book Maths Puzzle Numerical Ability

Solve by substitution -

8x - 4y = 16
y = 2x - 4

Read Solution (Total 0)

book Other Question

A boat travels at the speed of 20 Miles per hour in still water. It travels 48 miles up stream, and then returns to the starting point in a total of five hours. The speed of the current is ____ miles per hour. How do use a half-angle formula to find the exact value of sin 7pie/8 ?