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How do I solve these two equations simultaneously: 7x+y=1 and 2x^2 - y = 3

These types of questions can sometimes throw people off due to the quadratic nature of the second equation but don't fret; we'll use a method called substitution to find the answer! Firstly, we rearrange the...
ZS
Answered by Zacchaeus S. Maths tutor
3416 Views

Explain how the use of antibiotics might lead to a resistant strain of bacteria arising.

-Antibiotics kill individual bacterial cells. Random mutation of the DNA in a bacterial cell might confer antibiotic resistance to that bacterial cell. A cell with the resistance mutation is less likely to b...
MP
Answered by Mark P. Biology tutor
3085 Views

Describe the key features of advertising in the USA in the 1920s?

One important feature of advertising in 1920s America was that it infiltrated all aspects of people’s lives. Visual forms of advertising could be seen on billboards and in magazines, newspapers, shop windows...
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Answered by Laura H. History tutor
48365 Views

Describe how water is carried by the transpiration stream. (3 marks)

Transpiration is the loss of water from a plant by evaporation, which then diffuses out of the leaf via the stomata. It is important to note whether the student understands how and why water leaves the plant...
AS
Answered by Abishek S. Biology tutor
24553 Views

Find the nth term of the sequence 3,7,11,15...

We are searching for a rule that when we put in n (n represetning where the term is in the sequence eg. 3 is the first term so n will be 1) our output is the sequence above. This rule will most likely be in ...
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Answered by Joanna S. Maths tutor
35509 Views