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2 years ago

8Which rate is equivalent to 72 over 9

Mathematics

2 answers:

hichkok12 [17]2 years ago

8 0

Answer:

Step-by-step explanation:

$\frac{72}{9}$ = 8

otez555 [7]2 years ago

3 0

Answer:

72/9 is equivalent to 8/1 is the answer.

Step-by-step explanation:

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Mumz [18]

Answer:

(7,2)45 units sqrd

Step-by-step explanation:

45 units sqrd because its a 5x9

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Alexus [3.1K]

Answer:

20=91.35*2

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21=17+18+15 vs 17+15+18

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2 years ago

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ASHA 777 [7]

Answer:

(-6,4)

Step-by-step explanation:

The equations are:

$x^2+4y^2=100\\4y-x^2=-20$

Solving for x^2 of the 2nd equation and putting that in place of x^2 in the 2nd equation we have:

$4y-x^2=-20\\x^2=4y+20\\-------\\x^2+4y^2=100\\4y+20+4y^2=100$

Now we can solve for y:

$4y+20+4y^2=100\\4y^2+4y-80=0\\y^2+y-20=0\\(y+5)(y-4)=0\\y=4,-5$

So plugging in y = 4 into an equation and solving for x, we have:

$x^2=4y+20\\x=+-\sqrt{4y+20} \\x=+-\sqrt{4(4)+20} \\x=+-\sqrt{36} \\x=6,-6$

So y = 4 corresponds to x = 6 & x = -6

The pairs would be

(6,4) & (-6,4)

<u><em>we see that (-6,4) falls in the 2nd quadrant, thus this is the solution we are looking for.</em></u>

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2 years ago