exam Maths Puzzle Numerical Ability

Find the area of ∆ABC, if A is 55 degrees, b=8 meters, and c=14 meters.

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exam Other Question

Question: solve each of the following systems by using either addition or substitution. If a unique solution does not exist, state wheter the system is dependent or inconsistant. The problem is
10x+2y=7
y=5x+3
Can someone help to solve this? 8x-(4x-9)=73 & 8x=23+3(2x-5) & 2(x-3)-17=13-3(x+2) & (x+4)(x+1)=x^2+59 < for this problem it say to use foil to get rid of the quadratic(x^2) terms). and the last one is x(x+1)=(