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vlabodo [156]
2 years ago
10

Help me please i wish i can get somehelp

Mathematics
1 answer:
USPshnik [31]2 years ago
4 0

Answer:

29. \frac{1}{3}

30. a) 32

b) Yes, the ratio will change 1 : 2.

Step-by-step explanation:

<em>Question 29.</em>

Given that:

Number of gold medals won by France = 11

Number of silver medals won by France = 9

Number of bronze medals won by France = 13

To find:

The ratio of gold medals won to the total number of medals won by France.

Solution:

First of all, we need to find the total number of medals won by France.

Total number of medals won = 11 + 9 + 13 = 33

The required ratio can be found as:

\dfrac{\text{Number of gold medals won}}{\text{Total number of medals won}}\\\Rightarrow \dfrac{11}{33}\\\Rightarrow \bold{\dfrac{1}{3}}

<em>Question 30:</em>

Number of girls = 20

Ratio of boys to Ratio of girls = 3 : 5

a. Total number of students in the class?

First of all, we need to find the number of boys in the class then we will add the value to the number of girls to get the answer.

Let the number of boys = x

As per the ratio, we can write:

\dfrac{3}{5 } = \dfrac{x}{20}\\\Rightarrow x = 12

Total number of students = 20 + 12 = <em>32</em>

b. Four number of boys and four girls are moved to other class.

Number of boys left = 12 - 4 = 8

Number of girls left = 20 - 4 = 16

New ratio = 8 : 16 = <em>1 : 2</em>

Therefore, the ratio got changed to <em>1 : 2</em>.

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Is triangle ABC similar to triangle DEF? why or why not.
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Answer:

D

Step-by-step explanation:

Two triangles are congruent if they have the same three sides in proportion and they have exactly the same angles.

If the angles are different, the triangles are not similar.

3 0
3 years ago
I need help with this!! What is the answer???!
Natalija [7]

Answer:

53

Step-by-step explanation:

Sum of interior angles of a pentagon = 540°

Therefore,

2x° +2x° + 3x° + 3x° + 10 = 540°

10x° + 10° = 540°

10x° = 540° - 10°

10x° = 530°

10x = 530

x = 530/10

x = 53

7 0
2 years ago
Which one should I choose
Nostrana [21]

Answer:

its the last one

Step-by-step explanation:

the sign flips when you divide by a negative

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Solve the equation using square roots.
Virty [35]

Answer: LAST OPTION.

Step-by-step explanation:

1. You have the following equation:

6x^{2}=54

2. Then you must solve for x, as following:

x^{2}=54/6\\x^{2}=9\\x=\sqrt{9}\\x=+/-3

Therefore, as you can see above, the answer for the exercise is the last option.

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Just Need A Few Questions Answered To Finish My Quiz, Any Help Would Be Much Appreciated.
kvv77 [185]

Given the triangle

PQR

with points

P(8,0)

Q(6,2)

R(-2,-4)

And the triangle

P'Q'R'

with points

P'(4,0)

Q'(3,1)

R'(-1,-2)

Part A. Scale factor

Using the vertex

P( 8, 0)

P'(4,0)

the dilatation factor is given by

\frac{4}{8}=\frac{1}{2}

The triangle has a dilatation factor of 1/2

Part B:

P''Q''R'' after using P'Q'R' reflected about the y axis

to make a reflection over the y axis

coordinates (x,y) turn into coordinates (-x,y)

as follows

P^{\prime}(4,0)\rightarrow P^{\prime\prime}(-4,0)Q^{\prime}(3,1)\rightarrow Q^{\prime\prime}(-3,1)R^{\prime}(-1,-2)\rightarrow R^{\prime\prime}(1,-2)

Then triangle P''Q''R'' has coordinates

P''(-4,0)

Q''(-3,1)

R''(1,-2)

Part C:

PQR is congruent to P''Q''R''?

Congruent triangles are triangles that have the same size and shape. This means that the corresponding sides are equal and the corresponding angles are equal.

Then the triangles are not congruent

8 0
8 months ago
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