The class was taking a survey of hair color for science class. Of the class, 5/12 had brown hair. Of the remainder of the class, 4/7 had blonde hair. If the rest had red hair, what percentage of the class had red hair? I did 5/12 x 4/7 which is equal to 5/21, but I was wondering how do I draw it as a tape diagram.

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925

the monthly balance will be $75,000

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15