Firstly, foil 1/2(3 - x):
Next, combine like terms:
Next, subtract 4.5 on both sides of the equation:
Next, divide both sides by -0.5, and since you are dividing by a <u>negative</u>, flip the sign as well and <u>your answer will be </u>
Answer:
220
Step-by-step explanation:
Divide the numbers
<em>I think your answer is fine</em>
In order to find the length of ?? (let's call this distance x), let's first find the value of Angle A.
The cosin of Angle A is Adjacent / Hypotenuse, or 40 / 50. Using this Info:
cos (A) = 40/50
cos (A) = .8
With this crucial piece of info, we can find the Total length of A-D (Point D being the point above C), by finding its relation to side AC (length of 50 + 70 =120 ft)
Cos (A) = adjacent / hypotenuse
Cos (A) = AD / (120) We know that cos (A) = .8
.8 = AD / (120) Multiply both sides by 120
96 = AD
We're almost there! Remember that we're trying the find x (?? in the diagram).
x + 40 = 96
x = 56 ft
Answer: C 41 degrees
Step-by-step explanation: