Why can't the expression 13x+10 be factored

You are ima room with other students and are asked to get in groups of 3. When finished, there are 21 groups of 3. How manny students are in the room?

The measure of angle A is 45 degrees. The measure of angle B is b degrees. The measure of angle C is 3b degrees

Marcy bought 1/4 pound of chocolate covered caramels at $2.69 a pound and 1/4 pound of coffee at $3.50 a pound how much did the candy cost

Owen's math book weighs 2 pounds 13 ounces. His science book weighs 1 pound 15 ounces. His backpack weighs 1 pound 1 ounce. What is the total weight in ounces of the backpack and the two books?

Ashley has money automatically deposited into a savings account each week. After 4 weeks, she has $20. After 6 weeks, she has $30. The unit rate is measured in dollars per week. What is the constant of proportionality?

What is y-2=-3 (x-7) written in standard form?

Tim has 12 books and 27 magazines in his libary. He bought several books at a yard sale over the weekend. He now has 58 books in his libary. How many book did he buy at a yard sale

Find the y-intercept of the parabola y = x2 + 4x.

Eli made 6 more goals in the soccer game then spencer. Spencer made x goals. Write an expression to show how many goals Eli made

What decimal is equivalent to 42%