Whats 10+9
19
or
21
pick the best answer

What is the simplified form of 7 √x • 7 √x • 7 √x • 7 √x?

Can someone pls ! pls answer all. no explanation needed..

Aportion of a hiking trail slopes downward at about an 84° angle. to the nearest tenth of a flot, what is the value of x, the distance the hiker traveled along the path, if he has traveled a horizontal distance of 120 feet? a. 143.3 b. 12.5 c. 120.7 d. 130.2