<span>Round trip for robot, because it has to get to the destination and back = 3 miles
Rate of robot is 4 miles per hour.
t = time for robot to make delivery.
4r = 3
r = 3/4 = 0.75
It will take the robot 0.75 hours to make the delivery and come back to re restaurant.</span>
Answer:
x=8
Step-by-step explanation:
If the value of x varies directly as the value of y we can say they are directly proportional. This implies that when y increases x will increase too, and when y decreases x will also decrease.
If x=16 when y=3/4 we can write their relation as:
x/y = 16/(3/4) = 16*(4/3) = 64/3
So, for every value of y, the ratio x/y must maintain equal to 64/3 because both values are proportional.
Now we can see what happens to x when y varies. If y=3/8:
x/(3/8) = 64/3
Multiply both sides by 3/8 to eliminate the 3/8 in the denominator.
x/(3/8) * (3/8) = (64/3) * (3/8)
See that we have a 3 multiplying and another dividing, we can eliminate them.
x = 64/8
x = 8
So, if y decreases to 3/8 x will decrease to 8. Notice that y is decreasing in a half as 3/8 is the half of 3/4, and x is also decreasing in a half from 16 to 8, what makes sense.
So the change was 3000 feet.
And the amount of time was 15 minutes.
So by dividing 3000 by 15, you get about 200 feet per minute.
To check your answer when you do problems like this
Multiply the number of feet per minute, the answer of 200, by 15.
And it got 3000 so it's correct.
Answer:
B
Step-by-step explanation: