Given a mortgage of $288,000 at 3% for 30 years, how much of the first monthly payment is interest?

What is not true about kl and mn? what is mn? (show your work)

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.