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vlabodo [156]
4 years ago
13

Please help me solve this, I can't get a right answer even though it is easy: | 2x + 4 | = 12

Mathematics
1 answer:
Ket [755]4 years ago
5 0
Because the left side is eclipsed in an absolute value, we have two possible values of x, denoted by:
2x+4 = 12 and -(2x+4) = 12

Solving for both of these, we are presented with the two values of x:
x = 4 and x = -8
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Answer:

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Step-by-step explanation:

Let t hours be the time it takes Roger to puddle out on a lake. Then \left(1\dfrac{1}{2}-t\right) hours is the time it takes him to return (note that 1 hour and 30 minutes is exactly 1\dfrac{1}{2} hours).

1. If he paddles out on a lake at 4 kph for t minutes, then the distance is

4\cdot t=4t\ km.

2. If he  returns at 2 kph, then the distance is

2\cdot \left(1\dfrac{1}{2}-t\right)=3-2t\ km.

3. These distances are the same, thus

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3 years ago
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Answer:

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Step-by-step explanation:

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4 years ago
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