Search 75,566 tutors

# Solving Equations by completing the square.

I need help with these two problems:   1. y2 - 2py - 15p2 = 0   2. x2 - 3kx + 2k2 = 0

# Which of the following?

Which of the following is the quadratic approximation for f(x)=e^-x at x=0?    a) 1-x+(1/2)x^2 b) 1-x-(1/2)x^2 c) 1+x+(1/2)x^2 d) 1+x e) 1-x   Answer:...

I don't know

# Girl walks her dog twice a day. Her evening wlak is two and a half times as far as her morning walk. At the end of the week she walks her dog 30 miles. How l

Need the understand how to set up the problem asked: Girl walks her dog twice a day.  Her evening wlak is two and a half times as far as her morning walk.  At the end of the week she...

# Write the function whose graph is the graph of y equals the square root of x plus five?

I have to write a function

# what is (1/x)/2

need help solving this, its in the context of optimization, i just need help with the math.

# Find the derivative of f(x)

Find the derivative of f(x)= x^2/3(x^4/3-x^1/3+x^-5/3)

# Optimization Problems

A cylindrical can is to have a volume of 1L.  a) Find the height and radius of the can that will minimize the surface area b) What is the ratio of the height to the diameter? Do pop cans...

# Which term of the expansion contains x^8

Which term of the expansion of (x+5)10 contains x8? the term number that contains x8 is?

# Optimization Problems

A piece of plexiglass is in the shape of a semicircle with radius 2 m. Determine the dimensions of the rectangle with the greatest area that can be cut from the piece of plexiglass.

# \$18,000 invested into three accounts that pay 4%, 5.5% and 8.25% twice the amount invested into the 5.5% account as there is in the 4% account.

\$18,000 invested into three accounts that pay 4%, 5.5% and 8.25% twice the amount invested into the 5.5% account as there is in the 4% account. If these accounts earned \$1065.75 in total interest,...

# Find the constant term in the expansion

Find the constant term in the expansion of (-2x6+(5/x))21. What is the constant term?

# Which term of the expansion contains x^10

Which term of the expansion of (x2+2)8 contains x10? the term number that contains x10 is?

I NEED HELP

# Find equation of parabola

Find the equation of the parabola that goes through the points (-1,12) (1,-2) and (2,3). Use the form y=ax2+bx+c

2cos2θ+sinθ=1

# Evaluate the binomial coefficient

Evaluate the binomial coefficient: (14 11)  side note: 14 is on top of 11 in parentheses

# Rob and Nancy are working on a project. They complete portions of it on certain days. Is the project complete?

Rob and Nancy are working on a project. Rob completes 1/8 of it on Monday and 3/8 of it on Tuesday. Nancy completes 2/8 of it on Wednesday and 1/8 of it on Thursday.  Is the project complete...