Recent content by athamz

Can you give me the equation? I don't know how to form equation...

But How can I do that? can you give me the first step?

I have this Equation using x and y variables. x for price per mango and y for price per mango. so the equations are 6x + 12y = 234 and 2x + 4y = 77.. But I did not get the value for the x and y using that two equations... It says in the problem that the sales clerk was wrong.. I think...

I am sorry, but I don't know how and when to start, could you help me?

Homework Statement A bag containing a mixture of 6 mangoes and 12 guavas sold for $234. A smaller bag containing 2 mangoes and 4 guavas sold for $77. An alert shopperasked the salesclerk if it was better to purchase the larger bag. The clerk was not sure, but said that it really made no...

Second Derivative Homework Statement f(x) = sin (2x)^1/2 find the f"(x). Homework Equations The Attempt at a Solution I don't know homework to do it...

oh.. so I have.. 3y^2 * y' + y' = -2 sin x y'(3y^2 + 1) = -2 sin x y' = (-2 sin x)/(3y^2 + 1) Right?

Homework Statement find the d^2y/dx^2 if y^3 + y = 2 cos x at the point (0,1) Homework Equations The Attempt at a Solution my dy/dx = (-2 sin x)/(3y^2 + 1) I don't know how to find d^2y/dx^2? And when and how will I use the oint (0,1)?

oh.. thank you so much.. Is it alright if I will get a negative answer?

oh.. meaning dA/dt = (cos^2 [/theta] - sin^2 [/theta]) d[/theta]/dt Where will I get the value for cos[/theta] and sin[/theta] ?

Homework Statement The measure of one of the acute angles of a right triangle is decreasing at the rate 1/36 pi rad/sec. If the length of the hypotenuse is constant at 40cm, find how fast the area is changing when the measure of the acute angle is 1/6 pi. Homework Equations The...