11/23/15

Evaluate the function
Find f(-3) when f(x)=2x²+3x+5
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11/22/15

Evaluate the integral
∫19 (x -1)/(x1/2) dx       ANSWER: 40/3 #29, p395
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11/19/15

A rectangle is inscribed in the ellipse 10x^2+15y^2=150. write the area of the rectangle as a function of one variable (x).
I know the answer is A(x)=4x square root 150-10x^2/15, but I have no clue how to do the problem!
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11/16/15

Limit Question
How would I prove the: lim x->pi/2 on the equation (sec(x))/1+tan(x). Im stuck, thank you in advance.
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11/16/15

a rectangle hasa length 7 meters longer than double the width. the perimeter is 134 meters. find the dimension of the rectangle.
could you show steps?so i can see what you did
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11/16/15

mary has $3.50 in change. she has twice as many nickels as quarters. she has one less dime that she has quarters. how many of each coin does she have
i was really confused.....could you show steps?
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11/15/15

Find the limit. Use l’Hospital’s Rule where appropriate. If there is a more elementary method, consider using it. If l’Hospital’s Rule doesn’t apply, explain wh
Find the limit. Use l’Hospital’s Rule where appropriate. If there is a more elementary method, consider using it. If l’Hospital’sRule doesn’t apply, explain why.   lim (theta --> pi/2)   (1 -... more
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11/13/15

the denominato exceeds the numerator by 7 If 3 is added to the numerator and 1 is subtracted from the denominator theis equal to 4/5. find the original fraction
i need to no this answer quickly!
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11/11/15

Evalulate Basic Problems
My professor said for this problem to use inverse trig functions, half angle, and double angle identities.   Evaluate:   tan(2sin-1(4/5))   Please list the answer step by step and next to... more
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11/11/15

Estimate the area under the graph
Suppose you estimate the area under the graph of f(x)=1x from x=11 to x=111 by adding the areas of rectangles as follows: partition the interval into 50 equal subintervals and use the left endpoint... more
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11/10/15

Estimate the area under the graph
Suppose you estimate the area under the graph of f(x)=x3 from x=3 to x=23 by adding the areas of rectangles as follows: partition the interval into 20 equal subintervals and use the right endpoint... more
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11/10/15

a:b as c:a. If a = 1, what is b?
I realllllllly neeeeeeeeeeeeeeeed help with this equation. It's extremely important.
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11/10/15

Solve each equation for all values of x in the real number system.
Solve each equation for all values of x in the real number system.  If an exact solution does not exist, round your answers to the nearest hundredth.   1.  sin2x=sinx   2.... more
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11/09/15

Through what angle does the observer see the pole?
One end of a 9.3 foot pole is 13.6 feet from an observer's eyes, and the other end is 17.4 feet from the observer's eyes. Through what angle does the observer see the pole?
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11/08/15

Simple algebra word problem
Kady drove through the city for an hour. She drove for 2 hours on the highway, where her speed was 10 miles per hour faster than in the city. If she covered a total distance of 146 miles, what was... more
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11/07/15

the sum of two numbers is 18. if twice the smallest number is 6 more than the larger, find the two numbers.
the equation should be in the system of linear equations.
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11/07/15

Help with functions
I'm doing a problem with functions and it's asking me to find f(a+7) and simplify. The original problem is f(x)=x+5/(x-8)^2...I plugged in f(a+7) and came up with this f(a+7)=(a+7)+5/((a+7)-8)^2.... more
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11/05/15

function help
Find the derivative of the function below.   f(x)=x^2 (x+4)−2x/(x^2+1)
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11/05/15

prove that 1-sinx/secx=cos3x/1+sinx
I need the answer asap
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11/05/15

optimization problem help!
A box is constructed out of two different types of metal. The metal for the top and bottom, which are both square, costs $5 per square foot and the metal for the sides costs $4 per square foot.... more
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11/05/15

optimization problem help!
An open box is to be made out of a 8-inch by 14-inch piece of cardboard by cutting out squares of equal size from the four corners and bending up the sides. Find the dimensions of the resulting box... more
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11/04/15

Please help with trig calculus!!
F(x)= -4cos(x)-3 crosses the y axis at P and the positive side of the x axis for the FIRST time at Q.   1.Find the coordinates of P and Q 2. Find the STANDARD form equation of the tangent to... more
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11/04/15

Please help me with this calc problem!
 Chord AB joins A(-4,0) and B(0,2) on the graph of y^2=4+x   1.At what point(s) is the tangent to the curve parallel to AB? 2.At what point(s) does the perpendicular bisector of AB intersect the... more
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11/01/15

For any a, x, y...
For any a, x, y ∈ R define x⊕y = (x3+y3)1/3 and a⊗x = ³√ax.  Show that a⊗(x⊕y) = (a⊗x)⊕(a⊗y).
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10/28/15

Show that any function of the form : y = A sinh mx + B cosh mx satisfies the differential equation y^n = ym^2.
(a) Show that any function of the form : y = A sinh mx + B cosh mx  satisfies the differential equation yn = m2y.(b) Find y = y(x) such that yn = 9y, y(0) = -4, and y'(0) = 6.   I don't even know... more
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