Answer:
1) 2x^3-2x^2+4x+20
Step-by-step explanation:
line up the equations, having each variable aligned with the similar variable, and distribute the minus sign across the parenthesis
7x^3 + 4x + 13
-(5x^3 + 2x^2 - 7)
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2x^3 - 2x^2 +4x +20
Answer:
2
Step-by-step explanation:
4 people and 6 pretzels.
If you buy 2 packs you get 12 pretzels and each person gets 3
10%
This is because the original probability of getting a green marble is 1/3. There are 7 green marbles out of 21 which simplifies to that ratio.
The second probability is 3/10 since there will be 6 green marbles left out of 20 total marbles. This simplifies to that ratio.
Now we multiply the two ratios together.
1/3 * 3/10 = 3/30 or 1/10, which is equal to 10%
