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kondaur [170]
3 years ago
13

HELP ME PLEASE with this math question

Mathematics
1 answer:
icang [17]3 years ago
6 0

Answer:

18.9c - 11.2d + 9.3f

Step-by-step explanation:

<u>First, write the equation as adding all the parentheses together like so:</u>

(9.7c - 1.9d) + (9.2c + 1.1f) + (8.2f - 9.3d)

<u>Remove the parentheses:</u>

9.7c - 1.9d + 9.2c + 1.1f + 8.2f - 9.3d

<u>Collect like terms (9.7c and + 9.2c):</u>

18.9c - 1.9d + 1.1f + 8.2f - 9.3d

<u>Collect like terms again (1.9d and - 9.3d):</u>

18.9c - 11.2d + 1.1f + 8.2f

<u>Collect like terms again (1.1f + 8.2f)</u>

18.9c - 11.2d + 9.3f

Hope this helped!

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56 people drink 3 cups daily

Step-by-step explanation:

What's the total number of people that drink 3 cups?

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Step-by-step explanation:

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The value of a certain car decreases by 16% each year. What is the 1⁄2-life of the car?
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Answer:

The half life of the car is 3.98 years.

Step-by-step explanation:

The value of the car after t years is given by the following equation:

V(t) = V(0)(1-r)^{t}

In which V(0) is the initial value and r is the constant decay rate, as a decimal.

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This means that r = 0.16

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V(t) = V(0)(1-r)^{t}

V(t) = V(0)(1-0.16)^{t}

V(t) = V(0)(0.84)^{t}

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This is t for which V(t) = 0.5V(0). So

V(t) = V(0)(0.84)^{t}

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(0.84)^{t} = 0.5

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t\log{0.84} = \log{0.5}

t = \frac{\log{0.5}}{\log{0.84}}

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The half life of the car is 3.98 years.

7 0
3 years ago
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