anonymous
  • anonymous
The price of a gallon of unleaded gas was $2.81 yesterday. Today, the price rose to $2.87. Find the percentage increase. Round your answer to the nearest tenth of a percent
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
please hellllp
anonymous
  • anonymous
2.1 %
anonymous
  • anonymous
On Monday, a local hamburger shop sold a combined total of 450 hamburgers and cheeseburgers. The number of cheeseburgers sold was two times the number of hamburgers sold. How many hamburgers were sold on Monday?

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anonymous
  • anonymous
Did you understand how I did the last one? Why do you just want the answers? ha...u should try to understand. It would make things a lot easier on yourself. You're going to have to learn how to do problems like this on your own eventually.
anonymous
  • anonymous
well i'm doing this program for a class i have. i've been working for 3 days (and i mean all day) and it makes you do an assessment test. i'm doing most of them on my own...these are just the ones i can't figure out.
M
  • M
2.87-2.81 = 2.81x solve for x
anonymous
  • anonymous
M...that is correct. That's how you figure .021 and then multiplying 100 gives you the percent....do you understand that laurenlynn_07?
anonymous
  • anonymous
yes I understand
anonymous
  • anonymous
Okay. Well, for the cheeseburger problem....you know that the number of cheeseburgers plus the number of hamburgers is equal to 450. So, you can express that like this: x=number of cheesburgers and y=number of hamburgers...so, x+y=450...you also no that the number of cheeseburgers in two times as many hamburgers. So., you can write that like this: x=2y So, you have 2 equations that represent the problem: x+y=450 x=2y All you have to do is solve for each variable and and you get your answer. Do you understand that?
anonymous
  • anonymous
so in other words....(number of cheeseburgers)+2(number of cheeseburgers)=450...combining like terms we get 3(number of cheeseburgers)=450...so the number of cheeseburgers is 150.
anonymous
  • anonymous
okayyyyy... gotcha. thank you! that really helped me!! :)
anonymous
  • anonymous
Yep..glad you understand.

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