11) 7 + -10+(4(5+-3)) = 7+-10+8=5
12) (12 +-10)+3x+-1(2x+4x), 12+-10x+3x+-2x+-4x = 12+-13x
Y=x. I hope that this helped! Good luck! :)
The angular velocity is 16 radians per second
<u>Solution:</u>
The angular velocity of point is given by formula:

Where,
w is the angular velocity in radians
v is the linear velocity
r is the radius
Given that diameter of wheel is 10 feet


Thus radius is 5 feet
A point on the rim of a wheel moves with a velocity of 80 feet per second
Linear velocity = v = 80 feet per second
Therefore, angular velocity is given as:

Thus angular velocity is 16 radians per second
Answer:
It will take her 3 hours to read 120 pages.
Step-by-step explanation:
The number of pages read(y) after x hour can be modeled by a linear function in the following format:

In which a is the number of pages read per hour and b is the initial number of pages read.
A straight line goes through (0, 0)
This means that when 
So



(0.5, 20)
When 
So




The function in:

According to the graph, which statement must be true?
It will take her 2 hours to read 60 pages.

Less than 2 hours for 60 pages, so this is false.
It will take her 3 hours to read 120 pages.

This statement is true.
It will take her 4 hours to read 180 pages.

More than 4 hours to read 180 pages. So false.
It will take her 5 hours to read 210 pages.

More than 5 hours to read 210 pages. So false.
Answer:
Step-by-step explanation:
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