Layla answer 21 of the 25 questions on his history test correctly. what decimal represents the fraction of problem he answer incorrectly.

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Find the value of x that will make l ll m