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andrew11 [14]
3 years ago
15

4n + 5n= -9? What is the answer?

Mathematics
2 answers:
uysha [10]3 years ago
8 0

Combine like terms:

4n+5n=-9\\ 9n=-9

Isolate the variable on one side of the equation:

9n=-9\\ n=-1

The answer is n=-1.

timurjin [86]3 years ago
6 0

add 4n and 5n, which is 9. 9n=-9, and if u divide both sides by nine, n=-1

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4 0
3 years ago
HURRY!!!!!!!!!<br><br> Given P(5,10,8) and Q(7,11,10), find the midpoint of the segment PQ.
rusak2 [61]

Answer:

P_{m}=(6,10.5,9)

Step-by-step explanation:

The mid point can be found with the formula

P_{m}=(\frac{x_{1}+x_{2} }{2},\frac{y_{1} +y_{2} }{2} ,\frac{z_{1}+z_{2}  }{2} )

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4 0
3 years ago
Algebra
vladimir2022 [97]
(2x + 3y = 12) x (-2)
(4x - 3y = 6) x 1

-4x - 6y = -24
4x - 3y = 6

You can cancel out the x values by adding the two equations together. 
(-4x + 4x) + (-6y - 3y) = (-24 + 6)
-9y = -18
y = 2

Solve for x now...
4x - 3(2) = 6
4x - 6 = 6
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x = 3

Check... (x = 3, y = 2)
2(3) + 3(2) = 12 
6 + 6 = 12
12 = 12 <- this works! 

4(3) - 3(2) = 6
12 - 6 = 6
6 = 6 <- this works!
5 0
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sattari [20]
8y - 11y + 6

Combine like terms

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