X^2 + X - 12 = 0 In the equation above a is a solution. If a > 0 what must a be equal to?

a: -4
b: 4
c: -3
d: 3

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the