What’s the least common multiple (lcm) for each group of numbers? a. 6 and 15 b. 4 and 11 c. 6, 9, and 12 d. 8, 10, and 20

Hello!

The least common multiple is the first multiple that both numbers have in common as shown below.

a.

6: 6, 12, 18, 24, 30

15: 15, 30

As you can see, the LCM is 30.

b.

4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44

11: 11,22,33,44

c.

6: 6,12,18,24,30,36

9; 9,18,27,36

12: 12,24,36

d.

8: 8,16,24,32,40

10: 10, 20, 30, 40

20: 20,40

Therefore, our answers are below.

a. 30

b. 44

c. 36

d.40

I hope this helps!

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5