A number, n, is added to 15 less than 3 times itself. The result is 101. Which of the following can be an equation can be used to find the value of n?

a. n + (3n - 15) = 101

b. 4n - 15 = 101

the length of one leg of a right triangle is 6 feet. the length of the hypotenuse is 2 ft longer than the other leg. Find the length of the hypotenuse in the other leg.

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A ball is kicked straight up into the air. The height of the ball in feet is given by the expression - 16t2 + 12t + 4, where t is time in seconds. Factor the expression. Then find the height of the ball after 1 second.