What are some characteristics for a good math explanation

How do you work out this math problem? 3x+5+2x=12+4x

It snows 0.7 inches on wednesday and 0.31 inches on thursday. Brandon draws this model to find how much more snow fell on wednesday than on thursday. which equation dose the model represent a. 0.7 + 0.31 = 1.01 b. 0.7 + 0.31 = 0.38 c. 07 - 0.31 = 0.

What is the Anwser if a divide 33 into 2 groups so the ratio is 4 to 7

Solve the following equation. Then place the correct number in the box provided. 5x = 25

The mean of seven numbers is 21. Five of the numbers are 18,23,21,17, and 19. One of the remaining numbers is 3/4 of the other remaining number. What are the two unknown numbers?

Nina is the head nurse at a hospital and must order supplies. If 1/4 of a package of bandages lasts 1/8 of the month, how many packages of bandages are need for the entire month? Set it up!

Solving two step equations-7=3g-49

Which of the following graphs represents the line that passes through (-2, - 3) and has a slope of 2/3?

Bicycle city makes custom bicycles. They charge $160 plus $80 for each day that it takes to build the bicycle. If you have $480 to spend on your new bicycle, how many days can it take Bicycle City to build the bike?

According to the formula for stopping distance, how many feet will it take you to stop, from 60 mph? A. 180 B. 600 C. 360 D. 120