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dedylja [7]
2 years ago
13

A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip?.

Mathematics
1 answer:
suter [353]2 years ago
8 0

Analyze problem

since the distance is the same, we will not need to do any solving in that part

so, the average of 80 and 100 is

(80+100)/2

which is 90

so, 90 miles per hour

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olga55 [171]

Answer:

Step-by-step explanation:

y = 1/3x + 6

y = 1/4x + 3

this is just a matter of substitution...subbing in one y for the other

y = 1/3x + 6.....so sub in 1/3x + 6 in for y, back into the second equation or u can work it the other way and sub in 1/4x + 3 in for y, back into the first equation....either way will work

1/3x + 6 = 1/4x + 3

1/3x - 1/4x = 3 - 6

4/12x - 3/12x = -3

1/12x = -3

x = -3 * 12

x = - 36

now sub that back into either of ur original equations to find y

y = 1/3x + 6

y = 1/3(-36) + 6

y = - 12 + 6

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solution is : x = -36 and y = -6 or (-36,-6)

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3 years ago
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Gre4nikov [31]
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4 0
2 years ago
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Answer:

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3 0
3 years ago
Find the inverse of each function.<br> g(n) = 2n+6/7
bulgar [2K]

Answer- 7n-6/2

Step by step explanation-

solution,

here

Given,

g(n)=2n+6/7

Let g(n) be y

So,

Interchanging the position of n and y we get the reverse So,

n = 2y+6/7

or, 7n = 2y+6

or, 7n-6 = 2y

or, 7n-6/2 = y

Therefore the inverse function of g(n) is 7n-6/2

Thank you.

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3 years ago
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levacccp [35]

Answer:

C.

Step-by-step explanation:

(-90) + (-20) + 100 = -10

Hope I Helped! :)

8 0
3 years ago
Read 2 more answers
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