Answer:
A
Step-by-step explanation:

x+2=0
x+2-2=0-2
x=-2.....(x+2) was squared...exponent of 2...multiplicity of 2
x-4=0
x-4+4=0+4
x=4....(x-4) has no visible exponent which means it is essentially to the power of 1...multiplicity of 1
x+1=0
x+1-1=0-1
x=-1....(x+1) was cubed...exponent was 3...multiplicity of 3
Step-by-step explanation:
Scientific notation is a way of expressing numbers that are too big or too small to be conveniently written in decimal form.
For example, instead of writing 0.0000000056, we write 5.6 x, 10^-9
Mixed numbers are greater than one it wouldn't make sense for a mixed number to be less than one, because then it would just be a regular fraction.
<span>You can only get a bigger number if you divide by a number less than one. That means you can't divide 15 by a mixed number and get a bigger number.</span>
Do the (3x=6) first than the outside of the prenthesies
Answer: -1+6y+7x
To simplify expressions, you have to be able to combine like terms (eg. 3x and 2x to get 5x). Since there are none in this expression, and you can't combine y and x, this expression can't be simplified.
*If it helps, think of x and y as different types of candy... ;3
For example, you can't combine 12 Skittles (x) and 4 Reese's (y), because they aren't the same. So, you'd write that you have 12 Skittles and 4 Reese's.
Hope this helps,
LaciaMelodii :)