What is the unknown of the following problem, "A train travels from Chicago to Pittsburg at an average speed of 85 miles per hour while another train travels from Pittsburg to Chicago at an average speed of 60 miles per hour. How much time would pass until they meet?"

what is all that apply?

x = 3 ± √(5+y)

the olimpics is not going to wokk out

step-by-step explanation:

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629