why are you allowed to simplify 2 times the square root of 5 times 2 times the square root of 5, but you can not simplify 3 time the square root of 7 times 5 times the square root of 11?

An arrow is shot vertically upward at a rate of 180ft/s. use the projectile formula h=−16t2+v0t to determine at what time(s), in seconds, the arrow is at a height of 420ft. round your answer(s) to the nearest tenth of a second.

You are making a blueprint of your bedroom and you plan to use a scale factor of 18 . the actual width of your room is 14 feet and the actual length of your room is 16 feet. determine the width and length of your room on the blueprint. on the blueprint, your room will have a width of feet and a length of feet.

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.