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son4ous [18]
3 years ago
8

Given: Q = 7m + 3n, R = 11 - 2m, S = n + 5, and T = -m - 3n + 8.

Mathematics
2 answers:
svetoff [14.1K]3 years ago
6 0
D -3m-4n+14. Once you write out the equation, you have to combine all the like terms, also known as simplifiying
Anni [7]3 years ago
5 0

Answer:

Option D is correct

-3m -4n +14

Step-by-step explanation:

Given:

Q = 7m + 3n,

R = 11 - 2m,

S = n + 5, and

T = -m - 3n + 8.  

We have to Simplify R-S+T

R -S +T = 11 - 2m - (n+5) + (-m -3n +8) = 11 - 2m-n-5-m-3n+8

Combine Like terms we have;

R -S +T = -3m -4n +14

Therefore, the Simplification of R -S +T is, -3m -4n +14

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From a train station, one train heads north, and another heads east. Some time later, the northbound train has traveled 27 kilom
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Answer: the eastbound train had travelled 12 miles
Explanation: using Pythagoras theorem, we know that
X^2 = a^2 + b^2
Where ^ stands for raised to power.
Let
a stand for the train going towards North and
b stands for the train going towards east.
X stands for the total distance between train a and b = 20 miles.
By Pythagoras rule
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20^2 = 16^2 + b^2
400 = 256 + b^2 so that
b^2 = 400 - 256 = 144
b = √144
b = 12 miles.
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Step-by-step explanation:

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