Book Maths Puzzle General Mental Ability

A 50-pound bag of dog food is a mixture of two brands. Brand A costs $4 per lb, and brand B costs $2 per lb. The mixture is worth $2.68 per lb. How many pounds of eac brand shou

Read Solution (Total 0)

Book Other Question
A triangle has a perimeter of 197 cm. The sum of the smallest and medium sides is 49 more than the longest side. The difference between the longest and shortest sides is 22. Find the legth of all three sides.



HELP!



I know I have to solve by coming p with a system of equation, what I have is:

X=longest, Y=shortest, Z=medium



Y + Z = X + 49

X - 22 = Y

X + Y + Z = 197



Thank you for your time. For the following 3rd order polynomial equation, how do I solve for x?
y = a + bx + cx^2 + dx^3