A parabola has x-intercepts at X=4 and X--2. If the parabola is concave up, then which of the following could be the equation for this parabola?

Nine more than four times a number is the same as one less than twice the number. find the number?

For what value of (y) is 3^3/3^y =1/9

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212