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1.A local bank has a debit card that gives a $3 reward each month you use your card for $50 or more in purchaces. Write an equation relating rewards earned,y, to total monthly purchaces, x. Give the domain of this function.
2. A local credit union has a debit card that rewards 3% of your total monthly purchases. Write an equation relating rewards earned,y, to total monthly purchases, x. Give domain of this function.
 one year ago
 one year ago
1.A local bank has a debit card that gives a $3 reward each month you use your card for $50 or more in purchaces. Write an equation relating rewards earned,y, to total monthly purchaces, x. Give the domain of this function. 2. A local credit union has a debit card that rewards 3% of your total monthly purchases. Write an equation relating rewards earned,y, to total monthly purchases, x. Give domain of this function.
 one year ago
 one year ago

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satellite73Best ResponseYou've already chosen the best response.3
the second one is easiest i think you get 3% of your monthly purchases, so if you call your monthly purchases \(x\) then you get \(y=0.03x\)
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
it has no lower limit, so i would say the domain is \((0,\infty)\) or "positive numbers"
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
Honestly, any input would be appreciated. I'm totally clueless!
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
this is not quite accurate, since you cannot spend say \(\pi\) dollars so maybe the domain is positive integers
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
how fancy is this math class?
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
maybe you can get away with saying "positive numbers"
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
It's just Algebra 1
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
okay so you probably don't have to be so picky for the second one you can use \(y=0.03x\) and say the domain is positive numbers
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
for the first one, it is really \[y= \left\{\begin{array}{rcc} 0 & \text{if} & x <50\\ 3& \text{if} & x \geq50 \end{array} \right. \]
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
but that might be too fancy as well, so maybe you can just say \(y=3\) if \(x\geq50\) or maybe even just say \(y=3\) and the domain is \(x\geq 50\)
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
Okay, thank you so much!! I've been stuck on math problems all night. I still have 3 more to go :(
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
go ahead and post, i will look, or just ask here
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
I'll type it here, if that's alright
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
go ahead, i will answer if i can
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
1. Abigail orders a large 2 topping pizza for $14 and a medium 1 topping pizza for $10. If all coats of a medium pizza are 80% of a similar large pizza, find rhe price of a large plain cheese and the cost of each large pizza topping.
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
whoa this is going to take a second not too long though
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
You don't have to do it if you don't want to! I understand.
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
oh no we can definitely do this for sure
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
Alrighty, thank you so much.
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
we can call the price of the topping \(y\) and the price of the large plain pizza \(x\) so the price of the medium plain pizza is \(0.8x\)
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
then the first part tells you \[x+2y=14\] and the second part say \[.8x+y=10\]
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
now before we solve this, i can make a good guess, which is that \(x=10\) and \(y=2\)
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
because \(10+2\times 2=14\) and \(0.8x\times 10+2=8+2=10\)
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
i am assuming of course that the toppings for the large and small pizza are the same if they are not the same you cannot solve the problem
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
in any case to solve \[x+2y=14\]\[.8x+y=10\] multiply the second equation by 2 and add you get \[x+2y=14\] \[1.6x2y=20\] \[.6x=6\] \[x=6\div .6=60\div 6=10\]
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
so it is right large pizza is $10, medium is $8, toppings are $2
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
Thank you so much! You make the problems seem so much easier. I might actually get some sleep tonight for school tomorrow!
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
yw any more or are you done?
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
I have one more.
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
It's the hardest one
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
Nathan wants to go to a hockey game with friends. Tickets are $18, but students can get discounted tickets for $12. They want to spend no more than $80, including $8 for parking. The vehicle they will take can only hold 7 people. Write and graph (it's a regualr coordinate graph) a system of foir inequalities modeling their possible ticket purchases. Let x= number of student tickets and y= number of regular tickets
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
one thing we know is that \(x+y\leq 7\)
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
because at most 7 people can go
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
we also know that they are going to pay $8 for parking, leaving \(808=\$72\) for tickets and so \(12x+18y\leq 72\)
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
i think the other two inequalities are the easy ones, both \(x\geq 0\) and \(y\geq 0\) which just means you are in quadrant 1
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
can you graph \(x+y=7\)?
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
dw:1363921714846:dw
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
if \(x=0\) you get \(y=7\) so \((0,7)\) is on the graph, and similarly \((7,0)\) is on the graph plot the points, connect the dots
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
you got it from the picture?
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
I can't see your drawing because I'm on my phone, I can't access a computer.
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
I know how to graph points, so I should be fine
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
Whatt do I do next?
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
the line \(12x+18y=72\) contains the points \((0,4)\) and \((6,0)\) so plot those points as well and connect the dots
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
then shade everything in quadrant 1, and below those two lines
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
i obviously cannot draw it here for you to see, but that is what you have to do
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
Yes, I understand
 one year ago

satellite73Best ResponseYou've already chosen the best response.3
then i guess you are done any point that is shaded in the picture is possible
 one year ago

KaylaClemens15Best ResponseYou've already chosen the best response.0
Ok, sweet. Thank you very much for all your time and help. Have a nice night! :)
 one year ago
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