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USPshnik [31]
3 years ago
10

Sarah is twice as old as her youngest brother. If the difference Between their ages is 15 years. How old is the youngest brother

Mathematics
1 answer:
Leto [7]3 years ago
6 0
I'm not to sure but i think it's 15. this question is worded weirdly
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oscar bought some markers notebooks and packs of sticky notes for his office he bought the same number of markers as notebooks h
s2008m [1.1K]

The number of each kind of office supply oscar bought is = markers= (43.2 - 4.2y)/3 notebooks = (43.2-3x)/4.2, sticky notes = [43.2 - 4.2y)/3 + (43.2-3x)/4.2] + 3.

<h3>Calculation of total office supply</h3>

The number of markers he bought = X

The number of notebooks he bought= y

The number of sticky notes he bought= z= 3 + X+y

The amount he paid for markers = $1.05*X

The amount he paid for notebooks = $2.25*y

The amount he paid for sticky notes= $1.95 (3 + X+y)

The total amount he paid is = $49.05

That is;

$49.05 = $1.05x + $2.25y + $1.95 (3 + X+y)

$49.05 = $1.05x + $2.25y + $5.85 + $1.95x + $1.95y

$49.05 - $5.85 = 3x + 4.2y

$43.2 = 3x + 4.2y

Make X the subject of formula,

3x = 43.2 - 4.2y

X = (43.2 - 4.2y)/3

y= (43.2-3x)/4.2

z = [43.2 - 4.2y)/3 + (43.2-3x)/4.2] + 3

Learn more about addition here:

brainly.com/question/4721701

#SPJ1

4 0
1 year ago
Simplify the radical expression by rationalizing the denominat o 3/11
8090 [49]
Do you mean 3/√11 ? In this case, you'll have to multiply both, numerator and denominator by the denominator ... 
5 0
3 years ago
Read 2 more answers
I need to know how to write a equation number sentence for my time traveled from 2020 to 2000
vesna_86 [32]

Answer:

explain further or send a picture of what you mean and then I can help you

5 0
3 years ago
Find the common ratio of the following geometric sequence 5/12, 1/4 , 3/20,9/100,27/500
mixas84 [53]
All you have to is divide two consecutive terms to calculate the common ratio

1/4 divided by 5/12 = 1/4 * 12/5 = 12/20 = 3/5
7 0
3 years ago
Help I need this quick
luda_lava [24]
Area of the 2 end triangles plus area of the 2 rectangular sides plus the area of the bottom rectangle

2 end Triangles
=2x(1/2bh)
=2x1/2x4x6
=24

2 side rectangles
=2(lw)
=2x5x13
=130

Bottom rectangle
=6x13
=78

Total = 24 + 130 + 78 =232

6 0
2 years ago
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