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Solve the following simultaneous equations to obtain values for x and y: 2x + y = 7 & 3x - y = 8.

Label your equations 1 and 2 respectively. Make y the subject of equation 2 by taking away 3x from both sides and multiplying both sides by -1, to get y = 3x - 8. Now substitute this into equation 1 (i.e. re...
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Answered by Pratham M. • Maths tutor
4067 Views

How do you calculate the sine, cosine and tangent values for 45 degrees without a calculator?

To find the values for 45 degrees, we construct a right angled isosceles triangle, which has two sides of equal length. We can say that these sides are 1 unit long, and so we can figure out the value of the ...
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Answered by Heather C. • Maths tutor
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I decrease a number by 26%, the answer is 9 x10^-7, what was the original number?

The number has been decreased by 26%, this means that the original number is 100-26=74% of the original value. Therefore 9 x 10 -7 = 0.74 x N, where N is the original number. Hence N=(9 x 10 -7 )/0.74 = 1.21...
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Answered by Luke C. • Maths tutor
4640 Views

Cosa ti piacerebbe fare la prossima estate?

Mi piacerebbe molto andare in Francia. Non ci sono mai stato, e vorrei vedere in particolare Parigi. Mi hanno detto che i dolci sono buoni.
CM
Answered by Chiara M. • Italian tutor
3069 Views

What is the difference between the different demonstrative pronouns?

First of all, we need to define what a demonstrative pronoun is. A demonstrative pronoun takes the place of a noun in a sentence. When discussing demonstrative pronouns in Spanish, proximity (how close we ar...
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Answered by Hari P. • Spanish tutor
2857 Views