1) b. (x 7) (x - 1) c. (x 4) (x 7) d. (x - 7) (x - 1)

2.2 A Train is Traveling at ... A train is traveling at a constant speed and goes 7.5 kilo "1 dl a constant speed and goes 7.5 kilometers in 6 minutes. At that rate: 1. How far does the train go in 1 minute?

Which of the following represents the most accurate estimation of 664 - 127?

What is the rule if the input numbers are 1,2,3,4,5 and the output numbers are 2,5,10,17,26

What's the difference between 4.5 and - 3.5

Joe went to the store and bought six packs of pens for $1.79 each, five erasers for $.89 each and a pack of paper for $3.29. He had a coupon for 25% off and then had to pay 6% tax. What was the final cost of his purchase?