MATHEMATICS HIGH SCHOOL

Convert 21.7 kilometers to centimeters.​

Answers

Answer 1
Answer:

Step-by-step explanation:

Notice that 1km = 1000m = 100000cm.

Therefore 21.7km = 2170000cm.
Answer 2
Answer:

Answer:

2170000 cm

Step-by-step explanation:

21.7 k/m × 10³ × 10²

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The rules for subdividing in a topic outline are different from the rules for subdividing in a sentence outline.. . True. False

Answers

That statement is true

Since topic is the foundation of the whole writing, subdividing it might cause a whole change through the entire writing, so we have different rules compared to subdividing a sentence

hope this helps

Answer:

TRUE

Step-by-step explanation:

A pile of sand has a weight of 90kg.The same is put into a small bag, a medium bag and a large bag in the ratio of 2:3:7.Work out the weight of sand in each bag

Answers

Remark

This requires some sort of constant that each of the ratio members is multiplied by.

Call the constant x

Equation

2x + 3x + 7x = 90 Add the left hand side

Solution

12x = 90 Divide by 13

x = 90 /12

x = 7,5

Answer

2x = 2 * 7.5

2x = 15

3x = 22.5

7x = 52.5

Sum = 90 as it should be

What is the product of a positive number and a negative number? positive
negative
It depends on the higher number.
There is not enough information

Answers

negative

basically
negative means change sign
positive means do nothing

change sign times do nothing=change sign=negative

basically
(+)(+)=(+)
(-)(-)=(-)
(+)(-)=(-)
(-)(+)=(-)
and

(+)/(+)=(+)
(-)/(-)=(-)
(+)/(-)=(-)
(-)/(+)=(-)

answer is negative

Could anyone help me understand this problem?"Find the perimeter of the figure, where AC=26, AD=BF, and D is the midpoint of AC. Round your answer to the nearest tenth."

Answers

It seems you will have to use a LOT of trigonometric calculations.
Line AC = 26 
Line AD = 13 = Line DC = 13
Line BF = 13

Angle ABC = Angle GBF = Angle FBH = 55 degrees each

cosine 40 = 13 (Line AD) / Line AE  
Line AE = 13 / 0.76604  = 16.97

tangent 40 = ED / AD = ED / 13
Line ED = 0.8391 * 13 = 10.908

Line DC =13
 
Angle ABC = 55 degrees
tangent(55) = 26 / AB
AB = 26 / 1.4281  = 18.206

Well, that's about half the calculations.
(As I said it's a lot of work).


The vertices of a quadrilateral ABCD are A(4, 8), B(10, 10), C(10, 4), and D(4, 4). The vertices of another quadrilateral EFCD are E(4, 0), F(10, -2), C(10, 4), and D(4, 4). Which conclusion is true about the quadrilaterals? (5 points)A.The measure of their corresponding angles is equal.
B.The ratio of their corresponding angles is 1:2.
C.The ratio of their corresponding sides is 1:2
D.The size of the quadrilaterals is different but shape is same.

Answers

ABCD are A(4, 8), B(10, 10), C(10, 4), and D(4, 4).
EFCD are E(4, 0), F(10, -2), C(10, 4), and D(4, 4). 

After plotting the points, the conclusion that is true about the quadrilaterals is "A.The measure of their corresponding angles is equal." ABCD is just a reflection of EFCD.

Answer:

A.The measure of their corresponding angles is equal.

Step-by-step explanation:

I got it right on a FLVS test

Which statements are true? Check all that apply.A sphere has no faces.
A prism must have a triangular or rectangular base.
A triangular prism has 2 rectangular bases and 4 triangular lateral faces.
A square pyramid must have lateral faces that are squares.
The lateral surface of a cylinder is in the shape of a rectangle when unrolled.

Answers

The true statement about shapes are as follows;

  • A sphere has no faces.
  • The lateral surface of a cylinder is in the shape of a rectangle when unrolled

Facts about three dimensional shapes.

A sphere is rounded three dimensional shape. The volume is represented as follows;

volume = 4 / 3 πr³

where

  • r = radius

Therefore, a sphere has no faces.

A cylinder is a three dimensional figure . The volume is as follows;

volume = πr²h

where

  • h = height
  • r = radius

Hence, the lateral surface of a cylinder is in the shape of a rectangle when unrolled

learn more on shapes here: brainly.com/question/24090207

#SPJ2

Answer:

A sphere has no faces && the lateral surface of a cylinder is in the shape of a rectangle when unrolled

Step-by-step explanation:

I got it right on edg
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