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Zina [86]
2 years ago
7

The speed of the current in a certain stream is 6 mph. If a boat travels 94 miles

Mathematics
1 answer:
Katyanochek1 [597]2 years ago
5 0

Answer: The trick to this question is twofold:

Spot that 94 is double 47. Therefore when going downstream, the speed of the boat relative to the earth is double it's speed going upstream as it covers double the distance in the same time.

Understand that whatever the speed of the boat is, when going downstream it's speed relative to the earth is 6mph greater than speed relative to the water, and conversely when going upstream, earth speed is 6mph less than water speed.

So, if the speed through the water is X, upstream speed is (X-6) and downstream speed is (X+6).

Now, we know that upstream speed is double downstream speed, so:

Double (x-6) is equal to (X+6)

Or:

2(x-6)=(X+6)

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Answer: she must complete 4 levels to have a point fewer than 20

Step-by-step explanation:

Given the following :

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Number of levels she must complete to have fewer Than 20 points

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Let number of levels = y

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What is 35/5 as a decimal
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Check out the graph below. We see that (3,0) is a root or x intercept. More specifically, the graph only touches the x axis at this point, rather than cross over (in contrast to a root like (-2,0) ). We say that the root here is of multiplicity 2. The multiplicity is due to the exponent of 2 over the (x-3) factor.

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