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DaniilM [7]
3 years ago
10

If 5.7×10^k= 570,000, what is the value of k?

Mathematics
1 answer:
antiseptic1488 [7]3 years ago
6 0

Answer:

5

Step-by-step explanation:

570000/5.7 is 100000

100000 is 10^5

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A line passes through the point (-2,7) and had a slope of -5
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Answer:

a = -1

Step-by-step explanation:

The general equation for a straight line is y = mx+c, where m is the gradient/ slope, so m = -5. The first thing we need to do is find c, which we do by plugging in the x and y values that we already know: y = 7 and x = -2

7 = -5*(-2) + c

7 = 10 + c

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Now, we have the general equation of y = -5x -3 and we can use this to find a.

We'll treat a as x and y will be equal to 2:

2 = -5a -3

5 = -5a (Divide both sides by 5)

-a = 1 (now by -1)

a = -1

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3 years ago
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Step-by-step explanation:

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