Question

Given f(x) = –5x + 1, what is f(–2)?

A.-9


B.11


C.3/5


D.1

Answer 1

f(x) = –5x + 1, what is f(–2)?

What is \(f(–2)\) basically just asks for you to sub in \(-2\) for \(x\)

So:
\[f(x) = –5x + 1 \implies f(-2) = -5(-2) + 1 \implies 10 + 1\]
\[= 11\]

So B is you answer.

@kkbb240 if you do not understand just tag me and I will try to provide a better explanation. :-)

Answer 2

Looks like @Opcode got there before i did :)

Answer 3

thank u guys : )

Answer 4

opcode can u help me with some more questions

Answer 5

I can help you (:

Answer 6

ok :)

Answer 7

Which is a solution to the equation 5x – y = –3?

A.
(2, –7)

B.
(1, 2)

C.
(–2, 7)

D.
(–2, –7)

Answer 8

C

Answer 9

What is the slope of the graph of 2x – 6y = 9?

A -1/3

B -3

C 3

D 1/3

Answer 10

6y=-2x+9
Simplify to:
y=-1/3x+3/2

answer: A

Answer 11

Which relation is a function?

Answer 12

Graph B

Answer 13

A carpenter charges a one-time fee of $50 plus $35 for each hour on the job. If n is the number of hours on the job and c is the total charge for the work done, then the variables are related by the equation c = 35n + 50.

Which variable is the independent variable?

A.
n

B.
c

C.
There is no relationship between the variables.

Answer 14

A

Answer 15

What are the domain and range of the function {(3, 1), (5, –1), (9, –1), (2, 7), (–4, 1)}?

A.
Domain: {1, 7}; Range: {3, 5, 9, 2 }

B.
Domain: {1, –1, 7}; Range: {3, 5, 9, 2, –4}

C.
Domain: {3, 5, 9, 2, –4}; Range: {1, –1, 7}

D.
Domain: {3, 5, 9, 2 }; Range: {1, 7}

Answer 16

C

Answer 17

What are the intercepts of the line?



A.
x-intercept: 5; y-intercept: 4

B.
x-intercept: –4; y-intercept: –5

C.
x-intercept: –4; y-intercept: 5

D.
x-intercept: 5; y-intercept: –4

http://static.k12.com/calms_media/media/1299500_1300000/1299540/1/c6db42a0fee13e426890e2d3f18de4f5c5146e83/143707.jpg

Answer 18

D

Answer 19

The cost of a product has been increasing each year. The graph shows data about the product’s cost over time.

Which is a reasonable prediction for the cost of the product in year 12?



A.
$14

B.
$10

C.
$12

D.
$18

http://static.k12.com/calms_media/media/245000_245500/245365/1/52f449f37f05b75c2160b6a2ad1163ebf9acdd1b/VHS_PA_S2_02_L214_L314-UT_Q10.gif