Determine the LCM of the following numbers: 30 and 105.

LCM(30;105)=210: least common multiple, calculated.

Step-by-step explanation:

30= 2x3x5

30 is not a prime, is a composite number;

105=3x5x7;

105 is not a prime, is a composite number;

*Positive integers that are only dividing by themselves and 1 are called prime numbers. A prime number has only two factors: 1 and Itself.

* A composite number is a positive integer that has at least one factor (divisor) other than 1 and itself.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

answer: 177/8

step-by-step explanation: