I think it’s either 8 or negative 8
Answer:
Option A.,
Step-by-step explanation:
(5x3− x + 14) − (3x2− 9x + 4)
First remove the 2 sets of parentheses. Note when we remove the second one we multiply the terms inside by -1. ( Or we might say we distribute the negative over this parentheses.)
= 5x^3 - x + 14 - 3x^2 + 9x - 4
Now we simplify like terms:-
= 5x^3 - 3x^2 + 8x + 10 (answer).
Answer:
The equation of <em>Z</em> is: 
Step-by-step explanation:
- The first child is of age 1 year.
Then the amount invested for the 1-year old is: 
- The second child is of age 3 years.
Then the amount invested for the 3-year old is: 
- The third child is of age 6 years.
Then the amount invested for the 6-year old is: 
The one-time investment will be:

Answer:
Step-by-step explanation:
Simplifying
3(2x + -1) = 21
Reorder the terms:
3(-1 + 2x) = 21
(-1 * 3 + 2x * 3) = 21
(-3 + 6x) = 21
Solving
-3 + 6x = 21
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '3' to each side of the equation.
-3 + 3 + 6x = 21 + 3
Combine like terms: -3 + 3 = 0
0 + 6x = 21 + 3
6x = 21 + 3
Combine like terms: 21 + 3 = 24
6x = 24
Divide each side by '6'.
x = 4
Simplifying
x = 4