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Given 6x+2y=4 and 5x+y=8, solve the simultaneous equations to find x and y.

The key here is to eliminate one of the variables; it doesn't matter whether we start by trying to get rid of x or y we will arrive at the same solution. For us to eliminate either x or y it is easiest to...

Answered by Rebecca M. • Maths tutor

8332 Views

What are the advantages provided to plant cells by having a cell wall?

Cell walls provide plant cells with protection and structure. Protection may be from adverse conditions or from biotic threats like fungi or bacteria. The structure of the plant is dependent on the pre...

Answered by Peter O. • Biology tutor

7993 Views

When do you use 'sein' and when do you use 'haben' in the past tense?

When forming a sentence in the past, or perfect tense in German, it is always formed with a conjugation of 'sein' or 'haben', plus the past participle of the main verb. It is much more common to use th...

Answered by Alana H. • German tutor

5406 Views

How do I analyse sources?

Sources play a vital role in the study of History. It is important to know how to engage with the sources correctly and use them appropriately in an answer. The three main things to remember are:

Answered by Liliane B. • History tutor

3931 Views

How does the gender of German nouns work?

In German there are three genders that a noun could have: masculine, feminine, and neuter. If you have studied French or Spanish for example, you will have seen nouns that have masculin or feminine gen...

Answered by Alana H. • German tutor

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