Solve the system equations - x-y=0 and 6x-5y=66 by combining the equations

Next weekend, a student wants to study for his four classes. If he has h hours to study in all and he wants to devote the same amount of time to each class, how much time will he study per class?

The length of a rectangle is 3cm more than twice it's width. The perimeter of the rectangle is 65 square cm. Determine the length and width of the rectangle

A toxic radioactive substance with a density of 7 milligrams per square centimeter is detected in the ventilating ducts of a nuclear processing building that was used 45 years ago.

A map is scaled so that 3 cm on the map is equal to 21 actual miles. if two cities on the map are 5 cm apart, what proportion would you use to solve the problem?

Simplify: - 3y + 2x - 10y - 5x + 2y

Solve the equation by completing the square. round to the nearest hundredth if necessary. x^2-6x=20

What is the complementary angle of an angle that measures 30 degrees?

Here is a simple question: Why is 2 + (-3) equal to - 1?

What does 8:8 equal?

the klopowski family went out to dinner the price of the meal was 49.25 the sales tax was 8% the cost of the meal the tip was 18% of the meal and the sales tax how much did the klopowski family pay for their meal, including tax and tip?