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3 years ago

50 points Hannah is 2 times her sister’s age. The sum of their ages is no more than 18 years.

Mathematics

2 answers:

RideAnS [48]3 years ago

7 0

Answer:

12 years old

Step-by-step explanation:

1) 2x+x=18

2) Now solve 2x+x=18

Add alike terms

3x=18

Now divide both sides by 3 (3x/3 and 18/3)

x=6

So Hannah is 6 years old. Her sister must be 12.

denis-greek [22]3 years ago

5 0

Answer:

Step-by-step explanation:

Let "Hannah" = h, and her sister = s

h = 2s

h + s ≤ 18

Plug in 2s for h in the second equation.

(2s) + s ≤ 18

Simplify

2s + s ≤ 18

3s ≤ 18

Isolate the variable (s). Divide 3 from both sides

(3s)/3 ≤ (18)/3

s ≤ 18/3

s ≤ 6

2) The oldest Hannah's sister can be is <em>6 years</em>

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