12/02/14

Log question
Given that e and f are integers, both greater than one, and √(e(√e(√e)=f, determine the least possible value of e+f.                                                                                ... more
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11/17/14

write an equation
Consecutive intergers are 1 apart .The sum of three consecutive intergers is 54.What are intergers? 
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11/15/14

Prove that there is no line through the point (1,2) that is tangent to the curve y=4-x^2
the derivative or the slope to the function or the function for the tangent line is -2x, using the power rule....however  I understand that first(1,2) and (x,4-x^2) are similar..i.e if the graph... more
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11/12/14

solve equation
solve e^2x- 4e^X+3=0
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11/09/14

mixture of metals
An alloy is a mixture of metals. Suppose that a certain alloy is made by mixing 200 grams of an alloy containing 45% copper with 120 grams of an alloy containing 75% copper.
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11/09/14

Show that the sum of the first 2n natural numbers is n(2n+1)
n(2n+1)   sum first 2n natural numbers
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11/09/14

Find the sum of the multiples of 3 less than 100. Hence or otherwise find the sum of the numbers less than 100 which are not multiples of 3.
Sn = n/2( 2a +(n-1)d)
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11/09/14

Calculate the area between the function vx and x^2 in the interval [0 , 2].
Calculate the area between the function √x and x^2 in the interval [0,2].
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11/05/14

How much oxygen will burn in the following combustion reaction?
In a particular reaction, 4.5 moles of heptane burn in the presence of oxygen. C7H16 + 11O2 -> 7CO2 + 8H2O How many moles of oxygen will burn?   I'd like to understand HOW to arrive at the... more
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11/04/14

If a median of a triangle is also an angle bisector, is it also an altitude?
If a median of a triangle is also an angle bisector, is it also an altitude? I need help with this
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11/01/14

Analyzing the Motion of a Projectile
A projectile is fired from a cliff 941 feet above the water at inclination of 45 degrees to the horizontal, with a velocity of 610 feet per second. The h of the projectile can be modeled by h(x) =... more
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10/29/14

Solve the equation
Solve the equation. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.)   log7(x − 32) = log7(9x)   x=?
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10/28/14

parabola conic form
I how do I write the vertex form of a parabola given the vertex and the focus.  Example: Vertex (-3,4) Focus (-23/8,4)
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10/08/14

What is the probability of rolling doubles (1,1), (2,2), (3,3), (4,4), (5,5) & (6,6)?
What is the probability of rolling doubles (1,1), (2,2), (3,3), (4,4), (5,5) & (6,6)?
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10/05/14

Differentiation - Show steps!
Suppose y is defind implicitly as a function of x by the following equations, where g is a given differentiable function of one variable. Find an expression for y'.   a. xy=g(x)+y3 Ans: y' =... more
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10/04/14

Find the equation of the tangent line to the ellipse at the given point
(x2/a2) + (y2/b2)=1   Point (m,n)     Answer should be in terms of x,y,m,n,a,b and answer is _______=1
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10/04/14

differentiate with respect to x
a) y=e-x²    b)   y=etanx    c)  y=e2x²
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10/02/14

polyhedron
a vegetable bin built in the form of a cube with an edge of 6 ft. is divided by a vertical partition which passes through two diagonally opposite edges.Find the lateral surface of either compartment.
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10/01/14

x+y + xy+x^2+y^2 + x^3+x^2y+xy^2+y^3 + ... n terms
the sum of n terms of the above series is?
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09/30/14

the length of a rectangle is 3 feet less than twice its width, and its perimeter is between 24 and 48 feet
the length of a rectangle is 3 feet less than twice its width, and its perimeter is between 24 and 48 feet. The answer must be expressed as an inequality. Please help!!
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09/27/14

A sequence is recursively defined by
A sequence is recursively defined by  kn=kn-12+kn-2, for n>2. k1=1, k2=0. What is the value of k7? the two is supposed to be on top of n-1 not squared. The answer is 27 but I don't know how to... more
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09/27/14

binomial theorem
The coefficient of xn in the expansion of (1+x+x2+......)-n  is?
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09/25/14

The measures of the acute angles of a triangle are in the ratio 1:5. What is the measure of each acute angle of the triangle?
I'm not sure how to solve this, or what a ratio means.
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09/24/14

Surds and indices
The curve y=axn-23 passes through (3,4), (9,220) and (-1,k). Find the values of a, n and k.   Ans: a=3, n=2 and k=-20   Thank You!:)
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09/15/14

I'm at a loss. How do I integrate?
Integrate (7+10cot(x))/(10-7cot(x)) from pi/4 to pi/2
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