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Precalculus Homework

04/06/17

What are the possible values of the angle θ if (cos(θ))^2=1/2 and sin(θ)=-sqrt2/2 (Only the numerator is under the square root)

The values of θ are in radians and are between 0 and 2π . Enter your answer in exact form. I needed to enter in a smaller value and a larger value. However, I got the answers of pi/4 and 3pi/4... more

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Precalculus Homework

04/04/17

Determine the set of values of x where the function y=cos(x) is increasing where −2π < x < 2π.

(Do not include the endpoints of the intervals, and all intervals should be open intervals on all endpoints) I don't really understand the instructions here. This is one of a few extra credit... more

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Precalculus Homework

04/04/17

An arc on a circle subtends a central angle of "theta"=1/2pi radians, and the area of the sector is 98 cm^2.

(Determine the radius, r centimeters, of the circle. Write an exact number as an integer, fraction, or decimal.) I'm very confused about arcs and angles and whatnot. I'm doing extra credit, but... more

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Precalculus Homework Angular Velocity Linear Velocity

03/31/17

one gear wheel turns another

One gear wheel turns another the teeth being on the rims. The wheels have 40cm and 50cm radii, and the smaller wheel rotates at 20rpm. find angular speed of larger wheel in radians per second

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Precalculus Homework

03/18/17

Pre Calc: Identities

Find all solutions to the equation on [0,2π)sinxcotx^2-sinxcsc^2 x=1/2

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Precalculus Homework Math Word Problem Trignometry

03/11/17

A bike wheel has a circumference of 113 inches and travels 791 inches on a road.

How many times did the wheel rotat? How many radians did it turn? ps. I need to know how to get the answer, thx!

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Precalculus Homework

03/10/17

Decay rate,k is 2.7% per year=-0.027. What is the half-life in years

i need help understanding word problems in precalculus algebra.

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Precalculus Homework

03/03/17

A farmer finds that if she plants 75 trees per acre, each tree will yield 20 brushels of fruit.

A farmer finds that if she plants 75 trees per acre, each tree will yield 20 bushels of fruit. She estimates that for each additional tree planted per acre, the yield of each tree will decrease by... more

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Precalculus Homework Precalculus Tangent Cosine

02/27/17

complete the identity: cot(t) + tan(t)=

I'm having trouble solving the above question, as well as the one below tan20+tan10/1-tan20tan10=

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Precalculus Homework

02/22/17

cscx/cotx+tanx=cosx

how do i establish identity

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Precalculus Homework

02/17/17

A parabola has a vertex at (2,4). The y-coordinate of the parabola at x=3 is 18/6 . Determine the x-intercepts of the parabola. Enter your answer in exact form

I need to find what the smaller and larger x intercepts are, but I'm not sure how to do that (and it's a homework question with a topic that hasn't yet been covered in class) From what I've been... more

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Precalculus Homework

02/17/17

Farmer Brown has 300 yards of fencing with which to build a rectangular corral. He wants to divide it evenly into three pens, so he adds in two divider fences.

a) Write the area of the corral as function of x, so A(x)=? b) Determine the maximum area enclosed by the corral. (Decimal approximations are marked incorrect.) So the maximum area equals how many... more

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Precalculus Homework

02/17/17

Alice invests $8000 at Bob's bank. Bob compounds interest quarterly at a nominal rate of 6%. How much is Alice's investment worth after 7 years?

For this problem, I used the formula of A=P(1+r/n)nt to get to A=8000(1+0.06/4)4*7, which would give the answer of $12,137.77. Is this answer correct and, if not, how would I arrive at the answer?... more

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Precalculus Homework

02/17/17

Alice invests $8000 at Bob's bank. Bob compounds interest quarterly at a nominal rate of 6%. How much is Alice's investment worth after 7 years?

For this problem, I used the formula of A=P(1+r/n)nt to get to A=8000(1+0.06/4)4*7, which would give the answer of $12,137.77. Is this answer correct and, if not, how would I arrive at the answer?... more

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Precalculus Homework

02/17/17

Determine the domain of the function? f(x) = sqrt(−x2+13x−40)

I tried solving this one (I'm trying to only ask questions on here that i've tried solving lol), however, I keep getting the domain of (-infinity, infinity). However, my teacher said that that... more

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Precalculus Homework

02/17/17

Farmer Brown has 300 yards of fencing with which to build a rectangular corral. He wants to divide it evenly into three pens, so he adds in two divider fences.

a) Write the area of the corral as function of x, so A(x)=? b) Determine the maximum area enclosed by the corral. (Decimal approximations are marked incorrect.) So the maximum area equals how... more

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Answers •1

Precalculus Homework

02/17/17

Determine the inverse function of f ○ g(x). f (x) = 2 x + 9 and g (x) = −9 x + 8

The inverse in this question is a function of y. What would "(f ○ g)−1(y) =" equal. I got the answer (-x+25)/18 (or 25/18-x/18). However, this answer is wrong. Should I just sub out the x to a y so... more

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Precalculus Homework

02/17/17

The function f(x) = 7x^2 − 4x + 9 is not invertible, however, the domain can be restricted so that the function is invertible only on the restricted domain.

