If 7 is added to twice a number and this sum is multiplied by 5, the result is the same as if the number is multiplied by 6 and 11 is added to the product. What is the number?

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

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

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).