Answer:
B. 4/3 hours
Step-by-step explanation:
because in smart
To solve this problem you must apply the proccedure shown below:
1. Let's call 
to the number of equipment operators and 
to the numbers of laborers.
2. Based on the information given in the problem above, you can make a system of equation, as following:
3. By applying the method of substitution, you can solve for from the second equation and substitute it into the first equation to solve for , as following:
4. Now, substitute the value of into the second equation to calculate :
The answer is: 19 equipment operators and 13 laborers.
The answers per item are shown below:
1. Solving for x, we use Laws of Sines such as
38/sinX=22/sin35°
sinX=(38/22)*sin35
X=82.19°
The answer for item 1 is x equal to 82.19°.
2. Solving for d, we still apply Laws of Sines such as
d/sin70°=42/sin41°
d=42sin70°/sin41°
d=60.16 ft.
The answer for item 2 is d equal to 60.16 feet.
What is the equivalent value of 1/3×(−15)
Answer: -5x
