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Marysya12 [62]
3 years ago
13

How would u do this w/o plugging in the numbers?

Mathematics
1 answer:
nordsb [41]3 years ago
3 0
First isolate y for each equation so that y = x^2 + 3 and y = 2x^2 + 2 now set those equal to eachother and solve for x, 

x^2 + 3 = 2x^2 + 2
= √x^2 = <span>√1
x is +- 1

then plug in x for one of the original equations y = 1^2 + 3 = 4

x = +-1
y = 4</span>
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20 POINTS!
White raven [17]

Answer:

Down here ↓↓↓↓↓↓

Step-by-step explanation:

13:

It is a function, notice that if you draw a vertical line anywhere, it doesn't pass two points.

Domain : All real numbers (x-values)

Range : 2 (y-values)

14:

Not a function, if you draw a vertical line through one point, it will hit two others.

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Domain: All real numbers

Range: All real numbers

16:

Not a function, two points in one line

Domain : -5 ≤ x ≤ 5

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free points?????????

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