446 Answered Questions for the topic Precalculus Homework

06/19/19

Exponential and Logarithmic Equations

ex + 45e−x − 14 = 0solve for x, round to four decimal places.

06/18/19

Exponential and Logarithmic Functions

The rate at which a battery charges is slower the closer the battery is to its maximum charge C0. The time (in hours) required to charge a fully discharged battery to a charge C is given byt = -k... more

10/28/18

Find a formula for the inverse of the following.

f(x) = ax + b,  a ≠ 0

10/08/18

Use substitution and elimination method.

Substitution: y=x2-6x+9                      y+x=5     Elimination: y=x2-11x-36                   y=-12x+36

10/03/18

I don't know how to do this pre-calc problem. Please help me.

g(n) = - 7 (9n - 1) (3n + 1)n - intercept : (n, g(n)) :: ________ [smaller n - value]n - intercept : (n, g(n)) :: ________ [larger n - value]y - intercept : (n, g(n)) :: ________

10/02/18

Find the cubic polynomial with zeros 3 and 3+4i ( and 3-4i) and having f(1) = 64

Find an nth-degree polynomial function with real coefficients satisfying the given conditions. If you are using a graphing utility, use it to graph the function and verify the real zeros and the... more

10/01/18

The sum of two numbers is 44. Express the product of the​ numbers, P, as a function of one of the​ numbers, x.

The sum of two numbers is 44. Express the product of the numbers, P, as a function of one of the numbers, x.

10/01/18

An elevator at a construction site has a maximum capacity of 2910 pounds. If the elevator operator weighs 190 pounds and each cement bag weighs 85 ​pounds,

how many bags of cement can be safely lifted on the elevator in one trip?

10/01/18

A local bank charges ​$14 per month plus 3cents per check. The credit union charges ​$2 per month plus 6cents per check.

How many checks should be written each month to make the credit union a better deal?

10/01/18

A truck can be rented from Company A for ​$90 a day plus ​$0.30 per mile. Company B charges ​$30 a day plus ​$0.70 per mile to rent the same truck.

How many miles must be driven in a day to make the rental cost for Company A a better deal than Company B's?

09/27/18

If \$70000 is invested at 5% compounded quarterly, how long will it take for the investment to triple in value?

need to know how many years it will take to triple in value.

09/24/18

Determine the quadratic function f whose graph is given. The vertex is (-3,-13) and the y intercept is -4

I do not have a description I’m just stuck and i need help. I really need help like really need help

09/20/18

f(-4)=8 and f(-1)=4 write a linear equation y=f(x)

It has to be written for and equation for a linear function and then I have to graph it to get the all of the answer for the problem correct

09/19/18

Arbitrary point

P(x,y) is an arbitrary point on the circle X2+y2=1. Express the distance d from P to the point A=(3,0) as a function of the x cooridinate of P. state the domain and range of the function.

09/18/18

What is the height function?

The height s above the ground at time t of a falling object is given by s(t) = −5t2 + v0t + s0 where s is in meters, t is in seconds, v0 is the object's initial velocity in meters per second and s0... more

09/16/18

Find a point on the y-axis that is equidistant from the points (6, −6) and (3, 3).

Find a point on the y-axis that is equidistant from the points (6, −6) and (3, 3).

09/15/18

Rate and interest

Mr. Jackson borrowed money from his bank and on his life insurance to start a business. His interest rate on the bank loan was 10%, and his rate on the insurance loan was 14%. If the total amount... more

09/11/18

Will the rainwater tank fill up?

A huge storm is quickly filling up Manuel’s rainwater collection tank. Manuel wants to know if his 1000 gallon tank will overflow in the next hour, so he uses a rain gauge to determine that rain... more

08/29/18

Solve System Of Equations

I have a question on how to simplify this system of equations. If a free variable is needed please use the parameter t.   4x-y+z=6 2y+6z=36 x+z=6   Thank you!

08/28/18

How far did Mark row if the entire trip took 4 hours?

Mark can row upstream at 5mph and downstream at 11mph. If Mark starts rowing upstream until he gets tired and then rows downstream to his starting point.

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.

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... more

08/05/18

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

This is for my pre-calc homework )':

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