Question

PLEASE HELP I WILL FAN AND MEDAL AND BE YOUR BEST FRIEND

The radius of a circle is 28 centimeters.

What is the diameter of the circle?

A.
14 centimeters

B.
28 centimeters

C.
56 centimeters

D.
66 centimeters

Answer 1

Simply put, the formula for the diameter of a circle is "d=2(r)", where r is the radius. So, just put in what you know.

Answer 2

is it C? @noseboy908

Answer 3

That would be correct!

Answer 4

thank you so much! could you help me with some more? @noseboy908

Answer 5

Sure, just put them here and I shall do my best.

Answer 6

If f(x) = 0.5(1 – x), what is the value of f(–1)?

A.
2.5

B.
1

C.
0.5

D.
0

Answer 7

@noseboy908

Answer 8

I'm here, please don't keep mentioning me with the @ sign.

Answer 9

Now, as to the problem, the most important thing to grasp here is the fact that when they give you that f(x) is equal to something, all you have to do is substitute in what they tell you x is. You can tell what x is by what they put in the parenthesis next to the f. (Because you're mere substituting it for x in "f(x)".)

Answer 10

so x = 0.5 ?

Answer 11

I'm afraid not. Let's work this one out together, step by step. firstly, what did you substitute in for x?

Answer 12

idk

Answer 13

Look at what I previously said. I said that you get what you plug in for x by looking at what is put in place of the x in "f(x)" in the given information part.

Answer 14

so -1?

Answer 15

Correct! Now please plug that in for x in "f(x)=.5(1-x)".

Answer 16

f(-1)=.5(1- -1)
idk how id do that last part
is any of that even right?

Answer 17

Yeah, you're completely right up to this point. The rule you need here is this (And I'd highly suggest memorizing it): "Subtracting a negative number is like adding a positive one."

Answer 18

so what do i do next then? using what you just said of course

Answer 19

Try to simplify the contents of the parentheses. Tell me what you get.

Answer 20

Keep in mind the rule I just mentioned.

Answer 21

okay i have to leave for like 30 ish minutes so hopefully youll still be online when i get back but maybe not bye for rn

Answer 22

ok.

Answer 23

okay im back @noseboy908