The x in -2x gets substituted with 0 since we don’t know what x equals
Hope this helped !!
Answer:
-8+14x
Step-by-step explanation:
By distribution, -2(4-7x) = -8+14x
The speed when the power is 2000watts is 22.5m/s
<h3>Subject of formula </h3>
If the power, P (watts), of a car engine is proportional to the square of its
speed, s(m/s), this is expressed as:
P = k/s
When s=25, P=1800 then;
1800 = k/25
k = 25 * 1800
k = 4500
In order to calculate the speed when the power is 2000;
s = k/p
s= 4500/2000
s = 22.5m/s
Hence the speed when the power is 2000watts is 22.5 m/s
Learn more on inverse here: brainly.com/question/3831584
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It would take her 280 minutes.
Solving: 35/14= 2.5. 2.5•112 = 280