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zaharov [31]
3 years ago
10

If x-y=10 and x squared-y squared =40 then y=?

Mathematics
2 answers:
77julia77 [94]3 years ago
6 0
Solve for y in the first equation
-y=-x+10
y=x-10

Now substitute y in the second equation
x^2-(x-10)^2=40
x^2-(x^2-20x+100)=40
20x-100=40
20x=140
x=7

Plug the value of 7 in to any of the equations
7-y=10
y=(-3)

Final answer: y= -3
melomori [17]3 years ago
5 0
12 I know I gave you the wrong answer
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This circle graph shows how Jimmy spent his time during the last 24 hours.
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Answer:

Excess time = 1.2 hour

Step-by-step explanation:

Given:

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Computation:

Watching TV percent = 100% - Talking on phone - Sleeping - Going to school - Studying -  Studying - Eating

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3 0
3 years ago
Four-thirds times a sum of a number and 8 is 24. what is the number
Anettt [7]
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4 years ago
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astraxan [27]

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8.5 per pound

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3 years ago
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WARRIOR [948]

Answer:

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Step-by-step explanation:

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The ferris wheel travelled 434.717 ft.

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3 years ago
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