Explanation:
Distributive property: → 
Multiply by the numbers from left to right.

Then, you can also divide into the numbers.


Product it's going to be multiply by the numbers, fractions, factors, and multiples.
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1/2 × 1/2
1/4 or 25%
probability of tails both times
Answer:
500 phones
Step-by-step explanation:
cost of manufacturing: y = 80x + 10,000
money from phone sales: y = 100x
* note: x = #phones
solve for when they're equal;
100x = 80x + 10,000
100x - 80x = 80x - 80x + 10,000
20x = 10,000 –––––––––––> divide both sides by 20
x = 500