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Sonja [21]
3 years ago
9

What is the equation -7+82

Mathematics
2 answers:
Irina-Kira [14]3 years ago
7 0

Answer:

75

Step-by-step explanation:

A better way to look at it is to use the communitive property of addition to swap the sides of the numbers. Now we have positive eighty-two (+82) and negative seven (-7).

+82 - 7 looks a lot easier even though it is the same problem.

scoundrel [369]3 years ago
5 0

Answer:

75

Step-by-step explanation:

If you flip the numbers around then all you have to do is 82-7 and when you do this then you get 75 which is the answer

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What is the exponential function that best models the number of gnats the scientists have gathered after the number of hours lis
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Answer:

Option A

f(x) = 12.5(1.6)^x

Step-by-step explanation:

The number of gnats the scientists have gathered

At 0 hours, they gathered 12 gnats.

Checking all the options, applying x = 0 makes the index part become 1 (Anything raised to the power zero is 1).

So, we have the following functions

f(x) = 12.5

f(x) = 12.6

f(x) = 6.2

f(x) = 1.6

This has reduced our work, as we can screen out options C and D, they are too far from 12. This leaves us with option A and B.

At 1 hour, they gathered 20 gnats.

Checking options A and B

A. f(x) = 12.5(1.6)

= 20

B. f(x) = 12.6(6.2)

By inspection, 12 × 6 is already 72,

12.6 × 6.2 will be more.

By these, we can conclude that f(x) = 12.5(1.6)^x has the best models the number of gnats the scientists have gathered after the number of hours listed in the given table.

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