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jasenka [17]
2 years ago
13

Jean estimates that her friend completes a new level of a video game on the first try 20% of the time. She conducts a simulation

to predict how many times out of 80 her friend would complete a new level on the first try. Jean uses a random number generator. Every digit that is 8 or 9 represents completing the level. Examine the table. ​
Mathematics
1 answer:
Rainbow [258]2 years ago
8 0

The probability of the friend completing the new level in her first try is 22.5%

<h3>What is probability?</h3>

This is a concept that is used to talk about the likelihood or the chances of an event occuring.

For the digit 8, the frequency is 7

For the digit 9, the frequency is 11

The total number of frequencies is given as

10 + 9 + 6+ 7 + 8 + 12 + 4 + 6 + 7 + 11 = 80

7 + 11 = 18

Probability = 18/80

= 0.225 x 100

= 22.5%

Read more on probability here: brainly.com/question/251701

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8x + 6 + 2x = 12 + 4x​
weeeeeb [17]

Answer:

x=1

Step-by-step explanation:

8x+6+2x=12+4x

10x+6=12+4x

     -6   -6

10x=6+4x

-4x      -4x

6x=6

x=1

4 0
3 years ago
What the surface area of the regular square pyramid?is (Figure is not drawn to scale.)7 cm9 cm A) 120.5 cmo B) 144 cm C) 207 cm
Sindrei [870]
The answer is C. 207 cm. The formula to find the area of a triangle is 1/2 base times height. So the base is 9cm and the height is 7cm. Multiply them and you get 63, but you have to divide by 2 because the formula so you get 31.5 cm. Multiply that by 4 because there are four triangles. So you get 126 cm. Then to find the area of the square, you do s times s. Side times side so 9 times 9 is 81. Add the 81 and 126 together and your answer is 207. hope i helped ya!!
6 0
3 years ago
FIRST ANSWER WILL RECEIVE BRAILIEST!!
Artist 52 [7]

Answer:

the truck will over load with 13 refrigerators and 8 pianos

Step-by-step explanation:

13 refrigerators is 2600 lbs

8 pianos is 4200 lbs

both added together is 6800 lbs

the truck can only hold 5900 so 13 refrigerators and 8 pianos is too heavy

7 0
3 years ago
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Mason asks his friends at school to do his questionnaire. This may not be a good sample to use
Vinvika [58]
Because his friends are not representative. If he would want to receive information about his friends, then this would be a good sample, however, considering that Mason probably wants data that are more representative, it would be better for him to gather info from his school or even wider. This would help him get better data for what he wanted to find information about :)
4 0
3 years ago
Vincent wrote an example of a proportion on the board.
bekas [8.4K]
This proportion is not correct because the two parts in the top (numerator)need to either both say base, or both say height.

If both tops said base, then both originals would be on the left, and both reductions would be on the right.

The way to look at this would be to make sure both units on the top, on the left, AND on the right had a similarity.

EXAMPLE:

Base original/base reduction and height original/height reduction

Or

Base original/height original and base reduction/height reduction

3 0
3 years ago
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