Answer:
1. x^2−16
2. x^3+27
3. x^3−4x^2
4. x^2−9
Explanation: Step-by-step
1. Let's simplify step-by-step.
x2−16
There are no like terms.
2. Let's simplify step-by-step.
x3+27
There are no like terms.
3. Let's simplify step-by-step.
x3−4x2
There are no like terms.
4.Let's simplify step-by-step.
x2−9
There are no like terms.
An integer is a number and it's opposite.
A negative integer goes to the left of zero on the number line.
An example of a negative integer and it's opposite is:
negative integer: -10
opposite of the negative integer (the positive integer or additive inverse): 10
Answer:
4500 pages
Step-by-step explanation:
an hour has 60 minutes. This means in 1 hour the machine will scan 60/15 more pages. 60/15 =4.
1125*4 =4500 pages/hour
Answer:
um
Step-by-step explanation:
um
X - the amount of money Nina has
y - the cost of one widget
Nina has exactly enough money to purchase 6 widgets.
![x=6y](https://tex.z-dn.net/?f=x%3D6y)
If the cost of each widget was reduced by $1.25 (so the cost of one widget would be y-1.25), Nina would have exactly enough money to purchase 8 widgets.
![x=8(y-1.25)](https://tex.z-dn.net/?f=x%3D8%28y-1.25%29)
Substitute 6y for x in the second equation:
![6y=8(y-1.25) \\ 6y=8y-10 \\ 6y-8y=-10 \\ -2y=-10 \\ y=\frac{-10}{-2} \\ y=5 \\ \\ x=6y=6 \times 5=30](https://tex.z-dn.net/?f=6y%3D8%28y-1.25%29%20%5C%5C%0A6y%3D8y-10%20%5C%5C%0A6y-8y%3D-10%20%5C%5C%0A-2y%3D-10%20%5C%5C%0Ay%3D%5Cfrac%7B-10%7D%7B-2%7D%20%5C%5C%0Ay%3D5%20%5C%5C%20%5C%5C%0Ax%3D6y%3D6%20%5Ctimes%205%3D30)
Nina has $30.