Answer:
60
Explanation:
The multiples of 10 are 10,20,30,40,50,60,70 etc.
The multiples of 12 are 12,24,36, 48, 60
The smallest number which is a multiple of both 10 and 12 is 60
Or express both numbers in prime factor form:
10 =2x5
12=2x2x3
2 is common to both so the LCM is 2x2x3x5=60
Answer:
3x + 9 = 21
Step-by-step explanation:
Let Henry's age be x
Mary's age = 9 + 3x
21 = 9 + 3x
Can also be written as 3x + 9 = 21
Answer:
x=20
Step-by-step explanation:
45= measure of angle 6 (vertical angles)
45+ 5x+35 = 180 (Supplementary angles)
x=20
