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rosijanka [135]
3 years ago
5

Mr. cringle found a box of handmade holiday greeting cards in his garage and decided to make more to send to all his friends. Af

ter 2 hours had passed, Mr.Cringle had a total of 30 cards. After 6 hours had passed, he had a total of 40 cards. At what rate is Mr.Cringle making greeting cards and how many cards were in the box he found?
Mathematics
1 answer:
yawa3891 [41]3 years ago
4 0
Well if he made 10 in 4 hours, that means he made 5 in 2 hours. after 2 hours he had 30 cards, so that means he started with 25 cards. Mr. Cringle is making 2 and 1/2 cards per hour.
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Step-by-step explanation:

If you look at the question in reverse you can backtrack your way through. Take 10 and instead of dividing, multiply it by 10, which is 60, add 6 instead of subtracting, which is 66, divide by 6 instead of multiplying, which is 11 and finally subtract 6 instead of adding, which is 5. Use five and try the question over to make sure you calculated correct.

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2 years ago
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3 years ago
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alisha [4.7K]

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3 years ago
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DerKrebs [107]

1) For each of these, keep in mind vertex form: f(x)=a(x-h)^2+k. With vertex form, a is the direction and width, h is the horizontal placement of the vertex, and k is the vertical placement. For the first one, notice that "a" is positive 1, so it faces up. This means that D, the one facing down, cannot be the answer. "h" is 1, so we will move the vertex to the right one unit (keep in mind (x-h), so if it were to be (h+3) you would move it to the left, not the right). "k" is -3, so we would move the vertex down 3 units. That said, the vertex should be at (1,-3) so the answer is C, or the one right below the first one.

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