What is the factor of 4x^2-25

If the ratio of boys to girls in a class is 7:8 how many girls would be in class of 45 students?

Margaret is renting bowling shoes for $1.50 every time she goes bowling. She could get a good pair of bowling shoes for $48. If she goes once every two weeks during the year, would it be less expensive to rent or buy?

Amy ran 2/3 of a marathon. Beth ran 5/6 of a marathon. Who ran farther? How much farther?

Miche found that most helicopters fly at speeds of less than 270 kilometers per hour. Her work is shown below. s > 270 A number line going from 260 to 285. An open circle is at 270. Everything to the right of the circle is shaded.

If x=2 and y=4 what is the answer to 3x + 2y + 4

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.