Solve x^2 - 10x = -21.
a. x= 7 and x = 3
b. x= -7 and x = 3
c. x=-7 and x = -3
d. x= 7 and x = -3

A

Step-by-step explanation:

1.move -21 over to the other side to get x^2 - 10x +21

2. factor. you want to find something that multiples to 21 (the c value) but adds up to -10 (the b value.) the numbers are -7 and -3. so you would factor it out like this: (x-7)(x-3)

3. set each factor to 0 to find the x values

x-7=0 and x-3=0. once you move the numbers over to isolate the x term, you should get x=7 and x=3.

the correct answer is b. negative exponential growth.

step-by-step explanation:

you can tell it's an exponential function because it decreases rapidly then levels out and never touches the x-axis.

it is negative because the y-axis decreases as the x-axis increases.

therefore it is a negative exponential growth graph.

hope i !

h * s * a

h = history teacher

s = science teacher

a =   art teacher.

i see no data table, but just multiply the number of history teachers, science teachers, and art teachers.