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You are given a right triangle ABC with angle ABC = 30 degrees and AB equal 7. Then AC and BC are then extended to points D and E so that EDC is a right triangle. Find length DE if BD = 15

First BC needs to be found. That is done by dividing AB by cosin ABC. Then CD is found by subtracting form BD. After that the angle ACB is 90-ABC (because ABC is right triangle). Then because AE and BD in...

Answered by Andrey E. • Maths tutor

4259 Views

Why does profit maximisation occur where MR=MC?

When MR>MCThe change in total revenue as a result of increasing output by one additional unit is greater than the change in total costs.Profit can still be made so firms increase output until MR = MC a...

Answered by Georgina M. • Economics tutor

4427 Views

How does the writer use langauge to create suspense in Heroes?

Rober Cormier uses language to create suspense in Heroes through the first person narrative of the main character. For example 'at that moment, I knew that I was really annonymous, that I wasn't Francis J...

Answered by Imogen R. • English Language tutor

2980 Views

expand and simplify: 5(3a+6b)+ 3(7b+a)

first we expand the equation:(53a +56b) + (37b+3a)now we multiply15a+30b +21b+3anow simplify18a+51b

Answered by Muzaina R. • Maths tutor

1541 Views

why do ionic compounds conduct electricity when in molten state or solution but not when solid?

this is because ionic compounds have positive and negative ions that are only allowed to move when the compound is liquid or when dissolved in solution. in solid state they are in their fixed position and...

Answered by Muzaina R. • Chemistry tutor

8818 Views