Larry practiced basketball 20 times in 5 weeks. His brother practiced basketball 12 times in 21 days. Are the rates at which each brother practiced equivalent? Explain your reasoning.

No, they are not same

Step-by-step explanation:

20 times— 5 weeks

12 times— twenty one also 3 wks

20: 5

12: 3

not same

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.