Find product of 5 times 9 less than 3

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

52 cm radius = diameter = area = circumference = circumfer