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Expand and simplify (x+5)(x+7)

Front - Outer -Inner -Last (FOIL) x X x = x^2x X 7 = 7x 5 X x = 5x5 X 7 = 35 7x + 5x = 12x x^2 + 12x + 35
EM
Answered by Ellie M. • Maths tutor
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Explain how a leaf is adapted for photosynethesis

A large surface area for gaseous exchangea waxy cuticle prevents water lossthe spongy mesophyll layer has air spaces which allow for efficient gasious exchange Stomata allow gases to enter and exit the leafg...
EM
Answered by Ellie M. • Biology tutor
3203 Views

Solve simultaneous equations: 3x + y = 12 and 5x + 5y = 30

Make y the subject of equation 1 by subtracting 3x from both sidesy = 12 - 3x Substitute 12 - 3x for y in equation 25x + 5(12 - 3x) = 305x + 5 12 - 5 3x = 305x + 60 -15x = 3060 - 10x = 30 # add 5x and -15x S...
TD
Answered by Tutor162883 D. • Maths tutor
4278 Views

Describe what happens when 2 atoms of Potassium react with one atom of Sulphur

Potassium has 1 electron in its outer shell whilst Sulphur has 6 electrons in its outer shell, this can be deduced from the periodic table as Potassium is in group 1 and Sulphur group 6. When the two react t...
AH
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Write about an artist who used the theory of colors in his work. And so some experiments in media based on his ideas.

Write a few paragraphs about an artist such as Josef Alberse. Describe one of his color theories. Use Acrilics and/or colour pencils to reproduce some of his colour experiments. Finally combine all the work ...
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Answered by Polina N. • Art tutor
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