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anzhelika [568]
2 years ago
8

a boy is older than his sister by 3 years five years ago, the ratio of their ages was 4 : 3 find his present.​

Mathematics
2 answers:
pashok25 [27]2 years ago
8 0
B:S = 4x:3x
4x - 3x = 3
x = 3
They were 12 & 9.
Add 5 to that.
So he’s now 17 and she’s 14
AnnZ [28]2 years ago
8 0

Answer:

five years ago -- boy-   x+3 years

                           sister ---  x

ratio-- 4:3  so difference is 3 years

4-3-- 1   1--3

five years ago ---  sister  :3*3--9   brother : 4*3--12

present : sister 14 years and brother 17 years old

 

Step-by-step explanation:

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Vika [28.1K]

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We have been given that a website-hosting service charges businesses a onetime setup fee of $350 plus d dollars for each month. A business owner paid $1,010 for the first 12 months, including the setup fee.  

Here we can use the linear equation.

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7 0
1 year ago
If the line passing through the points (a, 1) and (−2, 6) is parallel to the line passing through the points (−12, 9) and (a + 2
iren2701 [21]

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8 0
3 years ago
URGENT: PLEASE HELP!
vazorg [7]

To solve this problem, we are going to set up an equation. However, first we need to convert the percentages to decimals by dividing by 100.

15% = 0.15 , 7.5% = 0.075

Now, we should substitute in our given information into our equation and let our unknown value be equal to the variable x.

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Then, we should simplify our equation by multiplying together the two factors on the left side of the equation.

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Finally, we should divide both sides of the equation by 0.075 to get the variable x alone.

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4 0
3 years ago
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dybincka [34]

Step-by-step explanation:

3x^2-2x+1

3(2)^2-2(2)+1

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4 0
2 years ago
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Plot two points that are 777 units from Point \blueD{D}Dstart color #11accd, D, end color #11accd and also share the same xxx-co
Karolina [17]

Right format of question:

Plot two points that are 7 units from Point D and also share the same x-coordinate as Point D.

Answer:

D' = (-4,-6) and D' = (-4,8)

Step-by-step explanation:

Given

D(x,y) = (-4,1)

Required

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D' = D(x,y+7)

D' = (-4,1+7)

D' = (-4,8)

3 0
3 years ago
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