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MrRissso [65]
3 years ago
9

Four times a number is 4 more than two times the number. What is the number? show all work

Mathematics
2 answers:
wariber [46]3 years ago
7 0
4n = 2n + 4

Solve for n.

Subtract 2n from both sides.

2n = 4

Divide 2 on both sides.

n = 2

Hope this helps!
MrRa [10]3 years ago
5 0
4x = 2x + 4 <== ur equation
4x - 2x = 4
2x = 4
x = 4/2
x = 2 <== ur number
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Please answer this correctly
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Answer:

Mode

Step-by-step explanation:

Mean:

Before replacing = 464/8 = 58

After replacing 42 with 98 = 520/8 = 65

Mode:

Before replacing = 42

After replacing 42 with 98 = 98

Median:

25, 42 , 42 , 47, 55 , 59, 96,98

Before replacing =  47+55/2 = 51

25, 42 ,  47, 55 , 59, 96,98 , 98

After replacing 42 with 98 =  55+59/2 = 114/2 = 57

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Noah gathered data at his school among 7th and 8th graders to see if there was an association between grade level and handedness
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Answer: 4) 157

Step-by-step explanation:

We know that there is no association between the grade level and the andedness, then we should find that the ratio between left handeds and right handed is the same for both grades.

In 7-th grade we have:

Left handed : 11

Right handed: 72

The ratio is 11/72 = 0.14

Then, the ratio for the 8-th graders must be about the same:

Left handed: 24

Right handed: X

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Let's start with the bigger option, X = 157.

24/157 = 0.15

Ok, we now see that with the bigger option we obtained almost the same ratio (if we use the smaller values for X, we will get a ratio bigger than 0.15, so 0.15 is the better aproximation that we can find to the 0.14 of the 7-th graders)

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<u>SOLUTION:</u>

Given that, there are 4 different math courses, 5 different science courses, and 2 different history courses.

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So, now, total possible ways = product of possible ways for each course = 4 x 5 x 2 = 40 ways.

Hence, a student can take three subjects in 40 ways.

6 0
3 years ago
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