Question

If f(x) = 2x^2 - 30, find f(4).

35

-14

2

17

Answer 1

@marissalovescats

Answer 2

Plug in 4 for x

Answer 3

f(4)= 2*4^2-30

Answer 4

Yes

Answer 5

f(4)=2(4)^2-30
f(4)=2(16)-30
f(4)=32-30
f(4)=???

Answer 6

I the answer 2?

Answer 7

Ye

Answer 8

Thak you!

Answer 9

Yes it's 2.

You're welcome :) Great job!

Answer 10

Lol, could y'all help me with one more?

Answer 11

Yeah I can

Answer 12

I dont understand this problem

The first five terms of a sequence are shown below:

4, 7, 10, 13, 16

If the nth term of this sequence is represented by f(n), which of the following functions best represents this sequence?

f(n) = 3n - 1; n ≥ 1

f(n) = 3n + 1; n ≥ 1

f(n) = 4n - 1; n ≥ 1

f(n) = 4n + 1; n ≥ 1

Answer 13

So this is an arithmetic sequence and there is a formula for it, it is

an=a1+(n-1)d

Where a1 is the first term and d is the difference

Answer 14

I dont know if its either B or C

Answer 15

The first term in the sequence they gave you was 4 then 7,10,13,16,etc.

So you can tell the difference is that you are adding 3

Answer 16

So we plug it in