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igor_vitrenko [27]
3 years ago
8

Solve using elimination 12c+5c=190 4c+9c=166

Mathematics
1 answer:
Alexandra [31]3 years ago
3 0

Answer:

1) c=11.1764705882

2)c=12.7692307692

Step-by-step explanation:

17c=190

c=11.1764705882

13c=166

c=12.7692307692

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4 0
4 years ago
Maria needs to make a total of 80 deliveries this week. So far she has completed 48 of them. What percentage of her total delive
Amiraneli [1.4K]

What I always do to solve this, is find a common factor for each number first.

Usually 4 or 5 works best. I'll use 4.

4 goes into 80 20 times, which means that 4 = 5%  of 80.

If 4 = 5%, and 48 = 12 x 4,    then 48 must equal 60% of 80.

(Another way to solve this problem is:  simplify 48 / 80.  This simplifies to 3/5.

3/5 = 60%)!

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3 years ago
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