<span>8a + 4b - 7a -3b
=8a -7a +4b -3b
=a +b</span>
Answer:
-21/32
Step-by-step explanation:
It's easier to do this multiplication mentally if we rewrite the expression as follows:
-3 7 -21
------ * ------ = ---------
4 8 32
The answer is
false. Take a look at the attachment to see why. Hope it helps! :)
Answer:
The mean would be 14.4 hours.
Step-by-step explanation:
In order to find the mean, or average, of the numbers, you would add all the numbers together.
17 + 15 +14 + 14 + 12 which equals 72
Then, you take the total which is 72, and divide it by how many numbers you added together which is 5.
72/5 = 14.4
Answer:
The average rate of speed is 65.33 miles per hour.
Step-by-step explanation:
Total Distance = 196 miles
Time required = 180 minutes.
Now time is given in minutes we need to convert in hours.
60 minutes = 1 hours
180 minutes = number of hours in 180 mins
By using Unitary method we get;
Number of hours in 180 mins = 
Hence Time taken = 3 hrs
We need to find the speed.
Speed can be calculate by dividing Total distance with Time taken to travel the distance.
Speed = 
Hence the average rate of speed is 65.33 miles per hour.