2*100*64=? Just use a calculator to find the answer
Lucia can afford 11 hours of lessons
Second one is 2.7
f(x) is the total number of hours overall that he has worked out.
x would be the number of weeks he works out.
You would multiply x ( number f weeks he works out) by 7 and then add that to the hours he already worked out (15) which will give you the total hours (f(x)).
