454 Answered Questions for the topic Precalculus Homework

Precalculus Homework

08/26/18

#### The length of a rectangle is 3 meters less than twice the width. If the area of the rectangle is 665 square meters, find the dimensions.

What is the length and what is the width

Precalculus Homework

08/25/18

#### Driving across a flat area.The angle of elevation to the peak is 4 degrees.13 miles closer to the mountain, the angle of elevation is 10 degrees. How tall?

Precalculus
How tall is the mountain?**

08/25/18

#### Find the equation in standard form of the circle with points (2,3), (3,4), (-1,2)

I can't keep up with the solution. I need it for my quiz on tuesday.

Precalculus Homework

08/08/18

#### Find the height of the pole

a tree sits on top of a tall building. An observer on the ground 17 m away from the building finds the angle of elevation to the base of the tree to be 30° And the angle of elevation to the top of...
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08/03/18

#### Can I get help on this question please?

Sarah serves at a restaurant and makes 20% of what she sells as tips. Her base salary is $10.20 an hour. Each hour she sells and average of $60 of food and drinks. She also makes time and a half...
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Precalculus Homework

07/27/18

#### A dietician works in a hospital and prepares meals under the guidance of a physician. Suppose that for a particular patient, a physician prescribes a meal to h

A dietician works in a hospital and prepares meals under the guidance of a physician. Suppose that for a particular patient, a physician prescribes a meal to have 950 calories, 65 g of protein, and...
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Precalculus Homework

07/22/18

#### Given sin x= -4/5 and x is in quadrant 3, what is the value of tan x/2?

I’ve been struggling with this for 20 min any help would be much appreciated!

06/28/18

#### Find a polynomial function of lowest degree with rational coefficients that has 3-i, and √7 as some of its zeros

Thank you!

06/28/18

#### Find the exact value of sin 2θ, cos 2θ, and tan 2θ and the quadrant in which 2θ lies. Cos θ=-20/29, θ is in quadrant III?

Thank you!

Precalculus Homework

06/24/18

#### Wind resistance is jointly proportional to velocity and surface area of the object.

If an object is traveling 36 mph and has a surface area of 47 square feet it will experience a wind resistance of 380.7 Newtons. How fast must an object be moving to experience a wind resistance of...
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Precalculus Homework

06/24/18

#### Suppose z varies directly with x and inversely with the square of y . If z = 6 when x=2 and y=4 , what is z when x = 10 and y=6 ?

Not sure how to work out both to find z=

Precalculus Homework

06/24/18

#### S varies directly as p and q. If p = 5 and q= 7 then S= 280

Find the constant of proportionality.

Precalculus Homework

06/24/18

#### A varies inversely with the square of r r and when r = 6 , A = 8 . Find r when A = 32

Write a function describing the relationship of the given variables.

Precalculus Homework

06/24/18

#### y varies directly with the square of x and when x = 5 , y = 100 . Find x when y = 196

Write a function describing the relationship of the given variables.

Precalculus Homework

06/24/18

#### C varies inversely with the square root of L and when L = 16 , C = 10. C=

Write a function describing the relationship of the given variables.

Precalculus Homework

06/23/18

#### C varies inversely with the square of L and when L=3 , C = 9. C=

Write a function describing the relationship of the given variables.

Precalculus Homework

06/23/18

#### h varies directly with the square of d and when d=4 , h = 208 h=

write a function describing the relationship of the given variables

Precalculus Homework

06/22/18

#### Need help finding the missing values and how to solve.

The value V (in millions of dollars) of a famous painting can be modeled by the equation V = 10ekt, where t represents the year, with t = 0 corresponding to 1975. In 2002, the same painting was...
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Precalculus Homework Algebra Word Problem

06/13/18

#### The roots of x^3+6x^2+4x+2=0 are r, s, and t. For what order triple of integers (a,b,c) are 2r, 2s, and 2t the roots of x^3+ax^2+bx+c=0?

roots of x^3+6x^2+4x+2=0 doubled equals the coefficients in x^3+ax^2+bx+c=0

Precalculus Homework Precalculus

06/12/18

#### Parametric Equations

Rewrite the parametric equations by eliminating the parameter.
x = 4t + 1
and
y = t - 3

06/07/18

#### Write the equation in standard form:

given the following equation of the ellipse in general form,
3x^2+y^2-6x+4y+4=0, complete the square to write the equation in standard form.

06/07/18

#### Given the function, find f^prime(x)

given the function
f(x) = 2x^4-3x^2+5x-2, find f^prime(x).
(i wasn’t sure how to type the prime symbol)

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