3 years ago

HELP I NEED HELP ASAP

Mathematics

1 answer:

lawyer [7]3 years ago

6 0

Answer:

i think is B hope it helped sos if its wrong

Step-by-step explanation:

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A motor vehicle has a maximum efficiency of 39 mpg at a cruising speed of 40 mph. The efficiency drops at a rate of 0.1 mpg/mph

svp [43]

Answer:

38 mpg

Step-by-step explanation:

Initial efficiency = 39 mpg

Initial speed = 40 mph

Final speed = 50 mph

The efficiency drop between 40 mph and 50 mph is given by:

$E_d = 0.1 \frac{mpg}{mph}*\Delta V$

The total efficiency drop from 40 to 50 mph is:

$E_d = 0.1 \frac{mpg}{mph}*(50-40)mph\\E_d = 1\ mpg$

Therefore, the efficiency at 50 mph is:

$E_{50} = E_{40} -E_d\\E_{50} = 39 -1\\E_{50} = 38\ mpg$

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The one number is 3 less than 5 times another number. Their sum is 81. List the numbers.

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He has 13 nickles and 3 dimes

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Jackie cut a 2 yard spool into 5 equal lengths of ribbon?

lidiya [134]

5 units = 2 yd.
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Answer:

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Step-by-step explanation:

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