Answer:
24
Step-by-step explanation:
Answer:
4x^2 +2x +16
Step-by-step explanation:
7x2 + 4x + 10) - (3x2 + 2x - 6)
Distribute the minus sign
7x2 + 4x + 10) - 3x2 - 2x + 6
Combine like terms
7x2 + 4x + 10)
- 3x2 - 2x + 6
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4x^2 +2x +16
<h3>
Answer: 62</h3>
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Explanation:
18 people get off, and 21 get on
We can write the 18 as -18 to indicate a loss of 18 people. The 21 as +21 to mean we gained 21 people.
The net change is -18+21 = +3 or simply 3.
After the first stop, 3 more people are on the train compared to before reaching this stop.
If x is the number of people before the stop, then x+3 is the number of people after the stop. Set this equal to 65 and solve for x.
x+3 = 65
x = 65-3
x = 62 people were on the train to begin with.
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Check:
62 people to start off
62-18 = 44 people after the 18 people get off
44+21 = 65 people after the 21 new people get on
The answer is confirmed.
Answer:
13y + 12 + x
Step-by-step explanation:
So your problem is 12y + 4 + x - 7y + 8 + 8y.
What you want to do first is line the variables up, so line the y's up, and then line the number without the variables, and then the x can go at the end.
So now you should have 12y - 7y + 8y + 4 + 8 + x
After that, you want to subtract 7y from 12y which gets you 5y.
So now it should look like 5y + 8y + 4 + 8 + x
After that, add 8y and 5y together to get 13y
13y + 4 + 8 +x
Add the 4 and the 8
13y + 12 + x
And that should be your answer
