Combine the like terms to make a simpler expression: 8r+7-6r-5

The difference of two numbers is 8. When twice the first number is added to three times the second number, the result is 51. What are the two numbers? A. 12 and 4 B. 15 and 7 C. 20 and 12 D. 23 and 15

Y = 6x - 11 - 2x - Зу = - 7 Solve the systems of equation by substitution

The lengths of the sides of four triangles are given. Which triangle is a right triangle? F: 2, 3, 4 G: 11, 15, 20 H: 10, 24, 26 J: 5, 5, 5

10) A train travels 40 miles in 65 minutes. To the nearest tenth of a mile, how far does the train travel per minute?

How to do similar figures

The isotope cobalt-60 has a nuclear mass of 59.933820 u Calculate the binding energy of cobalt-60 using the following information. Mass of Proton: 1.007825 u Mass of Neutron: 1.008665 u 1 u = 931.5 MeV

2 times a number plus 3 equals one half a number plus 12

Seven-tenths of a number decreased by thirteen is equal to three-tenths the number increased by 13

Numbers on the y-axis increase in which direction on a coordinate plane? a. Down b. To the left c. To the right d. Up

What is the difference of - 1/8-[67/8]