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Let f(x) = 2x^3 + x^2 - 5x + c. Given that f(1) = 0 find the values of c.

In order to solve this question we simply must substitute x=1 into f(x). But what is f(x)? What does it actually mean to make a subsitution? f(x) has a fancy name attached to it called a function . It is ess...
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Answered by Michael L. • Maths tutor
10794 Views

What happens to reactivity as you go down group 1 in the periodic table?

As you go down the group, what changes? The number of shells. As you go down the group, what doesn't change? The number of electrons in the outer shell - it is always one. For group 1, they become reactive w...
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Answered by Divya V. • Chemistry tutor
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Solve the simultaneous equations: ...

Two methods for simultaneous equations: making them equal to each or substitution. If they both have a common term, for example "y", then you can do substitution, otheriwise find a way to make them...
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Answered by Divya V. • Maths tutor
3792 Views

Why do humans have a double circulatory system?

Ask the student: what other option is there? What are the differences between the two? Answer: Humans have a small surface area to volume ratio, so diffusion alone is not enough to meet the high metabolic de...
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Answered by Divya V. • Biology tutor
9546 Views

Identify and explain the tense used for each verb in the following sentence: Il se dépêche pour éviter d'arriver en retard.

There are three verbs in this sentence: se dépêcher, éviter and arriver. Se dépêcher is conjugated using the present simple tense because the action is currently happening. Eviter et arriver are both in the ...
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Answered by Amélie S. • French tutor
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