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Galina-37 [17]
3 years ago
6

Tính nhẩm: a, 138^2-38^2 b, (10^2+8^2+6^2+4^2+2^2)- (9^2+7^2+5^2+3^2+1^2) PLZZZ, giúp vs

Mathematics
1 answer:
Stels [109]3 years ago
3 0

Answer:

is there a question?

Step-by-step explanation:

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Explain how to decide which is a better value. 4 greeting cards for $10 and 6 greeting cards for $14.
xxMikexx [17]

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I dont know if this is supposed to be solved a certain way for a class, but as a bargain shopper, this is what I would do to figure out the best value.

Step-by-step explanation:

First divide $10 by 4:   10.00/4=2.5 or $2.50 per card

Then, divide $14 by 6:  14.00/6=2.3333333 so about $2.33 per card

Now, just look at the two answers and see which one is less.

If you buy 4 cards for $10, you will pay $2.50 for each card and if you buy 6 cards for $14, you will pay about $2.33 for each card. Therefore, the better value would be the 6 cards for $14.

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3 years ago
Help asap will give brainliest to whoever answer's correctly.
nydimaria [60]

Answer:

cant see the image

Step-by-step explanation:

8 0
3 years ago
Use elimination to solve for x and y:
vredina [299]

Step-by-step explanation:

5x+4y=23

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8 0
3 years ago
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Write a decimal between .5 and .75 then write is as a fraction in simplest form and as a percent
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