Jordan scores a 53 On his math test. The class average is 57 with a standard deviation of two points. How many standard deviations below the mean did Jordan score?

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

answer is  

c.

36

step-by-step explanation:

3

step-by-step explanation: