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Renee J.
Tutor/Teacher for 10 years
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Biology
TutorMe
Question:

Outline the path of blood flow through the heart starting with where it enters the right atrium.

Renee J.
Answer:

Inferior/Superior Vena Cava-->Right Atrium-->Tricuspid Valve-->Right Ventricle-->Pulmonary Valve-->Pulmonary Artery-->Lungs-->Pulmonary Vein-->Left Atrium-->Bicuspid Valve-->Left Ventricle-->Aortic Valve-->Aorta-->Body

Algebra
TutorMe
Question:

7x+3y=4 7x+8y=12 Solve for x and y

Renee J.
Answer:

Subtract the two equations to eliminate "x" (7x+3y=4)-(7x+8y=12) -5y=-8 Divide by -5 to get y y=8/5 Plug y into one of the equations and solve for x 7x+8(8/5)=12 7x+64/5=12 7x=12-64/5 x=(12-64/5)/7 x=-4/35

Physics
TutorMe
Question:

A ball is dropped from the top of a building that is 300m high. How long does it take for the ball to hit the ground?

Renee J.
Answer:

Using kinematics and a y-direction down as positive: y_f=y_0+v_0*t+1/2*a*t^2 v_0=0m/s since it is dropped from rest y_f=300m, since it is where we finish y_0=0m since that is the height it is dropped from a=9.8m/s^2 t=unkown 300=0+0*t+1/2*9.8*t^2 300=1/2*9.8*t^2 Solve for t: t=sqrt(300*2/9.8)=7.8sec to hit the ground

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