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Delicious77 [7]
3 years ago
13

What is the image of the point (-2, 4) under a 90° rotation about the origin?

Mathematics
1 answer:
Anon25 [30]3 years ago
5 0

Answer:

(- 4, - 2 )

Step-by-step explanation:

Under a rotation about the origin of 90°

a point (x, y ) → (- y, x ) , then

(- 2, 4 ) → (- 4, - 2 )

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Mike is building storage boxes. Each box will have a length of 5 feet, a width of 412 feet, and a height of 312 feet. A pint of
alex41 [277]
The pints of paint that Mike needs to buy in order to paint 4 boxes is 9 pints.



How many pints is needed?


The first step is determine the total surface area of a box.


Total surface area of a cuboid = 2 (lw + wh + lh)


where:
l = length
w = width
h = height


2 x[ (5 x 9/2) + (9/2 x 7/2) + (5 x 7/2) ]
2 x ( 45/2 + 63/4 + 35/2) = 111.5ft


The second step is to determine the total surface area of 4 boxes:


111.5 x 4 = 446


Now, divide 446 by 50


446 / 50 = 9 pints
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1 year ago
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Here is a centimetre square grid.<br> Draw a shape with an area of 11cm squared.
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3 years ago
Which graph represents a linear function?
pshichka [43]

Answer:

y + 2x = 10 (third option)

Step-by-step explanation:

We can see that every time x increases by one, y increases by -2, meaning that the slope is -2.

We also know that the y-intercept is 10 because that is the value of y when x is equal to 0.

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y = -2x + 10

If you look at the third option, that equation is just a rearranged form of our equation (y + 2x = 10).

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2 years ago
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