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2 years ago

If x+y=10 and x-y =6 what is the answer of x cube - y cube fast

Mathematics

1 answer:

AfilCa [17]2 years ago

4 0

Answer:

x+y=10 which means that x=10-y

Replace 10-y in the other equation which gives you:

10-y-y=6

10-2y=6

-2y=-4

y=2

Replace 2 in any of the 2 equations same answer for both:

x+y=10

x+2=10

x=8

So,

${x}^{3} - y^{3}$

$= {8}^{3} - {2}^{3}$

=512-8

=504

Hope this helps!

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In a state's Pick 3 lottery game, you pay $1.35 to select a sequence of three digits (from 0 to 9), such as 366. If you select t

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c. If you win, what is your net profit?

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Note that if you do not win, then you lose the $1.35 you paid for joining the game.

d. Find the expected value.

The expected value is equal to the summation of all the possible outcomes (profits or losses) multiplied by their corresponding probabilities. So we calculate it as follows: