Answer:
1/3 = x
Step-by-step explanation:
Answer:
Cost of each hat: $5
Cost of each mask: $3
Step-by-step explanation:
Let be "x" the cost in dollars of a party hat and "y" the cost in dollars of a mask.
Set up a System of equations using the information given in the exercise:

You can use the Elimination Method to solve this System of equations:
1. You can multiply the first equation by -1.
2. Then you must add the equations.
3. Solve for "y".
Then:

4. Now you can substitute the value of "y" into any original equation.
5. Finally, solve for "x" in order to find its value.
Then:

Answer:
C) (x - 3)
E) (x - 10)
Step-by-step explanation:
x² - 13x + 30
x² - 10x - 3x + 30
x(x - 10) - 3(x - 10)
(x - 10)(x - 3)
D. 7/10 of newspapers and a. 1/8 pound