Answer:
Step-by-step explanation:
Let be the equation of the circle. We know that must be iqual , due to the canonical equation of the circle is , but we can think as an unknown for the moment.
In order to determine the equation of the circle we have to find the coefficients . In addition, we have that are point on this circle. Furthermore, If is any point in circle, then the following equations are satisfied:
Here the unknowns are . According with a result of linear algebra, the system has a nontrivial solution if and only if the determinant of the matrix of coefficients is zero, then we have that
Calculating this determinant we obtain the equation:
Simplifying:
Answer:
Our equation is:
Solving this yields that the width of the river is about 77 feet.
Step-by-step explanation:
Part A)
We know that McNeal is 120 feet from the tree. This is the hypotenuse.
And we want to find the width of the river, which is the side opposite from our angle.
Since we want to find the side opposite to our angle and we are given the hypotenuse, we will use the sine ratio:
Our angle is 40°.
The opposite side is unknown. We can let this be <em>w</em> to represent width.
The hypotenuse is 120 feet. Hence, our equation is:
Part B)
Solve for <em>w: </em>
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Use a calculator:
The width of the river is about 77 feet.
Answer:
<h3>B.6 is the correct answer </h3>
Step-by-step explanation:
<h3>I hope it helps ❤❤❤❤</h3>
She was supposed to add the hours(38.5) and multiply the amount of money she earned(7.50) resulting in $288.75
Correct me if I'm wrong and if it is I'm truly sorry