448 Answered Questions for the topic Precalculus Homework

08/05/18

#### What is 2+3i / 6+i simplified?

This is for my pre-calc homework )':

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... more

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... more

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

#### Help simplifying?

simplify.   2sin2x/2 -1

06/28/18

Thank you!

06/27/18

#### Given the function value and the quadrant restirction, find θ?

Sin θ=-0.9744   (270°, 360°)

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... more

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=

06/24/18

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

Find the constant of proportionality.

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.

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.

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.

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.

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

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... more

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

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)

06/07/18

#### Evaluate this:

Evaluate: cos 5pi/4 + cos (-pi/6)

06/06/18

#### State the range

If f(x) = 3x+2 / x^2+6x+9, State the range of f^-1(x).

06/06/18

#### Find the coordinates of the hole:

Find the coordinates of the hole of  f(x) = x+1/x^2-4x-5   Show all work.

05/15/18

#### cot/2= squareroot 3/3

cot   √3 —  = — 2       3

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