Answer:
C. 21
Step-by-step explanation:

Answer:
47, 40, 33, 26 are the first four terms of the sequence.
Step-by-step explanation:
Expression representing the sequence is,

where n = number of term in the sequence
For n = 1,

= 47
For n = 2,

= 47 - 7
= 40
For n = 3,
= 47 - 7(3 -1)
= 47 - 14
= 33
For n = 4,

= 47 - 21
= 26
Therefore, first four terms of the sequence are 47, 40, 33 and 26.
You have to use the Pythagorean theorem a squared plus b squared is c squared so 13 squared plus 18 squared equals c squared. 13x13=169 18x18=324 169+324=493 so c squared is 493 to get c you square root 493 which equals 22.2 so the diagonal, c, is 22.2 centimeters long
Answer:
Commutative Property of Addition
Step-by-step explanation:
If you are adding six and four together, the commutative property of addition says that you will get the same answer whether you are adding 6 + 4 or 4 + 6.
The word "commutative" comes from "commute" or "move around", so the Commutative Property is the one that refers to moving numbers around. For addition, the rule is "a + b = b + a"; in numbers, this means 6 + 4 = 4 + 6.