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rodikova [14]
3 years ago
10

A driver who drives at a speed of r mph for t hr will travel a distance d mi given by dequalsrt mi. How far will a driver travel

at a speed of 57 mph for 8 ​hr?
Mathematics
1 answer:
liubo4ka [24]3 years ago
5 0

Answer:

At a speed of 57 mph for 8 hr a driver will travel 456 mi

Step-by-step explanation:

Here we have a summary of the letters for each variable:

Speed ---> r          (in units of mph)

Time ---> t            (in units of hr)

Distance ---> d     (in units of mi)

These three variables are related by the next formula:

d = rt

In the data they give to you: 57 mph and 8 hr, they are telling you the r and the t, respectively:

r = 57 mph

t = 8 hr

The only thing you have to do is replace the values:

d = rt    ---->     d = 57 mph x 8 hr

                        d = 456 mi

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Answer:

f(x) = 0.2x

Step-by-step explanation:

hello :

let : f(x) = ax+b    calculate a  and b

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given    :  f(x-3) = 0.2x-0.6...(**)

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3 years ago
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Answer:

t = -5

Step-by-step explanation:

Solve for t:

5 (t - 3) - 2 t = -30

Hint: | Distribute 5 over t - 3.

5 (t - 3) = 5 t - 15:

5 t - 15 - 2 t = -30

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Grouping like terms, 5 t - 2 t - 15 = (5 t - 2 t) - 15:

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Hint: | Combine like terms in 5 t - 2 t.

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Hint: | Look for the difference of two identical terms.

15 - 15 = 0:

3 t = 15 - 30

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Hint: | Divide both sides by a constant to simplify the equation.

Divide both sides of 3 t = -15 by 3:

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Hint: | Any nonzero number divided by itself is one.

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Hint: | Reduce (-15)/3 to lowest terms. Start by finding the GCD of -15 and 3.

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