3 years ago

Pleeeeeaaaasssseee hellppppp! I don't understand this too much..

Mathematics

1 answer:

Arlecino [84]3 years ago

5 0

I think the answer is B because the equation is 1000 divided by N and N can be the dogs. SO the answer is B

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Simplify the expression 1x(-2+3)x(-9+7)=

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Solve algebraically the simultaneous equations X^2 + Y^2 =25 Y-2X = 5

Georgia [21]

Answer:

Therefore the solutions are

$x=0\\and\\ y =5\\\\Or\\\\x=-4\\and\\y=-3$

Step-by-step explanation:

Given:

$x^{2} + y^{2} =25$ .........( 1 )

$y-2x = 5\\y=2x+5$ ................( 2 )

To Find:

x = ?

y = ?

Solution:

Substituting ' y ' in Equation 1 we get

$x^{2}+(2x+5)^{2} =25$

Using identity (A+B)²=A²+2AB+B² we get

$x^{2}+4x^{2}+20x+25=25\\\\5x^{2}+20x=0\\5x(x+4)=0\\5x=0\ or\ x+4=0\\x=0\ or\ x= -4$

Now Substitute x =0 in equation 2 we get

$y=2\times 0+5=5$

Now Substitute x =-4 in equation 2 we get

$y=2\times -4+5=-3$

Therefore the solutions are

$x=0\\and\\ y =5\\\\Or\\\\x=-4\\and\\y=-3$

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4 years ago

jose brought 2 movie tickets and a box of popcorn the popcorn cost $6 and he spend a total of $24 how much did each ticket cost

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Each ticket costs 8 dollars

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2 years ago

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