Paul M.

04/20/19

Calculus Question

With time, t, in minutes, the temperature, H, in degrees Celsius, of a bottle of water put in the refrigerator at t=0 is given byH=4+16e-0.02tHow fast is the water cooling... more

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Geometry System Of Equation

04/20/19

How do I solve this using the system of equations?

The perimeter is 58 meters and the length is 3 meters greater than the width. Find the length and width.

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Trigonometry

04/20/19

Find all solutions of the equation in the interval [0, 2π). (Enter your answers as a comma-separated list.) sin ( x + π /2) − cos^2 x = 0

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Algebra 1

04/20/19

f(x)=(x-1)²-4 Convert into standard form, then convert into Intercept form. Write the x-intercepts, axis of symmetry, vertex and y-intercept.

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Trigonometry Algebra

04/20/19

The rectangular coordinates of a point are given. Find polar coordinates of the point such that r > 0 and 0 ≤ Ѳ < 2π.

The rectangular coordinates of a point are given. Find polar coordinates of the point such that r > 0 and 0 ≤ Ѳ < 2π.(5, -5)

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Calculus

04/19/19

Two coins are taken at random without replacement from a bag containing 9 nickels, 7 dimes and 5 quarters. Let X denote the random variable given by the total value of the two coins. Find E(X), in... more

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Calculus Calculus 3 Newton Raphson method

04/19/19

Calculus 3 - Newton Raphson Method

Hi there. Please help me solve this problem. I don't even know where to start. Thanks much.Use the Newton-Raphson Method to show that xn+1 = 2xn3 + xn2 + 10 numerator (3xn2 +... more

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Algebra 1

04/19/19

College Algebra 1

The exponential model A=105.5 e^ 0.015 t describes the population, A, of a country in millions, t years after 2003. Use the model to determine when the population of the country will be 121... more

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Algebra 1 Algebra 2 Calculus

04/19/19

what is arbitrary matrice and invertible matrice ?

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Algebra 2 Algebra

04/19/19

Find the function y(x) satisfying dy/dx=4x^-8/9 and y(-1)=-2

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Calculus

04/18/19

Suppose that f(x)=((x-4)/(x^2))

c.) Find all critical values of f. Critical value(s)=d.) Use interval notation to indicate where f(x) is increasing or decreasing. Increasing: Decreasing:e.) Find the x-coordinates of all... more

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Calculus

04/18/19

Write the sum using sigma notation: 1 + 2 + 3 + 4 + ⋯ + 129 = A ∑ n=1 B A=? B=?

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Calculus

04/18/19

Consider the function f(x)=x-9x^(1/3)

a.) The domain of this function: (-INF,INF)b.) The x-intercept(s):_____ and the y intercept(s): 0c.) The critical number(s):d.) f(x) is increasing on the interval(s) _____ and decreasing on... more

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Calculus

04/18/19

Consider the function f(x)=3cosx-cos^3x for 0<x<2pi

a.) The x intercepts areb.) f'(x)c.) f(x) is increasing on the interval(s)d.) f(x) is decreasing on the interval(s)e.) f(x) has a local maximum at x= Nonef.) f(x) has a local minimum at x=g.)... more

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Algebra 2 College Algebra

04/18/19

Exponential Equation

Not sure how to solve this .7^x+2=3^x

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Math Algebra 1

04/18/19

Flying against the wind, an airplane travels 8460km in 9 hours. Flying with the wind, the same plane travels 9240km in 7 hours....

Flying against the wind, an airplane travels 8460km in 9 hours. Flying with the wind, the same plane travels 9240km in 7 hours. What is the rate of the plane in still air and what is the rate of... more

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Calculus

04/18/19

Find the interval(s) on which the function f(x)=1+1/x+1/x2 is increasing.

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Calculus

04/18/19

Find the inflection point(s) of the function f(x)=ln(x2-4x+5)

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Algebra 1 Algebra 2 Calculus

04/18/19

Which of the following numbers cannot be a root of the polynomial function f(x)=16x7+ax3+b , where a and b are integers?

Which of the following numbers cannot be a root of the polynomial function f(x)=16x7+ax3+b , where a and b are integers? please explain a) 4 b) 16 c) 17 d) 12

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Calculus

04/18/19