Find the acute angle betwen the lines
(a) 2x - y=3, 3x+4y=7
(b) x+2y=7, 5x-y=2

How many different triangles can be constructed with the angle measurements of 134° 10° and 36° ?

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is