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ahrayia [7]
3 years ago
13

My brother is 4 years younger than my sister and 5 years older than me in 2 years. If I am 15 now how old will my sister be when

she is twice my brother's age.
Mathematics
1 answer:
Virty [35]3 years ago
6 0
Your sister is 24. Your brother is 20. You are 15. Therefore, your sister will be 48 years old. I’m 87% sure I did this right. Lol, good luck.
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andrezito [222]

Answer:

y=0.2x+284

Step-by-step explanation:

Let  x be the distance driven, d-distance and C our constant.

Our information can be presented as:

y=mx+c\\\\450=830x+C\ \ \ \ \ \ \ \ \ eqtn 1\\\\380=480x+C\ \ \ \ \ \ \ \ \ eqtn 2

#Subtracting equation 2 from 1:

70=350x\\x=0.2

Hence the fixed cost per mile driven,x is $0.20

To find the constant,C we substitute x in any of the equations:

450=830x+C\ \ \ \ \ \ \ X=0.2\\\therefore C=450-830\times0.2\\=284

Now, substituting our values in the linear equation:

y=0.2x+284       #y=cost of driving, x=distance driven

Hence the linear equation for the cost of driving is y+0.2x+284

7 0
3 years ago
Volume 918 yd. what is volume in ft
vitfil [10]
<span>918yd³= 24786.00ft³

i believe that's what you were looking for?</span>
8 0
3 years ago
!!20 POINTS!!
Sidana [21]

Answer:33.415 through 33.585 Or A

Step-by-step explanation:

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6 0
3 years ago
what is the volume of a right cylinder which has a base radius of 14 inches and a height of 2 inches?
azamat
The answer is 28 for the volume
7 0
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Translate the sentence into an inequality. Eight times the sum of a number and 20 is greater than or equal to 25. Use the variab
PtichkaEL [24]

Answer:

8x + 20 ≥ 25

Step-by-step explanation:

Well 8 times the sum of a number "x" plus 20,

So we can write the following,

8x + 20

and that should be greater than or equal to 25

8x + 20 ≥ 25

<em>Thus,</em>

<em>as an inequality it is 8x + 20 ≥ 25.</em>

<em />

<em>Hope this helps :)</em>

3 0
3 years ago
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