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:
252 calories burned in 1 hour.
Step-by-step explanation:
She burns 756 calories in 3 hours.
She burns x calories in 1 hour
756/3 = x/1
756/3 = x
252 = x
So she burns 252 in 1 hour.
Start with the parentheses first
4.6 -4.4+7.8 then calculate from left to right
= 0.2+7.8 = 8
