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Ber [7]
3 years ago
15

Vinnie drives his car 210 miles and has an average of a certain speed. If the average speed had been 3mph more, he could have tr

aveled 228 miles in the same length of time. What was his average speed?
Mathematics
2 answers:
monitta3 years ago
6 0

Sorry this took so long.....

Had to get some help from the internet

Have a great day!!!!!

Pachacha [2.7K]3 years ago
5 0

Answer:

35 mph

Step-by-step explanation:

time = distance / speed

210 miles and has an average of a certain speed

t = 210 / s

If the average speed had been 3mph more, he could have traveled 228 miles in the same length of time

t = 228 / (s + 3)

Set equal

210 / s = 228 / (s + 3)

Cross multiply

210s + 630 = 228s

Subtract 210s from both sides

630 = 18s

Divie both sides by 18

35 = s

35 mph

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3 years ago
Why would a box and whisker plot be unequal?
bearhunter [10]
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3 years ago
What is 8 3/5 + 4 4/5?
dangina [55]

Answer:

67/5 = 13 2/5

Step-by-step explanation:

Step 1: <u>Define/explain.</u>

An easier way to solve this is by changing the mixed fractions to improper fractions.

To do this, multiply the whole number by the denominator, then add the product to the numerator; the denominator remains the same.

Mixed fraction - a fraction with a whole number.

Improper fraction - a fraction with a numerator larger than the denominator.

Step 2: <u>Solve.</u>

8\frac{3}{5} =\frac{43}{5}

4\frac{4}{5} =\frac{24}{5}

From here, add as usual.

\frac{43}{5} +\frac{24}{5} =\frac{67}{5}

Step 3: <u>Conclude.</u>

You can change the improper fraction to a mixed fraction if you'd like.

To do this, divide the numerator by the denominator.

The amount of times the numerator evenly goes into the denominator is the whole number.

The amount of remaining numbers in the denominator.

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5 0
2 years ago
The dashed triangle is the image of the solid triangle. The center of dilation is (−5, 7) .
adell [148]
Before dilation:
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the width of the triangle is w₁ = 7 - (-5) = 12

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the width of the triangle is w₂ = -5 - (-8) = 3

The scale factor is h₂/h₁ = 2/8 = 1/4 = 0.25
Also, the scale factor is w₂/w₁ = 3/12 = 1/4 = 0.25

Answer: The scale factor is 0.25

3 0
3 years ago
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