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bazaltina [42]
3 years ago
15

C

Mathematics
1 answer:
Y_Kistochka [10]3 years ago
8 0

Answer:

A'(-4,-4), B'(-4,-1), C(-2,-3), D(-1,-1)

Step-by-step explanation:

After counterclockwise 90 degree rotation X and Y coordinate swap and X coordinate changes its sign

Rotation of 90° (CounterClockwise) (x, y) ----->(-y, x)

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Find the value of x such that the data set has the given mean.
sineoko [7]

Answer:

127

Step-by-step explanation:

112 × 6 = 672

100 + 121 + 105 + 111 + 108 = 545

672 - 545 = 127

6 0
3 years ago
PLEASE HELP !ASAP! WILL MARK BRAINLIEST
poizon [28]

Answer:

40

Step-by-step explanation:

cause 40+320=360

or subtract 360-320=40

brainliest?

3 0
3 years ago
The price of a cycle is reduced by 25 per cent. The new price is reduced by a further 20 per cent. The two reductions together a
pantera1 [17]
It should be 40 percent.

You can think of it as starting with 100 as in 100 dollars or 100 tic tacs

If you take away 25%, you take away 25 tic tacs and now you only have 75.

From your 75, you take away 20% which is equal to 15. 75- 15=60

If you look at the end result of 60, you can see that that is 100 - 40 so 40% of the total was taken off
5 0
3 years ago
Solve x2 + 2x = 4 for x by completing the square. x equals plus or minus square root of 5 plus 1 x equals plus or minus square r
steposvetlana [31]

Answer:

x equals plus or minus square root of 5 minus 1

Step-by-step explanation:

we have

x^{2} +2x=4

Divide by 2 the coefficient of the x-term

2/2=1

squared the number

1^2=1

Adds both sides

x^{2} +2x+1=4+1

x^{2} +2x+1=5

Rewrite as perfect squares

(x+1)^{2}=5

take the square root both sides

x+1=(+/-)\sqrt{5}

x=(+/-)\sqrt{5}-1

therefore

x equals plus or minus square root of 5 minus 1

4 0
3 years ago
which of the following best describes 4^2/3? a. sq root of 16, b. cube root of 4, c. sq root of four, d. cube root of 16
son4ous [18]

Answer: D) cube root of 16

================================================

Explanation:

The rule we use is

x^{m/n} = \sqrt[n]{x^m}

In this case, x = 4, m = 2 and n = 3.

So,

x^{m/n} = \sqrt[n]{x^m}\\\\\\4^{2/3} = \sqrt[3]{4^2}\\\\\\4^{2/3} = \sqrt[3]{16}\\\\\\

Showing that the original expression turns into the cube root of 16.

4 0
3 years ago
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