which of the following expressions represents the least common multiple of 15, 18, and 25?
2 · 3 · 5
2 · 3 2 · 5 2
2 · 3 3 · 5 3
2 · 3 2 · 5 3

Step-by-step explanation:

we know that

The Least Common Multiple (LCM) of a group of numbers is the smallest number that is a multiple of all the numbers.

we have

15,18 and 25

Decompose the numbers in prime factors

Multiply common and uncommon numbers with their greatest exponent

so

The LCM is equal to

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

25.2

step-by-step explanation:

2+4x6-8/10= 25.2