15,254 Answered Questions for the topic precalculus

Precalculus

11/24/23

Find an equation for a Parabola

Find an equation for the parabola that has its vertex at the origin and directrix x=−10. If your answer is in the form x^2=Ay, then input here: A= 40y??if your answer is in the form y^2=Ax, then... more
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11/24/23

Semicircle attached to 3 triangles SAT Problem
Angle  of  is a right angle. The sides of  are the diameters of semicircles as shown. The area of the semicircle on equals , and the arc of the semicircle on  has length . What is the radius of the... more
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Precalculus

11/23/23

precalc question

254-x = 1253x+1
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Precalculus

11/23/23

how do you write a logarithm as the sum or difference of logarithms.
example 1: ln(e3x2/3√y)example 2: log (100/(x2-y2)5
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Precalculus

11/23/23

how do you solve an equation using Q(t)=Qoe^kt

The half-life of a radioactive substance is 8.93 years. If 6 grams of the substance is present now, how much will be present in 15 years?
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Precalculus

11/23/23

Exponential and Logarithmic Models
The count in a bacteria culture was 800 after 10 minutes and 1100 after 40 minutes. Assuming the count grows exponentially,What was the initial size of the culture?   Find the doubling... more
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Precalculus

11/21/23

A triangular parcel of ground has sides of length 710 feet, 675 feet, and 535 feet. Find the measure of the largest angle.
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Precalculus

11/20/23

A rectangle is inscribed in the region bounded by the x-axis, the y-axis, and the graph of x+2y-8=0 as shown in the figure.
Numerical, Graphical, and Analytical Analysis - Arectangle is inscribed in the region bounded by the x-axis,the y-axis, and the graph of x+2y-8=0 as shown inthe figure.A) Write the area A of the... more
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Precalculus

11/19/23

Use the given conditions to find the exact values of sin(2u), cos(2u), and tan(2u) using the double-angle formulas.

sec(u) = −2, 𝜋/2 < u < 𝜋sin(2u)cos(2u)tan(2u)
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Precalculus

11/19/23

Use the given conditions to find the exact values of sin(2u), cos(2u), and tan(2u) using the double-angle formulas.
sin(u) = −3/5,    3𝜋/2 < u < 2𝜋sin(2u)cos(2u)tan(2u)
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Precalculus

11/19/23

Solve the equation. (Find all solutions of the equation in the interval [0, 2𝜋). Enter your answers as a comma-separated list.)
4 tan(2x) − 4 cot(x) = 0
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Precalculus

11/19/23

Use a double-angle formula to rewrite the expression.
1/2 cos^2 x -1/4
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Precalculus

11/17/23

Is there a difference in dilating lines when dilating polygon line equations versus dilating tangent lines to y=f(x) functions?
Is there a difference in dilating lines when dilating polygon line equations versus dilating tangent line equations to y=f(x) functions?If so then the dilation type for line y=mx+b needs to be... more
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Precalculus

11/17/23

Circle (x-3)^2+(y-2)^2=4. At(4,2-3^½) , tangent line equation is? Let y’=y-2. Dilating y’ by 2 have ellipse. Equation of tangent line at(4,2-2(3^½))is?Original tangent line dilated by 2 from (3,2) is?
Have circle (x-3)2+(y-2)2=4.At point (4,2-√3) tangent lineis y=(√3)x/3+2-7(√3)/3. Let y’=y-2. x’=x-3. Dilating y’ by 2 and x’ by 1have ellipse. What is equation of tangent line dilated by 2 from... more
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Precalculus

11/16/23

Can someone please explain solving for the exact angle using the sum or difference formula
In my Pre-Calc, class we are solving for the exact angle using the sum or difference formula, I understand how to apply the formula, I just don't know how to get the "expanded" version of the... more
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Precalculus Math

11/16/23

The famous economist Milton Friedman
The famous economist Milton Friedman proposed the theory that individuals base their consumption (buying goods and services) on their expected long-term disposable income, their "permanent... more
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Precalculus Math

11/15/23

What is the magnitude (to the nearest kilogram) and the direction angle (to the nearest tenth of a degree) of the resulting force?
The magnitude and direction exerted by two tugboats towing a ship are 1800 kilograms, S82°E, and 1500 kilograms, N78°E, respectively. Find the magnitude, to the nearest kilogram, and the direction... more
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Precalculus Math

11/15/23

The table below contains the values of the function.
The table below contains the values of the function y=f(x).x | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |f(x) 0 | 0.5 | 2 | 4.5 | 8 | 12.5 | 18 | 24.5 |Each function in parts (a)-(c) is a... more
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Precalculus Math Science Biology

11/15/23

Resistor and Capacitor Arrangements
Three capacitors are connected as shown in the figure. What is the equivalent capacitance between points A and B? Please explain the steps leading to your answer.If you were to swap all capacitors... more
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Precalculus

11/15/23

I have to pay a tutor for a session that wasn't scheduled but that we missed.
A tutor committed to a session and we missed it. It was not scheduled but I feel it is very important that the tutor get paid for this session. How do I pay this tutor?
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Precalculus

11/14/23

What property does this indicate?
((√a7)-b^5)((√a7)+b^5)=a7-b10
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Precalculus

11/14/23

Solve the equation. (Enter your answers as a comma-separated list. Use n as an integer constant. Enter your response in radians.)
csc2(x) + 8 csc(x) − 9 = 0
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Precalculus

11/14/23

Solve the equation. (Enter your answers as a comma-separated list. Use n as an integer constant. Enter your response in radians.)
sec2(x) − 4 tan(x) = −2
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Precalculus

11/14/23

Solve the equation. (Enter your answers as a comma-separated list. Use n as an integer constant. Enter your response in radians.)
tan2(x) + tan(x) − 6 = 0
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Precalculus

11/13/23

Exponential Growth/Decay
A bottle of seltzer water initially has a temperature of 79°F. It is left to cool in a refrigerator that has atemperature of 38°F. After 10 minutes the temperature of the seltzer water is 66°F.... more
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