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ABC and BCD are two attached triangles, attached along line BC. AB = 5.8cm, AC=5.2cm, BD=4.3cm. Angle BDC = 30 degrees, and angle DCB is a right angle. Calculate angle CBA.

This question teaches the importance of drawing diagrams to figure out what a question is asking, as well as deeply testing how well the student understands trigonometry and equation rearrangement, combining...
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Answered by Charles S. • Maths tutor
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What is the justified true belief account of knowledge and what is Gettier's challenge to it?

The justified true belief (JTB) account of knowledge purports to give the necessary and sufficient conditions for an subject's having knowledge. Precisely, the account states that a subject S knows a proposi...
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Answered by Henry S. • Philosophy tutor
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What does the Phillips curve show?

The Phillips curve shows the trade-off that must be made between inflation and unemployment . There is an inverse relationship between the two variables, with lower unemployment rates corresponding to higher...
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Answered by Zara N. • Economics tutor
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Explain why deflation may not always be a problem

Firstly, deflation can be defined as a persistent decrease in the general level of prices. An example would be Japan in the 1990's.There can be "good"deflation which occurs when Long Run Aggregate ...
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Answered by Samuel C. • Economics tutor
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Find the equation of the tangent to: y = X^2 + 3x + 2 at the point (2,12)

(1) Find the gradient using differentiation (2) If the gradient at (x 1 ,y 1 ) is m,y - y 1 = m(x - x 1 ) (1) We differentiate the given equation:dy/dx = 2x + 3 Then, find the gradient at (2,12). Sub x= 2 in...
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Answered by Samuel C. • Maths tutor
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