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Solve the simultaneous equations: 3x + 4y = 5 , 2x - 3y = 9

To solve the equations the first step to take is to eliminate one of the variables x or y so we can get the value of it and then substitute it back in to get the value of the other.
One way to do thi...

Answered by Yunis B. • Maths tutor

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Explain how a reflex action is coordinated

A reflex action is a way for the body to automatically and rapidly respond to a stimulus. It is able to work so fast because it bypasses the brain. The process is as follows:The stimulus (e.g Pressure, Te...

Answered by Harry E. • Biology tutor

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Given that y =2x^3 + 3/(x^2), find a) dy/dx and b) the integral of y

a) It is useful to rewrite the equation using power rules, so we get y = 2x³ + 3x^-2Now we can simply use the differentiation rules where we multiply the coefficient (number before x)...

Answered by Balint S. • Maths tutor

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Alex's rocket lands after 4.56s and Billy's lands after 5.21s. What was the initial (maximum) vertical velocity of both of their rockets as they left the launchpad to 3s.f.?

Application of suvat equation v=u+at. Students acknowledge that at the rocket's maximum height it will have a velocity of 0. They also realise that the time to reach thi s point from launch is half ...

Answered by • Physics tutor

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Draw a diagram of the forces acting on the rocket as it flies vertically upwards, the rocket is flying through air not a vacuum (it's not in space yet!)

They should draw a vague rocket shape pointed upwards. It will have one arrow pointing straight down through the rocket marked "gravity", "g", or "g=9.81kg m/s^2" etc. Anothe...

Answered by • Physics tutor

2064 Views