2,195 Answered Questions for the topic Pre Calculus
11/25/19
Precalculus Vector problem
An airplane is heading due north at 260 mph (air speed). a 16 mph window blows from the northwest at an angle of 110 degrees clockwise from the north.Find the true speed (ground speed ) and...
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Pre Calculus
11/25/19
The length of a rectangle is four times it’s width.If the perimeter of the rectangle is 70 in , find it’s area
11/24/19
Precalc question
For this problem, y = f(x) = 2x^2 − 3x − 1 on the domain of all real numbers.Explain why y = f(x) does not have an inverse function on the domain of all real numbers.
Pre Calculus
11/23/19
what (in slope form) is the equation for a tangent line where y=2X^2 with the point (1,2)
11/22/19
A survey team is trying....
) A survey team is trying to estimate the height of a mountain above a level plain. From one point on the plain, they observe that the angle of elevation to the top of the mountain is 24degrees ....
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11/22/19
Recall the definition: Let θ be an angle in standard position. Its reference angle is the acute angle θ′ formed by the terminal side of θ and the horizontal axis.
Below, express in the same units (degrees or radians) as theta. You can enter arithmetic expressions like 210-180 or 3.5-pi.
The reference angle of 100 deg is _____
the reference angle of 350...
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11/22/19
A line drawn from the origin and forming the angle t with the x-axis intersects the unit circle at the point (√5/3, -2/3). complete the following equations
cos t= sin t=tan t=
11/22/19
Evaluate the following expressions. The answer must be given as a fraction, NO DECIMALS. If the answer involves a square root It should be entered as sqrt.
If sin theta = 3/5 and theta is in quadrant II, then....
cos theta=
tan theta =
cot theta =
sec theta =
csc theta=
11/22/19
A line drawn from the origin and forming the angle t with the x-axis intersects the unit circle at the point (1/3, (2√2)/3). complete the following equations
cos t= _____sin t=_____tan t= ______
Pre Calculus
11/22/19
Find polynomial function with a degree of 3, P(2)=5 and the given zeros of -3,-1 and 4
Pre Calculus
11/22/19
revenue of r as a function
find a model that expresses the revenue r as a function of x (remember R=xp) p=-1/7x +200
11/21/19
Rolle's Theorem
Verify that the function satisfies the three hypotheses of Rolle's Theorem on the given interval. Then find all numbers c that satisfy the conclusion of Rolle's Theorem. (Enter your answers as a...
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Pre Calculus Precalculus
11/20/19
A rectangular lot whose perimeter is 360 feet is fenced along three sides. An expensive fencing along the lot's length costs $25 per foot
, and an inexpensive fencing along the two side widths costs only $6 per foot. The total cost of the fencing along the three sides comes to $3590. What are the lot's dimensions?
11/19/19
Precalc Question
Rocky is a horse and he is searching his master on his ranch. His master is not moving, just sitting on a rock and whistling. The whistle can be heard from up to 1 mile away. Initially, Rocky is at...
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11/19/19
Precalculus Question
For the following function, y = f(x), simplify the following expression so that h is no longer a factor in the denominator, then calculate the result of setting h = 0 in this simplified expression:...
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11/17/19
Precalc question
A car leaves Seattle heading east. The speed of the car in mph after m minutes is given by the function C(m) = 70m^2 / (10 + m^2) .(a) Find a function m = f(s) that converts seconds s into minutes...
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11/15/19
Precalc question
A car leaves Seattle heading east. The speed of the car in mph after m minutes is given by the function C(m) = 70m2 10 + m2 .(a) Find a function m = f(s) that converts seconds s into minutes m....
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11/15/19
Precalc question
(a) Let f(x) be a linear function, f(x) = ax + b for constants a and b. Show that f(f(x)) is a linear function.(b) Find a function g(x) such that g(g(x)) = 6x − 8.
11/15/19
Precalc Question
Let f(x) = 1 2 x + 3.Give a quadratic function whose fixed points are x = −2 and x = 3.
11/15/19
Precalc Question
Let y = f(z) = √ 4 − z 2 and z = g(x) = 2x + 3. Compute the composition y = f(g(x)). Find the largest possible domain of x-values so that the composition y = f(g(x)) is defined.
11/14/19
Precalc Question
Suppose you have a function y = f(x) such that the domain of f(x) is 1 ≤ x ≤ 6 and the range of f(x) is −3 ≤ y ≤ 5.(a) What is the domain of f(2(x − 3)) ?(b) What is the range of f(2(x − 3)) ?(c)...
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