-2.5(1-2n)-1.5n
=-2.5+5n-1.5n
=-2.5+3.5n
Answer: B. -2.5+3.5n
18 bytes looked it up online lol
Answer:
809, 708, 607, 506, 405, 304, 203, 102, 1, -100
Step-by-step explanation:
809, 708, 607, _____, _______
First term = 809
Second term = 708
Third term = 607
Difference between first term and second term = 809 - 708
= 101
Difference between second term and third term = 708 - 607
= 101
Therefore, the common difference is 101
Fourth term = 607 - 101
= 506
Fifth term = 506 - 101
= 405
Sixth term = 405 - 101
= 304
Seventh term = 304 - 101
= 203
Eighth term = 203 - 101
= 102
Ninth term = 102 - 101
= 1
Tenth term = 1 - 101
= - 100
809, 708, 607, 506, 405, 304, 203, 102, 1, -100
When multiplying numbers, it doesn't matter which number is first or second.
The correct answer is: Commutative Property of Multiplication
All exercises involve the same concept, so I'll show you how to do the first, then you can apply the exact same logic to all the others.
The first thing you need to know is that, when a certain quantity multiplies a parenthesis, you can distribute that number to every element in the parenthesis. This means that

So,
is multiplying the parenthesis involving
and
, and we distributed it:
multiplies both
and
in the final result.
Secondly, you have to know how to recognize like terms, because they are the only terms you can sum. Two terms can be summed if they have the same literal expression. So, for example, you cannot sum
, and neither
exponents count.
But you can su, for example,

or

So, take for example exercise 9:

We distribute the 1.2 through the first parenthesis:

And you can distribute the negative sign through the second parenthesis (it counts as a -1 to distribute):

So, the expression becomes

Now sum like terms:
