angle and angle b are complentary angles. if angle a = (2x-5) and m angle b = (5x+4) then find the measure of angle a

Find the radius of a circle with an area of 90 cm^2

What property is shown in the equation 7x divided by 1 = 7x

500 tickets were sold for a concert. Some cost $5 and some cost $8. The cash received for the expensive tickets was $100 more than the cheaper tickets. Find the number of each kind of ticket which were sold.

In the United States, 63% of people wear a seatbelt while driving. What is the probability that they do not wear a seatbelt?

A triangle with side lengths 28ft., 45ft., 53ft. Is a right triangle.

A certain number was increased 5 times, then decreased by 3, then halved. The result was 0.3 less than the original number. What was the original number?

Identify and explain the error made in the following: 2x + 8x = 10x^2

How long will it take 10,000 to double at 11% simply interest

4. Simplify the product using FOIL. (4x + 3) (2x + 5) 8x2 - 14x - 15 8x2 + 26x + 15 8x2 + 14x - 15 8x2 - 26x + 15

How do you know whether an inequality has no solutions? How do you know whether the solutions are all real numbers?