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klasskru [66]
3 years ago
15

i thought of a number. if i subtract 6 from it and multiply the difference by 4 the result is 36. find the number that i thought

of
Mathematics
1 answer:
SVEN [57.7K]3 years ago
3 0
Since the difference*4=36, the difference = 9
since the number-6= the difference, the number-6=9
Thus the number is 15
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Please help me I don’t know how to solve it and will mark brainiliest
Sindrei [870]

Answer: One plain roll is 4 dollars and one shiny roll is 6 dollars.

Step-by-step explanation:

lets start by saying

rolls of plain wrapping paper = x

rolls of shiny wrapping paper = y

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Eugene sold 4 plain rolls and 2 shiny rolls for 28 dollars

4x+2y=28

Both equations will look like this.

4x+3y=34

-1(4x+2y)=(28)-1

we can multiply the second equation by -1 to get y alone. (doesn't matter which equation). Once you do that, the positive 4x and the negative 4x cancel out, 3y-2y=1y and 34-28=6. you are left with

1y=6 so one shiny roll is 6 dollars.

now use that price to find the cost of the plain roll.

lets use Kathryn's equation

4x + 3(6)=34

4x + 18= 34

      -18  -18

4x=16. Divide by 4 to find cost of one plain roll.

16÷4=4. One plain roll costs 4 dollars.

Lets check. Using Kathryn's equation,

4(4) + 3(6)=34

16+18=34

34=34. We are right.

3 0
3 years ago
80 items were sold, bringing in $6,900 in receipts. Some items were sold at a discount for $75 each and some others were sold at
Leni [432]

Answer:

50 items were sold for $75

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Step-by-step explanation:

75 x 50 = 3750

90 x 35 = 3150

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4 0
2 years ago
Rewrite as difference of squares (2x+5)(2x-5)
andre [41]
4x^2-25

I got u homie wherever in the world u r
4 0
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From scatter plot, it was discovered that there is a linear relationship between the two variables and both variables are quantitative.

Therefore, it appropriate to use the correlation coefficient to describe the strength of the relationship between​ "Time" and​ "Fish Quality"?

4 0
3 years ago
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Vaselesa [24]

Answer:

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Step-by-step explanation:

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Therefore, x = 1/2 and 3/2 are the answers.

3 0
3 years ago
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