Mary's age is twice the sum of John's age and 3. The sum of both ages is 21 years. Find the age of each one.

What coordinates solve both 6x+2y=-6 and 7x+4y=8? How do you get the answer?

Write - 3 - 6 as an equivalent addition problem (that is, a problem in which the same numbers or their opposites are added and will result in the same answer).

One method you can use to determine whether a triangle is a right triangle, given three side lengths, is to apply the Converse of the Pythagorean Theorem. Alternately, you can use trigonometric ratios.

Cans of soup are shipped in boxes that contain 24 cans. How many boxes are needed to ship 5,976 cans of soup?

Safe cracker riddle, 4 digit from 1 to 9 are required to open a safe. the sum of the digit is 20. the first digit is greater than the third. the second and fourth digits differ by at least 5. exactly 529 digits are square.

Jax and Sofia collect baseball cards. Jax has 56 cards and Sofia has 68. They each joined different baseball-collecting clubs. Each month, Jax's club will send him 4 new packages of cards. Sofia's club will send her 3 new packages per month.

Mrs. Daly's reading classes were surveyed about their reading preferences. the data is summarized in the table below. given that a student is in 9th grade, what is the probability that they like to read non-fiction novels, based on this data?

Rachel finished 3/4 of the race in 6 hours. How long was the entire race?

What is the answer: 1 2/5x - 12 + 2 3/5x = - 6x + 8 - 7x

During a recession, Tina had to take a 9 % pay cut. Her original salary was $45,230. a. What has her salary after the pay cut? b. Once the recession was over, Tina's company wanted to increase her pay to her original salary.