David wants to arrange the cars on his car lot. He wants to park the cars in rows with the same number of each type of car in each row. What is the greatest number of rows David can have?

84

Step-by-step explanation:

18=2x3x3

36=2x2x3x3

72=2x2x2x3x3

Find all prime factors common to all three factorizations.

They are 2, 3 and another 3; GCF=2x3x3=18

row 1 18 cabooses

row 2 18 engines

row 3 18 engine

row 4 18 boxcars

row 5 18 boxcars

row 6 18 boxcars

d is the answer

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