The answer answer is x=5 (y-3)
For this case we have the following rule of three:
12 ----> 100%
8 ------> x
Clearing x we have:
x = (8/12) * (100)
x = 66.66666667% (percentage of correct answers)
For 20 baskets we have:
20 -----> 66.66666667%
x -------> 100%
Clearing x we have:
x = (100 / 66.66666667) * (20)
x = 30 attempts
Answer:
To make 20 canatas, 30 attempts must be made.
Let s and d represent the number of sit-ups Jerry does and the number of days Jerry has been doing them (not counting the first), respectively. The problem statement tells us
s = 16 + 2d
This is the equation that can be solved to find d.
_____
Here is its solution.
Since we want to find d (the number of days), we can subtract 16 and divide by 2.
s - 16 = 2d
(s - 16)/2 = d
d = (s/2) - 8
Example:
Today Jerry did 22 sit-ups. He has been doing them for ...
(22/2) - 8 = 11 - 8 = 3 . . . days
A steamer going downstream traveled the distance between two ports in 3 hours. The return trip took 3 hours 40 minutes. Find the speed of the water current if the speed of the steamer in still water is 18 mph.
distance = D
return trip time (RT) = 3 hours 40 minutes.
speed of the water current = VW
steamer speed (SS) = 18 mph
direct trip time (DT) = 3 hours
D = DT x (18 + VW) = 3(18 + VW) = 54 + 3VW
D = RT x (18 -VW) = 3.666 x (18 - VW) = 66 - 3.666VW
54 + 3VW = 66 - 3.666VW
3VW + 3.666VW = 66 - 54
6.666VW = 12
VW = 1. 8 mph
Answer:
6
Step-by-step explanation: