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Solve the simultaneous equations 3x+2y=13 and 4x+y=14

Multiply the second equation by 2 so that the coefficients of y are equal.(4x+y=14) x2 = (8x+2y=28)Now subtract the first equation from 8x+2y=28.(8x+2y=28) - (3x+2y=13)and you get 5x=15.Divide both sides by ...
NB
Answered by Natalie B. • Maths tutor
7209 Views

A ladder (length 314 cm) is leaning up against a wall. The length between the ladder and the wall is 1.54 m. At what angle is the ladder leaning up against the wall? Round your answer to 2 d.p.

In situations like this I would always find it best to draw a diagram with all the information we know labelled on it. Firstly, however, notice that our measurements are in different units. You can convert t...
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Answered by Gemma W. • Maths tutor
3838 Views

How is the perfect tense formed in German?

To form the perfect tense in German you use an auxiliary verb, either 'haben' or 'sein', plus the past participle of the main verb in the sentence. Most verbs take 'haben' when used in the perfect tense, but...
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Answered by Toby P. • German tutor
2586 Views

How do you form the imperfect subjuctive?

You take the present active infinitive of the verb, which is the part of the verb that means "to do something" and you add on the endings -m, -s, -t, mus, -tis, -nt. For example, the first person o...
MD
Answered by Mia D. • Latin tutor
2131 Views

Why do different metals burn with different colors?

This is because when the metals are heated (burned), their electrons can briefly 'jump' from lower energy electron shells to higher energy electron shells. This requires energy to happen, and light is not re...
FL
Answered by Frank L. • Chemistry tutor
10060 Views