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3 years ago

Tell whether xy = 8 shows direct variation, inverse variation, or neither.

Mathematics

1 answer:

Nostrana [21]3 years ago

4 0

Answer:

inverse

Step-by-step explanation:

y = k/x indicates inverse variation, which is the same as xy = k

in this particular problem, k = 8

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12 1 point The mZCAD __degrees D 158 A D type your answer...

9966 [12]

bahala ka mag aral ka nga

6 0

3 years ago

Hyperloop, a new mode of travel, aims to reach a speed of 170 m/s . This is 50% less than the speed of sound.

mariarad [96]

Answer:

The speed of sound is $340\ m/s$

Step-by-step explanation:

Let

x-----> the speed of sound

we know that

$50\%=50/100=0.50$

$0.50x=170$

solve for x

$x=170/0.50=340\ m/s$

5 0

4 years ago

I don’t understand how to proof Cpctc or answer the questions

n200080 [17]

I think that first you need to understand what CPCTC is used for.

Let's start with the definition of congruent triangles.

Definition of congruent triangles
Two triangles are congruent if each side of one triangle is congruent to a corresponding side of the other triangle and each angle of one triangle is congruent to a corresponding angle of the other triangle.

A definition works two ways.
1) If you are told the sides and angles of one triangle are congruent to the corresponding sides and angle of a second triangle, then you can conclude the triangles are congruent.
2) If you are told the triangles are congruent, then you can conclude 6 statements of congruence, 3 for sides and 3 for angles.

Now let's see what CPCTC is and how it works.
CPCTC stands for "corresponding parts of congruent triangles are congruent."
The way it works is this. You can prove triangles congruent by knowing fewer that 6 statements of congruence. You can use ASA, SAS, AAS, SSS, etc. Once you prove two triangles congruent, then by the definition of congruent triangles, there are 6 congruent statements. That is where CPCTC comes in. Once you prove the triangles congruent, then you can conclude two corresponding sides or two corresponding angles are congruent by CPCTC. These two corresponding parts were not involved in proving the triangles congruent.

Problem 1.

Statements Reasons
1. Seg. AD perp. seg. BC 1. Given
2. <ADB & <ADC are right angles 2. Def. of perp. lines
3. <ADB is congr. <ADC 3. All right angles are congruent
4. Seg. BD is congr. seg CD 4. Given
5. Seg. AD is congr. seg. AD 5. Congruence of segments is reflexive
6. Tr. ABD is congr. tr. ACD 6. SAS
7. Seg. AB is congr. seg. AC 7. CPCTC

4 0

3 years ago

What is the volume of the prism?

babymother [125]

The volume of the prism is 1782

To find volume use base times height

To find base, use the triangle's area

The area of the triangle is 1/2(8×19) = 162

162 is the base amd the height is 11 so do 11 times 162

You should get 1782 as your answer

5 0

4 years ago

You randomly select an integer from 0 to 19 (inclusively) and then randomly select an integer from 0 to 24 (inclusively). What

Mila [183]

Answer:

The probability of selecting 5 both times is 0.002.

Step-by-step explanation:

We are given that you randomly select an integer from 0 to 19 (inclusively) and then randomly select an integer from 0 to 24 (inclusively).

And we have to find the probability of selecting 5 both times.

As we know that the probability of an event is given by;

Probability = $\frac{\text{Favorable number of outcomes}}{\text{Total number of outcomes}}$

Now, here between integer from 0 to 19 (inclusively);

Number of times 5 comes = 1

Total number of integers = 20

Similarly, between integer from 0 to 24 (inclusively);

Number of times 5 comes = 1

Total number of integers = 25

So, the required probability = $\frac{1}{20}\times \frac{1}{25}$

= $\frac{1}{500}$ = 0.002

Hence, the probability of selecting 5 both times is 0.002.

5 0

4 years ago