anonymous
  • anonymous
can anyone help me??? please!!!!
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Julie is at the store buying groceries. She needs to get a quart of orange juice and some peaches. The quart of orange juice costs $2.25 and the peaches are $0.75 each. The function f(x) = 0.75x + 2.25 represents Julie's expenses at the grocery store. What do the f(x) and the x represent?
anonymous
  • anonymous
A:f(x) represents the number of items purchased at the grocery store; x represents the number of peaches purchased B:f(x) represents the total cost of the grocery bill; x represents the cost per peach C: f(x) represents the number of items purchased at the grocery store; x represents the cost per peach D: f(x) represents the total cost of the groceries; x represents the number of peaches purchased
anonymous
  • anonymous
Orange juice cost $2.25 right? and Peaches are 0.75 which is 75 cents the word "each" is how many.

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More answers

anonymous
  • anonymous
If she buys 1 peach it is 75 cents 2 peaches is $1.50 3 peaches is $2.25
anonymous
  • anonymous
so would it be D
anonymous
  • anonymous
Yes, it is. Nice job.
anonymous
  • anonymous
thank you but can you help me with another question? @shalante
anonymous
  • anonymous
Yes.
anonymous
  • anonymous
Which of the following exponential functions goes through the points (1, 6) and (2, 12)?
anonymous
  • anonymous
f(x) = 3(2)x f(x) = 2(3)x f(x) = 3(2)−x f(x) = 2(3)−x
anonymous
  • anonymous
2. The balance in two separate bank accounts grows each month at different rates. The growth rates for both accounts are represented by the functions f(x) = 2x and g(x) = 4x + 12. In what month is the f(x) balance greater than the g(x) balance?
anonymous
  • anonymous
can you write the choices in draw mode?
anonymous
  • anonymous
what do you mean
anonymous
  • anonymous
|dw:1439596152736:dw| like this.
anonymous
  • anonymous
|dw:1439596167634:dw|
anonymous
  • anonymous
sorry for the bad writing
anonymous
  • anonymous
Do this first: \[(a)^b \], then multiply the outside.
anonymous
  • anonymous
how do i do that?
anonymous
  • anonymous
Plug in the 1 from (1,6) and 2 from (2,12) and see if it matches.
anonymous
  • anonymous
like do you want me to do slope formula
anonymous
  • anonymous
So replace the x with 1 to see if it equals to 6 replace the x with 2 to see if it equals to 12 No, read your question again.
anonymous
  • anonymous
You told me to help you with another problem and you posted 2 more. Only one at a time please. It is confusing...
anonymous
  • anonymous
ok wait
anonymous
  • anonymous
I would help you one problem at a time. So one by one.
anonymous
  • anonymous
ok they match
anonymous
  • anonymous
@Shalante
anonymous
  • anonymous
Which particular one?
anonymous
  • anonymous
f(x)=3(2)^x
anonymous
  • anonymous
Yes that is correct. Nice!
anonymous
  • anonymous
so would that be the answer @Shalante
anonymous
  • anonymous
Yes, it is the only one that goes through (1,6) and (2,12)
anonymous
  • anonymous
what about the 3rd question how do solve it
anonymous
  • anonymous
is there a graph of it?
anonymous
  • anonymous
no there is no graph just multiple choice: Month 6 Month 5 Month 4 Month 3
anonymous
  • anonymous
just letting you know 2x is \[2x\] and 2^x is \[2^x\]
anonymous
  • anonymous
so is \[f(x)=2^x\]
anonymous
  • anonymous
so what would i have to do??????? @Shalante
anonymous
  • anonymous
write me the f(x) and g(x) equation on the word problem.
anonymous
  • anonymous
f(x) = 2x and g(x) = 4x + 12.
anonymous
  • anonymous
for the second problem, you wrote the equation wrong, so I asked you to draw it out. I am sure you wrote down the function to the 3rd problem (word problem) wrong also Did you see your mistake for the second problem you wrote down earlier?
anonymous
  • anonymous
no
anonymous
  • anonymous
You wrote down 3(2)x for the first choice. It is supposed to be 3(2)^x You see the arrow between 2 and x. That represents the x is going up making it an exponent.
anonymous
  • anonymous
yea i see that now
anonymous
  • anonymous
3(2)x is 3 times 2x 3(2)^x is \[3(2)^x\]
anonymous
  • anonymous
the 3rd problem is saying at what x is f(x)=2x greater than g(x)=4x+12 f(x) can never be greater than g(x). You probably wrote the equation wrong..
anonymous
  • anonymous
Probably forgot exponent sign.
anonymous
  • anonymous
yea i wrote that wrong
anonymous
  • anonymous
ill rewrite the 3rd question
anonymous
  • anonymous
The balance in two separate bank accounts grows each month at different rates. The growth rates for both accounts are represented by the functions f(x) = 2x and g(x) = 4x + 12. In what month is the f(x) balance greater than the g(x) balance?
anonymous
  • anonymous
@Shalante
anonymous
  • anonymous
Still does not make sense -_- Can you write f(x) and g(x) in draw mode
anonymous
  • anonymous
|dw:1439597961464:dw|
anonymous
  • anonymous
for f(x) 2 has an exponent of x and g(x) does not have an exponent of x
anonymous
  • anonymous
Look at the f(x) between your draw mode and what you wrote. You did not see your mistake..
anonymous
  • anonymous
Remember the rules I told you when writing an exponent. Now write f(x) without draw mode.
anonymous
  • anonymous
this time i wrote it exactly how the question gave it to me
anonymous
  • anonymous
Now write f(x) without draw mode.
anonymous
  • anonymous
do you think you can just help me because i am taking an exam
anonymous
  • anonymous
I am helping. You are not paying attention.
anonymous
  • anonymous
Scroll back up and read everything I wrote again until you understand.
anonymous
  • anonymous
ok nevermind i found the answer but thanks anyways
anonymous
  • anonymous
No problem!

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