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frosja888 [35]
3 years ago
15

There are 4 triangles and 2 circles. What is the simplest ratio of circles to triangles?

Mathematics
2 answers:
Zinaida [17]3 years ago
8 0

Answer:

1:2

Step-by-step explanation:

it would originally be 2:4 But both are divisible by 2 so they simplify down to 1:2........2÷2=1 and 4÷2=2 since the ratio has to be circles to triangle the 1 goes first then the 2

Nat2105 [25]3 years ago
3 0

Answer:1:2

Step-by-step explanation:

it is this answer because you have 2 circles for 4 triangles, you can simplify that by dividing each number by 2 and you get 1 and 2

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Nathan spins 2 different spinners at the same time.There are a total of 10 possible outcomes.which pair of spinners did Nathan s
Dahasolnce [82]

Answer: 20 percent .............

4 0
3 years ago
Scores on a final exam taken by 1200 students have a bell shaped distribution with mean=72 and standard deviation=9
SVETLANKA909090 [29]

Answer:

a. 72

b. 816

c. 570

d. 30

Step-by-step explanation:

Given the graph is a bell - shaped curve. So, we understand that this is a normal distribution and that the bell - shaped curve is a symmetric curve.

Please refer the figure for a better understanding.

a. In a normal distribution, Mean = Median = Mode

Therefore, Median = Mean = 72

b. We have to know that 68% of the values are within the first standard deviation of the mean.

i.e., 68% values are between Mean $ \pm $ Standard Deviation (SD).

Scores between 63 and 81 :

Note that 72 - 9 = 63 and

72 + 9 = 81

This implies scores between 63 and 81 constitute 68% of the values, 34% each, since the curve is symmetric.

Now, Scores between 63 and 81 = $ \frac{68}{100} \times 1200 $

= 68 X 12 = 816.

That means 816 students have scored between 63 and 81.

c. We have to know that 95% of the values lie between second Standard Deviation of the mean.

i.e., 95% values are between Mean $ \pm $ 2(SD).

Note that 90 = 72 + 2(9) = 72 + 18

Also, 54 = 63 - 18.

Scores between 54 and 90 totally constitute 95% of the values. So, Scores between 72 and 90 should amount to $ \frac{95}{2} \% $ of the values.

Therefore, Scores between 72 and 90 = $ \frac{95}{2(100)} \times 1200 = \frac{95}{200} \times 1200  $

$ \implies 95 \times 12 $ = 570.

That is a total of 570 students scored between 72 and 90.

d. We have to know that 5 % of the values lie on the thirst standard Deviation of the mean.

In this case, 5 % of the values lie between below 54 and above 90.

Since, we are asked to find scores below 54. It should be 2.5% of the values.

So, Scores below 54 = $ \frac{2.5}{100} \times 1200 $

= 2.5 X 12 = 30.

That is, 30 students have scored below 54.

8 0
3 years ago
Select all the pairs that represent consecutive interior (or same-side interior) angles.
DedPeter [7]

Answer:

angle 4 and angle 8

angle 3 and angle 5

Step-by-step explanation: the pair of angles on one side of the transversal and inside the two lines are called the consecutive interior angles  

so, angle 4 and angle 8

and angle 3 and angle 5

are consecutive interior angles.

3 0
2 years ago
Find the value<br>x- 1/x​
Artyom0805 [142]

Answer:

the value of x-1/x is given down

Step-by-step explanation:

=(x+1/x)²=x²+1/x²+2

=(5)²=x²+1/x²+2

=x²+1/x²=25-2

=x²+1/x²=23 this is the answer

if u ask there how 25 came means there (5)² is that u should multiply 5×5 and u will get 25bas the answer

3 0
3 years ago
HELP MEEEE!<br> 7th gradeeee
Brilliant_brown [7]

Answer:

0=0

Step-by-step explanation:

Add zero

0+2=2

2=2

Subtract 2 from both sides of the equation

2=2

2−2=2−2

Simplify

Combine like terms

2−2=2−2

0=2-2s

or

0=2s-2

0=0

Answer 0=0

8 0
3 years ago
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