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Solve the following simultaneous equations: x^2 + 2y = 9, and y = x + 3.

Label the two equations as the following: x 2 + 2y = 9 y = x + 3 Equation 2 can be substituted into equation 1, giving: x 2 + 2( x + 3 ) = 9Expanding the brackets and subtracting 9 from both sides means equa...
XB
Answered by Ximena B. • Maths tutor
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How do I solve simultaneous equations by substitution?

You can solve simultaneous equations by either substitution or elimination. Say we have the equations:(1) 8y + 6x = 24 and (2) 2y - x = 6SUBSTITUTION METHODFirst, you need to find x in terms of y (or y in te...
JN
Answered by Joshua N. • Maths tutor
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Describe the role of bile in the digestive system

Bile is made in the liver and stored in the gall bladder. Bile emulsifies fatty acids and lipids, breaking large chains into smaller droplets. This increases the surface area for enzymes (lipase) to act on, ...
BP
Answered by Bella P. • Biology tutor
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In ‘To a Daughter Leaving Home’, how does the poet present the speaker’s feelings about her daughter? (24 marks, unseen poetry section C)

When approaching the unseen poetry task, it's important to write a clear, structured essay with relevant information about the authorial methods used. The student shouldn't panic about not being familiar wit...
AM
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A block of mass 5kg is placed on the end of a meter rule on the end of a table. Calculate the moment that is produced by the block.

1. Moment=Force x Distance 2. Convert mass into weight (x9.81) 3. Times the weight by the distance from the pivot point. 4. If done correctly the answer should be 49.06NKg (Don't forget units).
CB
Answered by Cameron B. • Physics tutor
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