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Genrish500 [490]
3 years ago
5

In the first 120 miles over 240 mile journey a truck driver maintained an average speed of 50 mph what was his average featuring

the next 120 miles if the average speed of the entire trip with 60 mph
Mathematics
2 answers:
Keith_Richards [23]3 years ago
3 0
The correct answer is 70 MPH because when 50 and 70 are added together and divided by 2, you get 60.
julsineya [31]3 years ago
3 0
The average speed over the entire trip was 60 mph, which must equal the distance traveled (240 miles) times the elapsed time.  Dividing  60 mph into 240 miles gives us the elapsed time:  (240 miles) / (60 mph) = 4 hours total.

Next:  determine the length of time required to drive the first 120 miles at 50 mph.  It is (120 miles) / (50 mph), or 2.4 hours.

Next, find the length of time required to drive the second 120 miles.  It is 4 hours less 2.4 hours, or 1.6 hours.

Lastly, find the average speed over which the second 120 miles were covered in 1.6 hours:

average speed (2nd 120 miles) = (120 miles) / (1.6 hours) = 75 mph.
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What is the value of a in the equation 3a + b = 54, when b = 9?
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3a + b = 54
Substitute b for 9
3a + 9 = 54
Subtract 9 to both sides
3a = 45
Divide 3 to both sides
a = 15
6 0
3 years ago
Pleaseee tell me if im right!! I already solved and my answer is 84 square units, but im not sure.. pleaseee help me
yawa3891 [41]

Answer:

84

Step-by-step explanation:

12*5=60

4*6=24

60+24=84

8 0
3 years ago
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Carol sold twice as many magazine subscriptions as Jennifer. If Carol and Jennifer sold 90 subscriptions in all, how many subscr
goblinko [34]
Hello there!

Carol would have sold 60 subscriptions and Jenifer would have sold 30

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3 0
3 years ago
The Blazers hockey team has won 7 of its first 12 games.
Step2247 [10]

Answer:

The Rockets' team has the better record.

Step-by-step explanation:

  • The Blazers hockey team has played 12 games but they won only 7 out of the 12 games, so that means that they loss the other 5 games. So that makes the Blazers record 7 wins and 5 losses.

  • The Rockets' team has played 8 games but they won only 5 out of the 8 games, so that means that they loss the other 3 games. So that makes the Rockets' record 5 wins and 3 losses.

  • So, the Rockets' team has the better record because they loss less games than the Blazers team did.
4 0
3 years ago
Three consecutive even integers have a sum of -126. What is the smallest integer ?
SSSSS [86.1K]

Answer:

-40, - 42 and -44

Step-by-step explanation:

The fastes way here is trying. Lets pick a number, intelligently, and then work on it.

We need three even integers that sum -126. These will be all negative numbers and as they are consecutive they will be very similar (for example, -33 and -35 and -37). Thus, lets start by 1/3 of -126, which is -42:

(-42)+ (-44) + (-46) = - 132, so -42 no.

Lets go a step back: -40

(-40) + (-42) + (-44) = -126

So, the integers are -40, -42 and -44

5 0
3 years ago
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