Answer: 3a + 2c = 73 (last night)
2a + 5c = 89 (last week)
Step-by-step explanation:
It is given that the bottle temperature begins at the freezer temperature of –16° C. Thus, the initial temperature is –16° C.
Now, sitting on the kitchen counter, the bottle temperature will go up a steady 9.6° C every hour. We need to know how many hours will it take to reach 20° C.
Let us assume that it will take "
" hours to reach the required temperature. Then the equation that will guide this system will be a linear one as shown below:
![-16+9.6x=20](https://tex.z-dn.net/?f=%20-16%2B9.6x%3D20%20)
Adding 16 to both sides we get:
![9.6x=20+16=36](https://tex.z-dn.net/?f=%209.6x%3D20%2B16%3D36%20)
Dividing both sides by 9.6 we get:
hours
Thus it will take 3.75 hours (or 3 hours 45 minutes) for the bottle of maple syrup to reach a temperature of
celsius.
Answer:
2/7
Step-by-step explanation:
7x=2
x=2/7
The spring stretch by 80cm if a spring constant 0.5 m has a force of 40 newtons applied to it
<h3>How to calculate the force acting on string?</h3>
According to Hookes law
F = ke
where
F is the applied force = 40N
k is the spring constant
e is the extension = 0.5
Substitute
40 = 0.5e
e = 40/0.5
e = 80cm
Hence the spring stretch by 80cm if a spring constant 0.5 m has a force of 40 newtons applied to it
Learn more on hookes law here: brainly.com/question/12253978