Simplify 5√7+√7-2√7

A. 4√7

B. 3√21

c. 3√7

d. 4√21

i really am stuck on this problem.

Imagine that a family of four (Wanda, Xavier, Yolanda, Zane) Play cars at home every night. Each night the chance that any one of the four players will win 1/4 if the family Place two consecutive games what is the probability that zane will win both

Sample space of a coin tossed 5 times in a row

A car company offers financing to its customers. For the newest model, customers can pay $2000 down and then $250 a month. Write an equation for this situation.

Find the mean and median of the data set. The numbers of hours Cheri works each day are 2, 6, 3, 5, and 4. The mean is. The median is.

Teresa planted marigolds into 2/8 of her garden and petunias in 3/8 of her garden what fraction of the garden has marigolds and petunias.

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.