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A person weighs 620N on Earth. The gravitational constant on Mars is 3.8m/s^2. How much does this person weigh on Mars?

If the person weighs 620N on Earth, their mass is 620/9.8=63.3kg on Earth. Therefore applying F=ma they must weigh 63.3*3.8=240N on Mars.
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Answered by Tomas M. • Physics tutor
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Solve for x: y=x^2-x-12

Apply the quadratic formula with a=1, b=-1, c=-12. This gives x=(1 plus or minus 7)/2 or x=4,-3.
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Answered by Tomas M. • Maths tutor
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Find the nth term in the series: 3, 7, 11, 15, 19

Find the difference between each value. 7-3, 11-7 ... For this series the difference is 4. The nth term is then 4n + or - a constant. The series is 3, 7, 11.. each of these is 1 below a multiple of 4. 4 1- 1...
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Answered by Hermione W. • Maths tutor
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When I plan for practice questions, I find it hard to apply the plans to questions in the real exam because they're not exactly the same. How can I help this?

Rather than planning for different exam-style questions, focus on planning for a topic . A topic can be defined as either a theme, character or plot-thread that is easily identifiable. For example, in Romeo ...
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How to find the gradient of a line?

The gradient, m, is the change in the y coordinates over the change in the x coordinates. M=(y 2 - y 1 ) / ( x 2 - x 1 )
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Answered by Hermione W. • Maths tutor
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