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Dmitry [639]
2 years ago
11

O nenes help please

Mathematics
1 answer:
rosijanka [135]2 years ago
6 0

Answer:

9 I think.

Step-by-step explanation:

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What is the image point of (2,7) after the transformation r y=-x R270?
Semmy [17]

Answer:

0

Step-by-step explanation:|-2 - (-1)| =

|-2 + 1| =

| -1 | =

1.

 

So, we're one unit away from y = -1.  If we're one unit ABOVE y=-1, we need to move the point to be one unit BELOW it instead.  And if we're one unit BELOW y = -1, we need to move the point to be one unit ABOVE it.  

 

Since the point has a y-coordinate of -2, its BELOW the line y = -1, by 1 unit.  Now we change the y-coordinate so its instead ABOVE y = -1, by 1 unit:

 

(y-coordinate of reflection line) + (number of units above that line) =

-1 + 1 =

0.

 

Our new y-coordinate is 0, so the point is now at

(7, 0).

 

A more mechanical, but less intuitive approach is as follows:  

Let L = the y-coordinate of the line, and

P = the y-coordinate of the point.

The new y-coordinate is 2L - P.

In this case, L = -1, and P = -2.  So we have

2L - P =

2(-1) - (-2) =

-2 -(-2) =

0.

5 0
2 years ago
If n is divided by 7 the remainder is 3. What is the remainder if 3n is divided by 7?
Keith_Richards [23]
So, if n Divided by 7 = 3 , then n must be 21, because if you do 3 x 7 it equals 21, so now we know n is 21, then that means its 3 x 21 divided by 7 which is 9. Hope i helped ^-^
5 0
3 years ago
What is the y intercept of the line given by the equation y=3x-11?
horrorfan [7]
The y-intercept is (0,-11), which is option C.
3 0
3 years ago
Read 2 more answers
$20 haircut ; 10% tip
Trava [24]

Answer:

22 dollars

Step-by-step explanation:

10% of $20= 2

20+2=$22

3 0
3 years ago
PLEASE ANSWER! WILL MARK BRAINLIEST!!
lord [1]

Answer:

Here you go.Hope this help!!

5 0
2 years ago
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