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Solve the simultaneous equations 'x-2y=3' and 'x^2+2y^2=27'

Equation 1: x-2y=3Equation 2: x 2 +2y 2 =27The easiest way to do this is to put one of these equations into the other, by rearranging for either x or y. Because there are no squares to deal with in equation ...
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Answered by Tahmid K. • Maths tutor
8006 Views

What is the difference between Ser and Estar?

When contemplating whether to use Ser or Estar, I find the best expression to help you remember is 'for how you feel and where you are always use Estar'!Despite both verbs meaning 'to be', ser is used when y...
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Answered by Georgia S. • Spanish tutor
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When should you use the present subjunctive tense

There are many different uses for the subjunctive tense or 'congiuntivo' however it is most commonly used when the speaker or writer is expressing uncertainty or doubt instead of a fact. The subjunctive ofte...
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Answered by Georgia S. • Italian tutor
2436 Views

Name the first stage of mitosis, and describe what happens at this stage

The first stage of mitosis is ProphaseAt prophase...The already duplicated DNA within the nucleus condenses (coils up) to form sister chromatids, connected by a centromereThe nucleolus and nuclear envelope b...
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Answered by Lara Q. • Biology tutor
3154 Views

Evaluate the integral between 5 and 3 for xe^x

Firstly, by looking at the integral, we see that this will have to be done by parts. There are 2 parts of this expression, the ' x ' and the ' e^x' . As we know the formula for integration by parts is: integ...
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Answered by Ishaan O. • Maths tutor
3817 Views