On a trip to Waco, Texas, Steve drove at a constant rate of 60 miles per hour for 3 hours. Steve’s brother makes the same trip i
n 2.5 hours. About how fast does Steve’s brother drive on this trip ?
A. 67 miles per hour
B. 72 miles per hour
C. 75 miles per hour
D. 50 miles per hour
A. 67 miles per hour
B. 72 miles per hour
C. 75 miles per hour
D. 50 miles per hour
1 answer:
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Answer:
Step-by-step explanation:
By definition, a direct varition is expressed as following:
Then, <em>y </em>is directly proportional to <em>x </em>and <em>k</em> is the constant of variation.
Therefore, given the direct variation:
You must solve for the variable <em>y </em>as you can see below:
Therefore, as you can see, the constant of variation is the following:
Answer:
$0.0646 is the expected value of the draw.
Step-by-step explanation:
1 nickel = 5 cents
1 dime = 10 cents
1 penny = 1 cent
Total number of coins =
Probability that a nickel is selected is = 14/35
Probability that a dime is selected is = 15/35
Probability that a penny is selected is = 6/35
So, the expected value of the draw will be =
= 6.457 cents ≈6.46 cents
So, in dollars it is = = $0.0646
So, $0.0646 is the expected value of the draw.