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vekshin1
3 years ago
15

I’m clueless! Can someone explain how to do this question step by step? Thanks! Extra points!! What is the average (arithmetic m

ean) of 4x + 5, 7x-6, and -8x+2?
Mathematics
1 answer:
ololo11 [35]3 years ago
4 0

Answer:

x+ 1/3 is the average

Step-by-step explanation:

To find the mean, add the terms together and then divide by the number of terms.  There are 3 terms

(4x + 5+ 7x-6 + -8x+2)/3

Combine like terms

( 3x+1)/3

x+ 1/3 is the average

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7 + (5 – 9)2 + 3(16 ÷ 8).
xeze [42]

Answer:

5

Step-by-step explanation:

7 + (5 - 9)2 +3(16/8)

7 + (-4)2 +3(2)

7+(-8) +6

7 -8 +6

7 -2

5

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3 years ago
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What is the slope of line m?
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A number is being multiplied by a power of 10. Find the number.
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3 years ago
A commercial jet can fly 868 miles in 2 hours with a tailwind but only 792 miles in 2 hours into a headwind. Find the speed of t
erik [133]

Answer:

The speed of the jet in still air is 415 mph and the speed of the wind is 19 mph

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

Let

x -----> the speed of the wind in miles per hour

y ----> the speed of the jet in still air in miles per hour

we know that

<em>With a tailwind</em>

y+x=\frac{868}{2}

y+x=434 ----> equation A

<em>With a headwind</em>

y-x=\frac{792}{2}

y-x=396 ----> equation B

solve the system of equations A and B by elimination

Adds equation A and equation B

y+x=434\\y-x=396\\------\\y+y=434+396\\2y=830\\y=415

<em>Find the value of x</em>

y+x=434

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The speed of the jet in still air is 415 mph and the speed of the wind is 19 mph

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