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-Dominant- [34]

2 years ago

5

Which ordered pair is a reflection of (3, 7) across the y-axis?

1 answer:

worty [1.4K]2 years ago

3 0

Answer:

(-3, 7)

Step-by-step explanation:

It is like putting a mirror on the y-axis. It is asking what point is the photo negative of the point, like a mirror. You see yourself in the mirror but everything is opposite. Your right hand is your left. So which point is the photo negative of (3, 7)? (-3, 7) Because it is only across the y-axis, the y value stays the same.

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makkiz [27]

For this case we have the following system of equations:

$8x-9y = -122\\-8x-6y = -28$

To solve, we add both equations:

$8x-8x-9y-6y = -122-28\\-15y = -150\\y = \frac {-150} {- 15}\\y = 10$

We find the value of "x":

$8x = -122 + 9y\\x = \frac {-122 + 9y} {8}\\x = \frac {-122 + 9 (10)} {8}\\x = \frac {-122 + 90} {8}\\x = \frac {-32} {8}\\x = -4$

The solution is (-4,10)

ANswer:

Option C

5 0

3 years ago

Find the best linear equation for the ordered pairs below.

kolbaska11 [484]

Answer:

y = -.075x +4.89

Step-by-step explanation:

The data set has almost no net slope, so the first equation is the most appropriate. (An absolute value function would be a much better fit.)

y = -.075x +4.89

4 0

3 years ago

Solve for y: 2x+3y=21

stealth61 [152]

Answer:

y = 7 - 2x/3

Step-by-step explanation:

Make the y alone, so 3y = -2x+21

Divide everything else by 3, so y = -2x/3 +7

You end with the answer of y= 7-2x+3

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3 years ago