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Anettt [7]
3 years ago
13

Mavis is 5 years older than her brother. Five years ago she was 2 times older than her brother. How old is each now?

Mathematics
2 answers:
Ber [7]3 years ago
5 0
15 and 10 because

five years ago he would be 10 and the brother would be 5 and 10 is double 5

Andrei [34K]3 years ago
5 0
M=Mavis
B=Brother Age
M=B+5

Five years ago...
M-5
B-5
Since Mavis is twice her brother age you have to multiple by 2
(M-5) = 2(B-5)

Substitute M=B+5
(B+5-5) =2B-10

B=2B-10

-B=10
10+5=15

Mavis is 15
Brother is 10
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2 years ago
A girl scout troop sold cookies. If the girls sold 5 more boxes the second week than they did the first, and if they double the
valina [46]

Answer:

Boxes sold first week = 104

Boxes sold second week =x+5= 104+5=109

Boxes sold third  week = 109 times 2= 218

Step-by-step explanation:

Let x be the number of boxes sold in first week

the girls sold 5 more boxes the second week

So number of boxes sold in second week is x+5

they double the sales of the second week for the third week

So number of boxes sold in third week is 2 (x+5)

Total boxes sold is 431

x+x+5+2(x+5)=431

x+x+5+2x+10=431

4x+15=431

subtract 15 from both sides

4x=416

divide by 4 on both sides

x=104

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Boxes sold third  week = 104 times 2= 218

4 0
3 years ago
Okay i need some help fast
Troyanec [42]

Answer:

<em>Dimensions : 1 by 1 by 2 feet,</em>

<em>Volume ⇒ 2 ft^3</em>

Step-by-step explanation:

Here, I can only assume that this rectangular prism is assigned to have dimensions 1 foot by 1 foot by 2 feet;

I can tell that these types of boxes have height and width as the same lengths, so given that;

<em>Dimensions : 1 by 1 by 2 feet,</em>

Volume ⇒ 1 * 1 * 2 ( by definition ) ⇒ 2 ft^3

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