100% of 20 is 20. Now we have 30% to add to it.
We know 25% of 20 is 5 since 20/4 = 5.. Since 25% is close to 30% this is a close estimate.
We get 25 this way
Jack can swim 12 laps in 28 minutes. 28 minutes is 4 times greater than the time it took him to swim 3 laps. With 28 minutes he should therefore be able to swim 4 times as many laps. 3 times 4 equals 12
Answer:
4.875 billion hours
Step-by-step explanation:
-Let X be the total time spent on taxes and 7.8 billion (80%) is time on paper work.
#We equate and cross multiply to get the total time on taxes:
-let y be the 50% amount of time spent. we equate to find it in actual hours:
Hence, 50% of the time is equivalent to 4.875 billion hours
Answer:
11
Step-by-step explanation:
42 is also the degree for x so 42+42=84
there are 360 total degrees in a parallelogram
360-84=276
276 is divided by 2 as y and w are the same degrees
138 + 5 to find x and that is 143
143/13 is 11