Which equations are true?

Choose all answers that apply:

A. x - (-x) = - x

B. 0 - (-x) = - x

C. None of the above

Tom earns $30 a week mowing lawns. He spends one-tenth of his earnings on lunch and one-fifth of his earnings on music. He saves the rest. How many dollars does Tom save? Tell me how you found the answer.

Ana wants to burn at least a 400 calories at the gym. She burned 120 calories on the bike, then moved to the treadmill. If she burns 8calories per minute on the treadmill, how many more minutes does she need to exercise

A square has an area that is less than 100 m². What is a reasonable range for the graph of the square side?

The measures of the four interior angles of a quadrilateral are $x, 2x, x 20,$ and $x 40$ degrees. How many degrees are in the measure of the largest interior angle of the quadrilateral?

A cubic yard weights 4,128 pounds how many 50 pounds bags of topspil can you fill with 1 cubic yard of topsoil

If the following systerm of equations was written as a matrix equation in the A=[a c] [b d] form AX = C and matrix A was expressed in the form, find the value of a-b+c+d 2x + 8y=7 4x - 2y = 9

Simplify (4x2 - 8x + 16) / 4

What are the perfect cubes between 100 and 600

700 people are in a group. We'll use F to represent the first initial of their first name, L for the first initial of their last name. Each person is identified with a pair (F, L).

A jar holds 2 3/4 cups of water. How much is this in fluid ounces