Question

One of the solutions to x2 − 2x − 15 = 0 is x = −3. What is the other solution?

x = −5
x = −1
x = 1
x = 5

Answer 1

The only solution of the equation x2 + bx + 16 = 0 is x = 4. What is the value of b?

b = –16
b = –8
b = 8
b = 16

Answer 2

An equation has solutions of m = –5 and m = 9. Which could be the equation?

(m + 5)(m – 9) = 0

(m – 5)(m + 9) = 0
m2 – 5m + 9 = 0
m2 + 5m – 9 = 0

Answer 3

Brianna is graphing the function f(x) = x2 + 6x + 5. What x-intercepts should Brianna use to graph f(x)?

–5 and –1
–5 and 1
–1 and 5
1 and 5

Answer 4

The function h(x) is quadratic and h(3) = h(–10) = 0. Which could represent h(x)?

h(x) = x2 – 13x – 30
h(x) = x2 – 7x – 30
h(x) = 2x2 + 26x – 60
h(x) = 2x2 + 14x – 60

Answer 5

The function g(x) = x2 – 10x + 24 is graphed on a coordinate plane. Where will the function cross the x-axis?

(–6, 0) and (–4, 0)
(–2, 0) and (–12, 0)
(4, 0) and (6, 0)
(12, 0) and (2, 0)

Answer 6

x=5

Answer 7

The only solution of the equation x2 + bx + 16 = 0 is x = 4. What is the value of b?
Since the only solution is x=4, you can set up the factored version.
(x-4)(x-4)
Use FOIL.
x^2-8x+16
So, b=-8

Answer 8

An equation has solutions of m = –5 and m = 9. Which could be the equation?
You are given the solutions, now set the up in factored for.
(m+5)(m-9)
Because m+5=0
Subtract 5 from both sides ---> m=-5
and m-9=0
Add 9 to both sides ---> m=9

Answer 9

Brianna is graphing the function f(x) = x2 + 6x + 5. What x-intercepts should Brianna use to graph f(x)?
-5 and -1
Graph it and see for yourself.

Answer 10

The function g(x) = x2 – 10x + 24 is graphed on a coordinate plane. Where will the function cross the x-axis?
(4, 0) and (6, 0)
Graph it, and you'll see for yourself.

Answer 11

The function h(x) is quadratic and h(3) = h(–10) = 0. Which could represent h(x)?
h(x) = 2x^2 + 14x – 60
Because
h(3)=2(3)^2+14(3)-60
=18+42-60
=0

Answer 12

PLEASE post ONE question at a time!!

Answer 13

thank youu