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jarptica [38.1K]
3 years ago
6

Pieter wrote and solved an equation that models the number of hours it takes to dig a well to a level of 72 feet below sea level

.
7h – 5(3h – 8) = –72
Which statement is true about Pieter’s solution?

It cannot be a fraction or decimal because the depth of the well is a whole number.
It must be a positive number since it represents a number of hours.
It must be a negative number because the depth is below sea level.
It cannot be greater than –72 because that is the depth of the well.
Mathematics
1 answer:
il63 [147K]3 years ago
7 0

Answer:

The answer is B or It must be a positive number since it represents a number of hours.

Step-by-step explanation:

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Find f(g(3)) given:<br> *<br> f (x) = 2x2 – 1<br> g(x) = 3x<br> h(x) =<br> j(x) = x - 5
bezimeni [28]

Answer:

161

Step-by-step explanation:

Given the functions

f (x) = 2x^2 – 1

g(x) = 3x

we are to find f(g(3))

First look for the composite function f(g(x))

f(g(x)) = f(3x)

f(3x)  = 2(3x)² - 1

f(3x)  = 2*9x² - 1

f(3x)  = 18x² - 1

f(g(x)) =  18x² - 1

Substitute x  = 3 into the result

f(g(3)) = 18(3)² - 1

f(g(3)) = 18*9- 1

f(g(3)) = 162-1

f(g(3)) = 161

Hence f(g(3)) is 161

5 0
3 years ago
100 POINTS
Kisachek [45]

Answer:

Part A) m=3

Part B) m=1

Step-by-step explanation:

we know that

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

Part A) Determine the slope for the line that passes through the points (3,5) and (−1,−7)

substitute the values in the formula

m=\frac{-7-5}{-1-3}

m=\frac{-12}{-4}

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Part B) Determine the slope for the line that passes through the points given by the table of values

Looking at the given table, take two points

(0,-5) and (2,-3)

substitute the values in the formula

m=\frac{-3+5}{2-0}

m=\frac{2}{2}

m=1

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4 years ago
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Answer:

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Step-by-step explanation:

No bc it all adds up to $143.87 so she would need $23.87 more to be able to pay.

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3 years ago
Only serious answers please
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Hello!

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S T O R E A:

56 ÷ 15 = 3.73 (Repeating decimal)


S T O R E B:

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