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igor_vitrenko [27]
3 years ago
13

How to solve linear equations 12 = y + (-2)

Mathematics
2 answers:
seropon [69]3 years ago
8 0
Is like 14 + -2 = 12
alekssr [168]3 years ago
7 0
12 = y + (-2)

12 = y - 2

12 + 2 = y - 2 + 2

y = 14

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Mei Su had 80 coins. She gave most of them to her friends in such a way that each of her friends got at least one coin and no tw
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Answer: 12 friends.

Step-by-step explanation:

the data we have is:

Mei Su had 80 coins.

She gave the coins to her friends, in such a way that every friend got a different number of coins, then we have that:

The maximum number of friends that could have coins is when:

friend 1 got 1 coin

friend 2 got 2 coins

friend 3 got 3 coins

friend N got N coins

in such a way that:

(1 + 2 + 3 + ... + N) ≥ 79

I use 79 because "she gave most of the coins", not all.

We want to find the maximum possible N.

Then let's calculate:

1 + 2 + 3 + 4 + 5 = 15

15 + 6 + 7 + 8 + 9 + 10 = 55

now we are close, lets add by one number:

55 + 11 = 66

66 + 12 = 78

now, we can not add more because we will have a number larger than 80.

Then we have N = 12

This means that the maximum number of friends is 12.

5 0
3 years ago
The graph of f(t) = 6 x 2^t shows the value of a rare coin in year t. What is the meaning of the y-intercept?
Flauer [41]
When the graph intersects the y-axis, it means it's x-coordinate is 0, or t = 0.
Hence, f(t) = 6 × 2^0 = 6.
y = 6 at y-intercept.
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3 years ago
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The answer is 80.24.
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Step-by-step explanation:

its just too hard sorry man

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