I'm in a physics 1 honors course at my highschool and we have been working on projectile motion problems. I'm very confused on how to solve this problem though more because of the math than the physics I think. The problem asks for the initial velocity of a spear that was thrown at a 35 degree angle with respect to the horizontal. The only other information given is that the spear was thrown a total horizontal distance of 201.24 meters. I first used the equation dy=Viyt+1/2ayt2 and eventually came to t=Visin35/4.9 after that i plugged it into the same equation but for the x components and got as far as: 201.24=Vicos35(Visin35/4.9) what do I do after that to solve for Vi?