There are many ways to do this. One way is to only use the set of positive, real numbers of the form [a,∞). Determine a value of a so that it is the smallest possible, positive real number where... more

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Precalculus Homework

02/17/17

A parabola has a vertex at (2,4). The y-coordinate of the parabola at x=3 is 18/6 . Determine the x-intercepts of the parabola. Enter your answer in exact form

I need to find what the smaller and larger x intercepts are, but I'm not sure how to do that (and it's a homework question with a topic that hasn't yet been covered in class)

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Precalculus Homework Precalculus Pre Calculus Precal

02/14/17

PRECALCULUS HELP: inverse of a equation

The functionf(x) = −12 x^2 + 6x + 5is not invertible, however the domain can be restricted so that the function is invertible only on the restricted domain. There are many ways to do this. One way... more

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Precalculus Homework Precalculus Precalc

02/14/17

IMMEDIATE HELP NEEDED: f(x) = −12 x^2 + 6x + 5Using your value of a determine the domain for which f(x) is invertible. Provide your answer in interval notation.

The functionf(x) = −12 x^2 + 6x + 5is not invertible, however the domain can be restricted so that the function is invertible only on the restricted domain. There are many ways to do this. One way... more

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Precalculus Homework Calculus Precalculus Algebra

01/30/17

a person on the top of a 160-foot building throws a baseball vertically upward. The quadratic function, s(t)= -16t^2 +64t +160.

a person standing close to the edge on the top of a 160-foot building throws a baseball vertically upward. The quadratic function, s(t)= -16t^2 +64t +160, models the ball's height where s(t) is the... more

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Precalculus Homework Precalculus Immediate Help

01/30/17

Precalc Circle Help Please

The Mayor of Hotlanta is told that zombies are spreading out from the center of a field in the city. The Mayor quickly puts out a signal for Capt. Brave who hovers 40 meters over the center of the... more

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Precalculus Homework Lesson 1 1

01/11/17

F (x) = x/50

Describe the relevant domain of the function

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Precalculus Homework

01/11/17

I need help with finding the answer to a circle problem

Find the distance between Memphis (35 degrees 9 minutes north latitude) and New Orleans (29 degrees 57 minutes north latitude). Assume that the radius of the Earth is 3960 miles. This is for... more

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What are the possible values of the angle θ if (cos(θ))^2=1/2 and sin(θ)=-sqrt2/2 (Only the numerator is under the square root)

Determine the set of values of x where the function y=cos(x) is increasing where −2π < x < 2π.

An arc on a circle subtends a central angle of "theta"=1/2pi radians, and the area of the sector is 98 cm^2.

one gear wheel turns another

Pre Calc: Identities

A bike wheel has a circumference of 113 inches and travels 791 inches on a road.

Decay rate,k is 2.7% per year=-0.027. What is the half-life in years

A farmer finds that if she plants 75 trees per acre, each tree will yield 20 brushels of fruit.

complete the identity: cot(t) + tan(t)=

cscx/cotx+tanx=cosx

A parabola has a vertex at (2,4). The y-coordinate of the parabola at x=3 is 18/6 . Determine the x-intercepts of the parabola. Enter your answer in exact form

Farmer Brown has 300 yards of fencing with which to build a rectangular corral. He wants to divide it evenly into three pens, so he adds in two divider fences.

Alice invests $8000 at Bob's bank. Bob compounds interest quarterly at a nominal rate of 6%. How much is Alice's investment worth after 7 years?

Alice invests $8000 at Bob's bank. Bob compounds interest quarterly at a nominal rate of 6%. How much is Alice's investment worth after 7 years?

Determine the domain of the function? f(x) = sqrt(−x2+13x−40)

Farmer Brown has 300 yards of fencing with which to build a rectangular corral. He wants to divide it evenly into three pens, so he adds in two divider fences.

Determine the inverse function of f ○ g(x). f (x) = 2 x + 9 and g (x) = −9 x + 8

The function f(x) = 7x^2 − 4x + 9 is not invertible, however, the domain can be restricted so that the function is invertible only on the restricted domain.

A parabola has a vertex at (2,4). The y-coordinate of the parabola at x=3 is 18/6 . Determine the x-intercepts of the parabola. Enter your answer in exact form

PRECALCULUS HELP: inverse of a equation

IMMEDIATE HELP NEEDED: f(x) = −12 x^2 + 6x + 5Using your value of a determine the domain for which f(x) is invertible. Provide your answer in interval notation.

a person on the top of a 160-foot building throws a baseball vertically upward. The quadratic function, s(t)= -16t^2 +64t +160.

Precalc Circle Help Please

F (x) = x/50

I need help with finding the answer to a circle problem

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