Ask a New Question

Question

I have this weird question that has to do with linear equations (I think), and this is what it says.

Let f(x) = 4x - 5

A. Find f(3)
B. Find x when f(x) = -21

Can somebody help me understand this??
12 years ago

Answers

Steve
f(x) tells you what f is for any value of x. So, f(3) means you substitute 3 wherever you see x:

f(x) = 4x-5
f(3) = 4(3)-5 = 12-5 = 7
f(0) = f(0)-5 = -5
etc.

So, if f(x) = -21, you have
-21 = 4x-5
-16 = 4x
x = -4
12 years ago

Related Questions

This is a bit weird to me. We're doing R and S configurations and I think of it as a steering wheel... this is a weird question but i need help on writting a conclusion about the color blue? Ok one maybe weird question. If Susie is married to Bruce now and they have a son whose name is Edwa... We got a really weird question When a person goes and measured themselves on the medical beam scale... This is a really weird question but mom in a dilemma. My economics teacher doesn't post our marks on... why do I like the weird dud in my class Weird question incoming… If someone or something were to be immortal, will they or it still be immo... How many R’s are in the weird strawberry? I know it’s a weird question but what would be altruism in Christmas? Have you ever had that weird feeling that you’ve experienced the same exact situation before, even t...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use