Write an equation that relates x and y. (table below).

x | y

1 | 1
2 | 3
3 | 7
4 | 15
5 | 3
6 | 63
7 | 127

use your equation to find the value of y when x = 15.

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

(x-5)1/2+5=2 what is possible solution of this equation

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?