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2 years ago

A+3b = 7, c= 3 , then the value of a+3 (b+c ) =............

Mathematics

2 answers:

vaieri [72.5K]2 years ago

7 0

Answer:

Step-by-step explanation:

a+ 3(b + c)

a + 3b + 3c

but a + 3b = 7 and c = 3

7+3(3)

7 + 9

=16

fenix001 [56]2 years ago

3 0

See attachment for math work.

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Answer:

Part 1) see the explanation

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Step-by-step explanation:

The question in English is

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Part 1) we have

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Let

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y ---> the number of pages that the machine print (represent the dependent variable or output value)

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A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In this problem

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Part 2) we have

An elevator takes 6 seconds to go up two floors.

Let

x ----> the time in seconds (represent the variable independent or input value)

y ---> the number of floors (represent the dependent variable or output value)

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A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

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Part 3) we have

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Let

x ----> the number of days (represent the variable independent or input value)

y ---> the cost of rent a car (represent the dependent variable or output value)

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A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In this problem

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$k=\frac{y}{x}$

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Part 4) we have

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x ----> the kilograms of papaya (represent the variable independent or input value)

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$k=\frac{35}{10}=\$3.5\ per\ kg$

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$y=3.5x$

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