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artcher [175]
3 years ago
15

X + 2y = 12 and 7x + 2y = 0 in their proper forms

Mathematics
1 answer:
Georgia [21]3 years ago
3 0

Answer:

Step-by-step explanation:

we have to get y by itself here i think

so

x + 2y = 12

2y = -x + 12

y = -1/2 + 6

7x + 2y = 0

2y = -7x

y = -3.5x

hope this helps <3

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<u>Check:</u>

In the 1st hour, they sold (101/2 + 1/2) = 102/2 = 51.  They had 50 left.

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The key to solving this one is to work it backwards.

-- They had 19 peaches left at the end of the day.

-- During the final hour, the 1/5 of a peach that they sold left them with 19,
so they had 19-1/5 before they sold the 1/5 of a peach.
The 19-1/5 was 4/5 of what they had at the beginning of the final hour.
So, at the beginning of the final hour, they had (5/4)x(19.2) = 24 .

-- During the 3rd hour, the 3/4 of a peach that they sold left them with 24,
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The 24-3/4 was 3/4 of what they had at the beginning of that hour.
So, at the beginning of the 3rd hour, they had (4/3)x(24.75) = 33 .

Do the same for the 2nd hour.

Then do the same for the 1st hour.

And you'll work your way back up to 101 peaches.


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