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Anna [14]
3 years ago
11

Help me with my math please

Mathematics
2 answers:
Olin [163]3 years ago
8 0
Every thing he said
monitta3 years ago
3 0

Answer:

Volume of a cylinder = πr²h

Given

V=81π

r=3

find h

Making h the subject

h= V/πr² = 81π/π(3)²

h= 81/9

h= 9cm

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84/100 into a percentage
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84/100 converted to percent is 84%.
4 0
3 years ago
Read 2 more answers
Brianna is constructing a raised flower bed in the shape of a rectangle. The length of the flower bed is equal to the width plus
inessss [21]
I think the answer is 5 feet because 2(2+5)= 4+10=14. So the missing length is 5 feet.
4 0
3 years ago
Triangle QRS is dilated according to the rule DO,2 (x,y).
Gemiola [76]

The correct options about the dilation are; Options A, B and E

<h3>How to interpret Dilated Objects?</h3>

From the given information, find attached a dilated image.

The scale factor is 2

QRS → Q'R'S' = (x,y) → 2(x,y)

The coordinates of ∆QRS are; Q (-3, 3), R (2, 4) and S (-1, 1)

To get the coordinates of Q'R'S', we would multiply each coordinate of the original triangle by the scale factor of 2 since the dilation is from the origin. In other words, each vertex of QRS is multiplied by 2 to get each of the vertex of Q'R'S'.

2(x, y) = (2x, 2y)

The coordinates of ∆Q'R'S' becomes: Q' (-6, 6), R' (4, 8), S' (-2, 2)

To determine the statements that are true about the image ΔQ'R'S,

Starting with ΔABC, we would draw the dilation image of the triangle with a center at the origin and a scale factor of 2.

A) DO, 2 (x, y) = (2x, 2y)

A dilation about the origin with a scale factor 2 is described using the above notation.

Q' = 2(-3,3) = [2(-3), 2(3)] = (-6, 6)

R' (4, 8) = 2(2,4) = [2(2), 2(4)] = (4, 8)

S' (-2, 2) = 2(-1,1) = [2(-1), 2(1)] = (-2, 2)

Thus Option A is correct.

B) Side Q'S' lies on a line with a slope of -1

Q' (-6, 6)

S' (-2, 2)

coordinate (x, y)

Slope = m = (change in y)/(change in x)

m = (6-2)/[-6-(-2)]

m = 4/(-6+2) = 4/-4

m = -1

Option B is correct

c) QR is longer than Q'R'

Length of QR (-3 to 2) = 5

Length of Q'R' (-6 to 4) = 10

QR is not longer than Q'R'

Option C is false

d) The vertices of the image are closer to the origin than those of the pre-image.

From the diagram, the vertices of the preimage are closer to the origin than those of the dilation image.

Option D is False

e) The distance from Q' to the origin is twice the distance from Q to the origin.

The distance from Q' to the origin (6 to 0) = 6

The distance from Q to the origin (3 to 0) = 3

The distance from Q' to the origin = 2(the distance from Q to the origin)

Option E is correct.

Read more about Dilated Objects at; brainly.com/question/10253650

#SPJ1

8 0
2 years ago
Please help you guys
Svetach [21]

Answer:

It should be 21.1

Step-by-step explanation:

5 0
3 years ago
Please helppp!! ill give brainliest &lt;333
hichkok12 [17]

Answer: Area: D. 32\frac{6}{20}

Step-by-step explanation:

Step 1: Convert the Expressions

4\frac{3}{4}*6\frac{4}{5}

\frac{19}{4}*\frac{34}{5}

Step 2: Reduce the Numbers

\frac{19}{4}*\frac{34}{5}

\frac{19}{2}*\frac{17}{5}

Step 3: Multiply

\frac{19}{2}*\frac{17}{5}

\frac{323}{10}

Step 4: Simplify

\frac{323}{10}

32\frac{6}{20}

Please mark brainliest if this helped! :)

4 0
3 years ago
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