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scoundrel [369]
3 years ago
15

10(y+2)-y=2(9y-8) i need to know how to solve it

Mathematics
1 answer:
vlabodo [156]3 years ago
6 0

10(y+2)-y=2(9y-8)

Mutiply the first bracket by 10

Mutiply the second bracket by 2

(10)(y)(10)(2)= 10y+20

(2)(9y)(2)(-8)= 18y-16

10y+20-y= 18y-16

10y-y+20= 18y-16

9y+20= 18y-16

move 18y to the other side

sign changes from +18y to -18y

9y-18y+20= 18y-18y-16

-9y+20= -16

move +20 to the other side

sign changes from +20 to -20

-9y+20-20=-16-20

-9y= -36

divide by -9

-9y/-9= -36/-9

y= 4

Answer: y= 4

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Help me plz, thanks.
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6 0
2 years ago
If 5% of my stock is $70,000 what would 100% be?
Nataly_w [17]

Answer:

never did this with big numbers but i will try lol! okay so  the word "is" means the number after that with be of the top. And the word "of" (and the nummber after that) will always be on the bottom. so remember is/of

Step-by-step explanation:

5% so you will have 5/100

IS $70,000 (70,000 will be on the top of your fraction)

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7 0
2 years ago
Justin has $7.50 more than Eva, and Emma has $12 less than Justin. Together , they have a total of 63.00. How much money does ea
Setler [38]
Since no value is given to Eva, we'll call her x. Justin, then, is 7.50+x. That leaves Emma, who would be Justin (7.50+x) -12. If we add them all together we get 63. So our equation is

x + (7.50+x) + (7.50+x)-12 = 63

Combine like terms

x+x+x + 7.50+7.50-12 = 63
3x + 3 = 63
3x = 60
x = 20

Since we said Eva is x then Eva has 20 dollars.

Justin is 7.50 + x so 7.50+20=
$27.50

Emma is Justin - 12 so 27.50-12= $15.50

Let's check our answer...

15.50+27.50+20 = 63
63=63

It checks!
4 0
3 years ago
There are 28 student desks in a class. Each desk measures 26.17 inches. If you were to line up all the desks end to end how long
nekit [7.7K]

732. 76 inches which would equal 61.06 feet

6 0
2 years ago
Michael is packing books into boxes. Each box can hold either 15 small books or
zavuch27 [327]

Let x equal the number of tiny book boxes and y equal the number of large book boxes.

Because John must pack at least 35 boxes:

(number of tiny book boxes) + (number of large book boxes) = (at least) 35

x + y ≥ 35

 

Since John needs to pack at least 350 books:

 

(number of small books packed) + (number of large books packed) (is at least) 350

(number of small books per box)(number of boxes of small books) + (number of large books per box)(number of boxes of small books) ≥ 350

15x + 8y ≥ 350

 

Your system of inequalities is:

 

x + y ≥ 35

15x + 8y ≥ 350

<h2>GO INTO DESMOS TO GRAPH</h2>
7 0
2 years ago
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