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3 years ago

ASAP HELP PLZZZZ What is the image of the point (9, -2) after a rotation of o counter-clockwise about the origin?

Mathematics

2 answers:

antoniya [11.8K]3 years ago

5 0

I think its (2, 9) :)

Zolol [24]3 years ago

4 0

Answer:

It should be (2,9).

Step-by-step explanation:

If you rotate it counter clockwise, the x value and y value switch numbers and they will both become postive.

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How many sides does this regular polygon have? <br>Pls help

galina1969 [7]

Answer:

9 sides

Step-by-step explanation:

7y + 2y = 180

9y = 180

y =20

so, 2y, the exterior angle is 2 x 20 = 40

Divide 360 by 40 = 9

3 0

3 years ago

Look at the image please helppp

balu736 [363]

Answer:

Option A. one rectangle and two triangles

Option E. one triangle and one trapezoid

Step-by-step explanation:

step 1

we know that

The area of the polygon can be decomposed into one rectangle and two triangles

see the attached figure N 1

therefore

Te area of the composite figure is equal to the area of one rectangle plus the area of two triangles

$A=(8)(4)+2[\frac{1}{2}((8)(4)]=32+32=64\ yd^2$

step 2

we know that

The area of the polygon can be decomposed into one triangle and one trapezoid

see the attached figure N 2

therefore

Te area of the composite figure is equal to the area of one triangle plus the area of one trapezoid

$A=\frac{1}{2}(8)(4)+\frac{1}{2}((4+8)(8)=16+48=64\ yd^2$

7 0

3 years ago

Divide the number 480 in a ratio of 3:5

Schach [20]

If it is a ratio of 3:5 you are dividing 480 into 8 parts (3+5).

So divide 480 by 8: 480/8 = 60

Then the ratio is (3x60):(5x60) or 180:300

To check it is correct, add up the two parts to see that they come to 480:

180+300 = 480. All good.

Hope this helps

6 0

3 years ago

Read 2 more answers

Aubrey is making cone-shaped hats for a birthday party. She mistakenly thinks that she will need about 104 square inches of pape

Mashutka [201]

Answer:

Option C. is the correct option.

Step-by-step explanation:

Given question is incomplete; here is the complete question.

Aubrey is making cone-shaped hats for a birthday party. She mistakenly thinks that she will need about 104 square inches of paper for each hat.

Cone with diameter six inches and slant height eight inches.

What is the correct amount of paper Aubrey will need per hat? Explain Aubrey’s mistake. Use 3.14 for π and round to the nearest inch.

A. About 70 in2; Aubrey found the surface area of the cone, but did not include the base.

B. About 70 in2; Aubrey used the diameter instead of the radius to find the surface area of a cone.

C. About 75 in2; Aubrey found the surface area of the cone and included the base.

D. About 75 in2; Aubrey found the volume of the cone instead of the surface area.

Lateral surface area of a cone = Paper required to for each hat

Lateral surface area = πrl

Here r = radius of the cone

l = lateral height of the cone

Lateral surface area = π(3)(8)

= 75.36 square inches

≈ 75 square inches

Therefore, total paper required for each cap is about 75 square inches.

Total surface area of the cone (Lateral area + Area of the base)

= πr(r + l)

= 3.14(3)(3 + 8)

= 103.62

≈ 104 square inches.

Aubrey did a mistake by finding the total surface area (including base area) of the cone instead of lateral surface area.

Therefore, option C. is the correct option.

7 0

3 years ago

Two years of local Internet service cost $685, including the installation fee of $85. What is the monthly fee?

AnnZ [28]

685-85=600
1 year =12 months
12 multiply by 2 =24
600 divided by 24=25
answer=25

8 0

3 years ago

Read 2 more answers