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In order to answer this question you need to find out how much cement, sand and gravel is needed to make 180kg of concrete mix. To do this you must find out how many parts the concrete mix ratio is made u...
My exact explanation would depend on the students level of understanding. The following answer assumes a basic understanding of differentiation and equations of lines; a) Gradient of tangent is equal to g...
This question asks how students can formulate linear equations from worded questions.
The first step is to give each person an algabraic symbol. j for John, s for Sandra and k for Kathy works fine...
To differentiate xx, we first let y = xx. (Note that xx is not in the form xc w...
The main piece of information this question gives us is that the two lines do not cross or touch. From this we can immediately see that we will need to use the discriminant of the quadratic formula b...
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