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Rus_ich [418]
3 years ago
8

(4x+2y-6z) + (5y-2z+7x) + (-9z-2x-3y)

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
7 0

Answer:

9x+4y-17z

Step-by-step explanation:

first open brackets with d signs

dat is= 4x+2y-6z+5y-2z+7x-9z-2x-3y

collect like terms and = 4x+7x-2x+2y+5y-3y-6z-2z-9z= 9x+4y-17z

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A high speed train travels a distance of 503 km in 3 hours.
tensa zangetsu [6.8K]

The average speed, in km/minute, of the train is 2.79 km/minute

<h3>Calculating average speed </h3>

From the question, we are to calculate the average speed in km/minute

From the given information,

Distance travelled = 503 km

Time taken = 3 hours = 3 × 60 minutes = 180 minutes

Using the average speed formula,

Average speed = Distance / Time

∴ Average speed of the train = 503 / 180

Average speed of the train = 2.79 km/minute

Hence, the average speed, in km/minute, of the train is 2.79 km/minute

Learn more on Calculating average speed here: brainly.com/question/12025128

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3 0
2 years ago
Need help, Write the equation of the line that passes through the points (-2, -3) and (8,3) first in point-slope form, and then
Allushta [10]

Answer:

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Step-by-step explanation:

3 0
3 years ago
15)<br> Solve for X<br> X\42=6<br> A)<br> 7<br> B)<br> 252<br> C)<br> 260<br> D)<br> 332
Vikentia [17]

Answer:

b)252 is the answer

Step-by-step explanation:

x\42=6

x=6*42

x=252

5 0
2 years ago
I need help with this ​
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Yes it’s a rectangle because the diagonals bisect each other, and they are equal in length.
7 0
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What is the equation of a circle with center (5, -8) and diameter 4?
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