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3 years ago

If pentagon ABCDE is rotated 180° around the origin to create pentagon A′B′C′D′E′, what is the ordered pair of point D′?

Mathematics

2 answers:

Softa [21]3 years ago

4 0

Answer:

Its A (-1,2)

Step-by-step explanation:

180 degree rule is (-x,-y)

point D is (1,-2)

Since the two is already a negative you have to turn it into a positive so that's why it would be (-1,2).

Vesna [10]3 years ago

3 0

Can u include a picture?

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A hovercraft takes off from a platform it’s height (in meters), x seconds after takeoff, is modeled by

yulyashka [42]

9514 1404 393

Answer:

81 m

Step-by-step explanation:

Since x is seconds after takeoff, the value of x at takeoff is 0. You are being asked to find H(0).

H(0) = -3(0 -3)^2 +108 = -3(9) +108 = 81

The height of the hovercraft at the time of takeoff is 81 meters.

8 0

2 years ago

Share £480 in the ratio 2:3:7

aleksandr82 [10.1K]

£480

2:3:7 = 2+3+7 = 12

2
--- 0f £480 = £80
12

3
--- of £480 = £120
12

7
--- of £480 = £280
12

answer = £80 : £120 : £280

5 0

3 years ago

Brainliest and 30 points please help

kolbaska11 [484]

Answer:

22. Perimeter = 52 units

Area = 160 Square Units

23. Notation form : $2 \times 10^{5}$

Standard Form : 200000

Step-by-step explanation:

22.

The formula for perimeter is

P = 2 (length + Width )

= 2 ( 2x+3x+1)

= 2(5x+1)

The Formula for Area of a rectangle is

A= length x width

A= $2x \times (3x+1)$

A= $6x^2+2x$

Now we have to find the Perimeter and Area for x = 5

P = 2(5 x 5 +1)

P= 2(26)

P=52 units

A= 6 x 5 x 5 + 2 x 5

A= 150 + 10

A= 160 square units

23.

A. By using rule of exponents , we can determine that both the results will be same.

Miriam's calculation

$\frac{2.8 \times 10^{9}}{1.4 \times 10^{4}}$

$\frac{2.8}{1.4} \times 10^{9-4}$

$2 \times 10^5$

Priya's calculation

$\frac{2.8 \times 10^{2}}{1.4 \times 10^{-3}}$

$\frac{2.8}{1.4} \times 10^{2-(-3)}$

$2 \times 10^5$

Standard notation

$2 \times 10^5 = 200000$

4 0

3 years ago

The Wilsons traveled the 2400 miles of Route 66 from Chicago,IL to Santa Monica, CA. If their total driving time was 50 hours, w

Zolol [24]

Answer:

48 miles per hour

Step-by-step explanation:

If they traveled 2400 miles and the total driving time was 50 hours, divide 2400/50 in order to find how many miles they drove per hour.

4 0

2 years ago

Read 2 more answers

1. Write a survey question for which you would expect to collect numerical

Yakvenalex [24]

Answer:

How many siblings do you have?

I hope this helps you out :)

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3 years ago