2X-20

Solve: 2x - 20 = 2x

= 2x

For every girl taking a martial arts school, there are 3 boys who are taking classes at the school. If there are 236 students taking classes, write and solve a proportion to predict the number of boys taking classes at the school.

X:3 (2x-5) - 2 (4x+1) = -5 (x+3) - 2.

A room is 20 feet long, 12 feet wide, and 10 feet high. What is the maximum distance from one corner to another

A day of the week is chosen at random. What is the probability it starts with an S or T? and A card is chosen at random from a standard deck of cards. What is the probability that it is an ace or a king?

Is the expression 3 (x + 1 1/2) - 3 equivalent to 3x + 1 1/2

What is 100 times as much as 56,900?

Least common multiple of 2,5,6

15y + 6y - 3x + xy combining like terms

Janice's homeroom class has between 27 and 36 students. Exactly half of the students in her class have green notebooks, and exactly have pink notebooks. How many students are in Janice's class?

On Sarah's 16 GB flash drive, she can fit 16 video clips of about 1 GB each, two movies of about 8 GB each, or 4000 songs of about 4 MB each.