What is the value of n so that the expression x^2+11x+n is a perfect square trinomial? (1 point)
x^2 + 11x + (5.5)^2
(x+5.5)^2 = x^2 + 11 x + 30.25
What is a solution of x^2+6x=-5? (1 point)
x^2 + 6 x + 5 = 0
x = [ - 6 +/- sqrt (36-20) ]/2
x = -3 +/- 2
x = -5 or -1
What is the solution of x^2+14x+112=0? If necessary, round to the nearest hundredth. (1 point)
A box shaped like a rectangular prism has a height of 17 in and a volume of 2,720 in^3 The length is 4 inches greater than twice the width. What is the width of the box? (1 point)
Can someone help me with these problems so i can do the rest of my textbook work on my own plz?
What is the value of n so that the expression x^2+11x+n is a perfect square trinomial? (1 point)
What is a solution of x^2+6x=-5? (1 point)
What is the solution of x^2+14x+112=0? If necessary, round to the nearest hundredth. (1 point)
A box shaped like a rectangular prism has a height of 17 in and a volume of 2,720 in^3 The length is 4 inches greater than twice the width. What is the width of the box? (1 point)
4 answers
What is the solution of x^2+14x+112=0? If necessary, round to the nearest hundredth. (1 point)
x = [ -14 +/-sqrt(196 -448) ]/2
x = -7 +/- (7.94)i
A box shaped like a rectangular prism has a height of 17 in and a volume of 2,720 in^3 The length is 4 inches greater than twice the width. What is the width of the box? (1 point)
L = 2w+4
2720 = 17(w)(2w+4)
160 = 2 w^2 + 4 w
80 = w^2 + 2 w
so
w^2+2w - 80 = 0
(w-8)(w+10) = 0
w = 8
x = [ -14 +/-sqrt(196 -448) ]/2
x = -7 +/- (7.94)i
A box shaped like a rectangular prism has a height of 17 in and a volume of 2,720 in^3 The length is 4 inches greater than twice the width. What is the width of the box? (1 point)
L = 2w+4
2720 = 17(w)(2w+4)
160 = 2 w^2 + 4 w
80 = w^2 + 2 w
so
w^2+2w - 80 = 0
(w-8)(w+10) = 0
w = 8
Thank you Damon, I appreciate it :)
You are welcome.
1 answer