18 patients
25 min = 0.4166 hours
7.5 hours / 0.4166 = 18
Simple way of finding the decimal value : -
=> 46/200
Divide numerator and denominator by 2
=23/100
As 100 is in denominator, shift decimal by 2, i.e
= 0.23
Answer = 0.23
X = -3/2
I hope my work .... helped you out a little.
J)x^2 +2x +yx+2y-5x-10
x^2-3x+yx-10
k)5y^2(1-2y)
l)a(x+y+z)
Sorry if I'm wrong but I think the answer is B