Book Maths Puzzle Algebra

HOW TO SOLVE THE FOLLOWING

4X squared + 17x squared = 15

x squared + 4x-5=0

3x squared+1=7x

Read Solution (Total 0)

Book Other Question

Ellen paddles 1 mi upstream, and 1 mi back inb a total time of 1 hr. The speed of the river is 2 mph. Find the speed of Ellen's paddleboat in still water. suppose m and n are positive intergers.
a)How many points (m,n) satisfy m+n < 5?
b)Graph them all. Plot m on the x-axis and n on the y-axis.