Answer:
see explanation
Step-by-step explanation:
12
Since the denominators are like, add the numerators leaving the denominator
= 
= 
15
We require the denominators to be like before we can add.
factor x² - 4 as a difference of squares
x² - 4 = (x + 2)(x - 2)
Expressing as
+ 
multiply the numerator/denominator of the first fraction by (x - 2)
= 
+
Expand and simplify the numerators, leaving the denominator
= 
= 
Answer:
12 and 15 or
12 and 18 or
15 or 18
Step-by-step explanation:
The two numbers have to both be divisible by 3, since their greatest common factor is 3. This only leaves..
12, 15, or 18 (no other numbers between 10 and 20 are divisible by 3)
The factors of 12 are: 2, 3, 4, 6, and 12
The factors of 15 are: 3, 5, and 15
The factors of 18 are: 2, 3, 6, 9, and 18
All three numbers have 3 as a greatest common factor, so we have 3 pairs of numbers they could be...
12 and 15 or
12 and 18 or
15 or 18
2019-2=2017
Since 9 is the ones digit 9-2=7
5 65,749
13,149 R4 2.
6 22,176
3,696 R0 3.
5 25,931
5,186 R1
4.
4 71,568
17,892 R0 5.
7 98,694
14,099 R1 6.
9 81,844
9,093 R7
Y-12÷2
because it says 12 less than y we subtract y-12 but then it says divided by 2 so then it is reasonable to say y-12÷2
