Question

What is the value of 54 – 4a2 + 3b3 when a = −2 and b = 4?

Answer 1

What do you think?

Answer 2

also, I'm assuming you have this: \[54-4a^2+3b^3\]

Answer 3

Well i really don't know what it is! i just need help

Answer 4

ok, so do you understand the concept of substituting?

Answer 5

No not really

Answer 6

Well... kinda

Answer 7

ok, check this out http://www.purplemath.com/modules/evaluate.htm
then come back

Answer 8

Alright

Answer 9

Then once you've read the website, give this a try and we can see how it turns out

Answer 10

is this expressions? i usually have trouble with variables

Answer 11

I don't understand your question.

Answer 12

is this expressions?

Answer 13

a variable is like a tupperware container, you can put different things in it to hold them.

Answer 14

The question is this expressions makes no sense. Everything in math is called an expression. 3+6 is an expression, sentence, problem, etc

Answer 15

okay i know this now

Answer 16

Then give it a try

Answer 17

it's 106

Answer 18

Can you show your work please

Answer 19

cause it isn't 106