In a box of counters half are white, 1/10 are blue and 1/5 are green. the remaining eight are red. what is the total number of counters?
a. 10
b. 20
c. 30
d. 40
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An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

How do i do this activity, is appreciated