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Over [174]
3 years ago
5

Please help with this question if you don't know the answer please don't answer show your work and I am gonna Mark you as a brai

nliest

Mathematics
1 answer:
Aleks04 [339]3 years ago
7 0

<u>Solution</u>:

<em>7/(-2.5 + 8.5) + {0.6 (8 + 13)}/-0.2</em>

= 7/6 + (12.6/-0.2)

= 7/6 - 63

= (7 - 378)/6

= -371/6

<em>(OR)</em>

= 61.8333... <em>(Decimal representation of -371/6 is non-terminating & recurring)</em>

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Emily is observing the velocity of a cyclist at different times. After four hours, the velocity of the cyclist is 14 km/h. After
lina2011 [118]
Assume that Emily starts from rest so that the velocity is zero at 0 hours.

Define the function v(t) for velocity in km/h, and t in hours.

Part A
From t=0 to t=4, v changes from 0 to 14.
Let v(t) = mt + b
The slope is
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  b = 0.
Therefore
v(t) = 3.5t,  for 0 ≤ t ≤ 4

Fromt=4 to t=9,  changes from 14 to 4.
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Therefore
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 14 = -2*4 + b = -8 + b
 22 = b
v(t) = -2t + 22, for 4 < t ≤ 9.

Answer:
The equation for the velocity is
v(t) = 3.5t,  0 ≤ t ≤ 4
      = -2t + 22,  4 < t ≤ 9

Part B
The equation for velocity is a piecewise function that is graphed as shown below. If we assume that the second part of the equation is valid at t=10, then
v(10) = -2*10 + 22 = 2 km/h

3 0
3 years ago
) y = 2x - 4<br> y = -3x + 1
tatiyna

Answer:

I think x = -8. Hope this helps!! :)

3 0
2 years ago
To buy the car new is $43,500.00 however, if you wait 18 months, it’s 55% cheaper. How much can you get the car for in 18 months
hram777 [196]

Answer:

$19575

$20945.25

Step-by-step explanation:

The current price of the car is $43500 but if I wait for 18 months, then it will be 55% cheaper.

So, the after 18 months the price of the car will be 43500(1 - \frac{55}{100}) = 19575 dollars.

If sales tax is 7%, then the total price of the car after waiting for 18 months will be 19575(1 + \frac{7}{100}) = 20945.25 dollars. (Answer)

4 0
3 years ago
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