Mary and her brother john collect foreign coins. mary has 3 times the number of coins that john has. together they have 180 foreign coins. find how many coins mary has.

If the following system of equations was written as a matrix equation in the form AX = C, and matrix A was expressed in the form [a c b d], find the value of a - b + c + d.

Jasmine is arranging 3 flowerpots (red, blue and green) in a windowsill. Which tree diagram shows the possible arrangements of the flowerpots?

What is 100000000 divided by 9 then times 6

Variable y varies directly with x2, and y = 32 when x = 4. Which graph represents the quadratic variation?

If is parallel to, which statement must be true? A. The perpendicular distance between and decreases as the lines are traversed right to left. B. and do not intersect.

Which of the following describes the graph of y=x^2-144? The graph has zeroes at x = - 12 and x = - 12 and it opens downward. The graph has zeroes at x = 12 and x = - 12 and it opens downward.

You deposit $700 in an account paying 7.7% simple interest. Find the future value of the investment after 2 years. (Enter a number. Round your answer to two decimal places.)

What are two expressions where the solution is 19

The sum of two numbers is 17. The difference between the larger number (x) and the smaller number (y) is 7. What is the value of the smaller number?

10 kilograms = ? grams