190k views
2 votes
Find f(-10) f(x)=7x-5​

User Benjam
by
5.7k points

2 Answers

1 vote

Answer:

Rewrite the equation in term of

x

and

y

.

f

(

x

)

=

2

x

2

7

x

+

5

Rewrite the equation in vertex form.

Tap for fewer steps...

Complete the square for

2

x

2

7

x

+

5

.

Tap for more steps...

2

(

x

7

4

)

2

9

8

Set

y

equal to the new right side.

y

=

2

(

x

7

4

)

2

9

8

Use the vertex form,

y

=

a

(

x

h

)

2

+

k

, to determine the values of

a

,

h

, and

k

.

a

=

2

h

=

7

4

k

=

9

8

Find the vertex

(

h

,

k

)

.

(

7

4

,

9

8

)

Explanation:

User Lizmary
by
5.7k points
5 votes

Answer:

f(-10) = -75

Explanation:

F(x) is simply another way of saying y. We are given the x value of -10. We can substitute this in for x and find y.

f(-10) = 7(-10) - 5

f(-10) = -70 - 5

f(-10) = -75

User Tominator
by
4.4k points