3 ÷ 1/4. Home work again :(

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?