The process is similar to (and easier* than) adding three 4-digit numbers. Add the numbers in each column.
The sum is ...
(2+1-3)x³ +(-4+6+2)x² +(6-8-4)x +(-3+12-7)
= 0x³ +4x² -6x +2
The sum is 4x² -6x +2
_____
* The process is easier because there are no "carry" operations from one column to another as there may be when adding multi-digit numbers.
Answer:
The ratio between them is approximately
, therefore the correct answer is A.
Step-by-step explanation:
In order to calculate the ratio of the diameter of the Sun to the diameter of the Earth we will first represent the Earth's diameter as a scientific notation, to do this we will add one to the power of ten for every time the comma walks to the left until there's only one number to the left. This is done to make the division easier,

The ratio is given by the Sun's diameter divided by the Earth's, as shown below:

The ratio between them is approximately
, therefore the correct answer is A.
65.0
This is because 4 is not a big enough number to round up, so you must round down. When it is 5 and over, you can round up.
Answer:
6x(-x+3)
Step-by-step explanation:
-6x^2+18x
factor out 6x
6x(-x^2+3)
10 groups of 2 s and 1 a
2 groups of 10 s and 5 a
5 groups of 4 s and 2 a