Select the polynomial that is a perfect square trinomial.
a. 49x2 − 8x + 16
b. 4a2 − 10a + 25
c. 25b2 − 5b + 10
d. 16x2 − 8x + 1

The parabola opens: y=√x-4 (principal square root) up down right left

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

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0