To find the height of the lighthouse, use
to get that h = 14 (the tangent of 45 is 1). Now for the next question, you have to use the height you just solved for to find angle y. Use
and the inverse tangent button on your calculator tells us that the angle is 28.3. Now for the last question, use the supplement of 45 to get that the angle adjacent to y is 135. 180 - 135 - 28.3 = 16.7 That's your x value.
BC <span>≅ EF (CPCTC)
Set the two side lengths equal to each other.
38.4 = 5x - 10.6
Isolate the x. Add 10.6 to both sides
38.4 (+10.6) = 5x - 10.6 (+10.6)
5x = 49
Isolate the x, divide 5 from both sides
5x/5 = 49/5
x = 49/5
x = 9.8
9.8 should be your answer
hope this helps</span>
Your answer is: 2x^6-x^4+5x^3+2x^2+1\x^2
-6 + 5x = 6x - 7 Subtract 5x from both sides
-6 = x - 7 Add 7 to both sides
1 = x Switch the sides to make it easier to read
x = 1
You have a 33.33% chance to get it right each time
multiply 33.33%*33.33%*33.33%= .3333*.3333*.3333
it equals about 4%
