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Find roots 'a' and 'b' of the quadratic equation 2(x^2) + 6x + 7 = 0

We know to find roots of any quadratic equation we use the quadratic formula, [-b +- (b^2 - 4ac)^(1/2)]/2a where a=2, b=6, and c=7. Plug these values in and we obtain, [-6 +- (-20)^(1/2)]/4. [Remember for im...
SN
3655 Views

What can I do to improve my Italian reading skills in order to pass my exam with flying colours?

In order to improve your Italian reading skills, you must improve your comprehension skills first, which means that you have to know how to find in a written text the information that will help you to answer...
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Answered by Claudia G. • Italian tutor
2748 Views

0.120g of an ideal gas was introduced into a gas syringe. The volume occupied by the gas at a pressure of 1.02x10^5 Pa and temperature 20 degrees was 49.3 cm^3. Calculate the molar mass of the gas.

The ideal gas law is PV=nRT, and we know that we can achieve the molar mass through the relationship of; n=m/mr. When using the ideal gas law it is essential that we use SI units before we begin plugging in ...
RS
Answered by Robbie S. • Chemistry tutor
3707 Views

How is the passive used in Spanish?

The passive is used more often in English than in Spanish. In Spanish active sentences are preferred in most cases. For example: She was bitten by the dog is most naturally expressed in Spanish as El perro l...
DM
Answered by Daniel M. • Spanish tutor
2771 Views

How can I recognise the subjunctive?

It can be tricky to know how to recognise the subjunctive tense, particularly since it is rarely used in English! Rather than referring to the subjunctive as a "tense" it is better to understand it...
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Answered by Beatrice H. • Spanish tutor
2736 Views