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sasho [114]
3 years ago
7

Help with Roatations.

Mathematics
1 answer:
Fiesta28 [93]3 years ago
5 0

A 180 degree rotation will map the figure onto itself.

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The two triangles are similar below. Find the value of x in the following: (NOT DRAWN TO SCALE)​
Y_Kistochka [10]

Answer:

  x = 2.4

Step-by-step explanation:

Corresponding sides of the similar triangles are proportional:

  x/(x+3) = 8/18

  18x = 8(x +3) . . . . . multiply by 18(x+3)

  10x = 24 . . . . . . . . subtract 8x

  x = 2.4 . . . . . . . . . . divide by 10

7 0
3 years ago
WILL GIVE 20 POINTS TO THE BRAINLIEST ANSWER
Shalnov [3]

Answer:

1. 16x-188

2. 5x-90

Step-by-step explanation:

1.

9x-8+7x-y=180

y=9x-8+7x-180=16x-188

2.

2x-y+3x=90

y=5x-90

4 0
3 years ago
Using your own words, explain direct and inverse proportionality. (Be sure to use complete sentences.)
JulijaS [17]
In an inverse proportion two veriables are inversely proportional to each other.You can write the equation as P=n/x, and N is the constant of proportionality.In the equation the X increases and the P decreases.

8 0
3 years ago
Read 2 more answers
Five numbers has a mean of 12. When one (1) number is removed the mean is 11. What is the value of the number removed?
bonufazy [111]

Answer:

16

Step-by-step explanation:

The mean of a group of values is calculated as

mean = \frac{sum}{count}

Given 5 numbers with a mean of 12, then

\frac{sum}{5} = 12 ( multiply both sides by 5 )

sum = 60

let the number removed be x , then

\frac{60-x}{4} = 11 ( multiply both sides by 4 )

60 - x = 44 ( subtract 60 from both sides )

- x = - 16 ( multiply both sides by - 1 )

x = 16

The number removed was 16

6 0
3 years ago
A university has 29,970 students. In a random sample of 285 students, 19 speak three or more languages. Predict the number of st
hodyreva [135]
Set up a proportion.
Let x = the number of students in 29970 who speak 3 or more languages.

285/19 = 29970/x Cross multiply
285 x = 19 * 29970
285x = 569430
x = 569430/285
x = 5415 students speak 3 languages.
4 0
3 years ago
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