The sum of a number and 16 times it's reciprocal is 10. Find the numbers

Measures of the angle of r, 31 s (x+4) t (3x+9)

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )