Robert J.

04/05/13

write the equation of the parabola in vertex form. vertex (0,3), point (-4, -45)

Determine whether the function is linear or quadratic. Identify the quadratic, linear, and constant terms. f(x) = (3x + 2)(-6x - 3)

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Math Equations

04/05/13

An investor invested a total of $2,600 in two mutual funds.

One fund earned a 7% profit while the other a 3% profit. If the investor's total profit was $138, how much was invested in each mutual fund? The amount that was invested in the mutual... more

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Trigonometry

04/04/13

Find equations of the normal line?

Find equations of the normal line to z=sinx cosy at (0, pi, 0). Answer: x=-t, y=pi, z=-t. Fx=cosx cosy Fy=-sinx siny

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Trigonometry

04/04/13

(csc^2theta)/2=2/(1-costheta)

Establishing an Identity, Double-angles and Half-angle Fourmula

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Math

04/04/13

Solve for n. A=nz+n

I got 2 possible answers: 1. n=(A-z)/z 2. n=A/z-1 Please solve and give details for each and every step.

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Calculus

04/04/13

Help me with this calculus problem. This is a related rates problem. Do not use inverse trigonometric functions.

A man whose eye level is 6 ft above the ground walks toward a billboard at a rate of 2 ft/s. The bottom of the billboard is 10 ft above the ground and it is 15 ft high. The man's viewing angle is... more

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Math

04/04/13

waht is 2(3x-2) grater than or equail to 22

2(3x-2)>22

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Precalculus

04/04/13

eliminate the parameter t for x=3sint and y=2cost

eliminating the parameter

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Calculus

04/03/13

I need help with this calculus problem. is a related rates problem. Do not use inverse trig functions.

Once Kate's kite reaches a height of 50 feet (above her hands), it rises no higher but drifts due east in a wind blowing at the rate of 5 ft/s. How fast is the string running through Kate's hands... more

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Algebra 1

04/03/13

What is the value of c so that x² – 11x + c is a perfect-square trinomial?

The choices that i get are a) 121 b) 121/4 c) -11/2 d) 121/2 I've tried everyone of them and they don't make any sense.

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Trig Identies

04/03/13

sin(2x)+cos(3x)=0

solving between [0,2Π]

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Factoring Word Problems

04/03/13

Four times the square of a number is 45 more than eight times the number. What is the number?

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Math Question

04/02/13

ln(x+3)-ln(x-1)=2

how do you solve this problem?

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Word Problem Math Question

04/02/13

What was Sergio's failing exam score?

Sergio took four exams. He received good scores on three exams, but failed one. The teacher allows her student's to drop their lowest score. When Sergio does this, his average increases from 70 to... more

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Word Problems Algebra Equations

04/02/13

Jamie earned 15 more points on her test than Paul earned. Their points added up to 143. How many points did each student earn?

The question is self explanatory....HELP ME!!!!!

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Logarithms

03/31/13

the equivalent exponential equation of log(7J=k is

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Math

03/31/13

Find the curvature?

Find the curvature of r(t)=<e^-2t, 2t, 4>. r'(t)=<-2e^-2t, 2, 0> What to do next? Show your steps.

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Math

03/29/13

Use Gauss' Law for Electricity to find the total charge?

Use Gauss' Law for Electricity to find the total charge in the hemisphere z=sqrt(R^2-x^2-y^2) for E=<4x-y, 2y+z, 3xy>. (Answer: 4pi*Eo*R^3) The divergence is 6, I've set up the triple... more

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Math

03/29/13

if (a+3)/5 is an integer , what is the remainder when a is divided by 5?

if (a+3)/5 is an integer , what is the remainder when a is divided by 5

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Math Equations

03/29/13

A tugboat goes 120 miles upstream in 20 hours. The return trip downtown takes 5 hours.

Find the speed of the tugboat without a current and the speed of the current. The speed of the tugboat is ?(mph) And the speed of the current is what? (mph) (Simplify your answers)

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Algebra Simplify

03/28/13

Express in simplest form

3n/n^2-49 - 2/3n+21

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Math

03/27/13

Find the flux of F over Q where Q is bounded?

Find the flux of F over Q where Q is bounded by 3x+2y+z=6 and the coordinate planes, F=<y^2*x, 4x^2*sin(z), 3>. (Answer: 27/5). The divergence of the vector field is y^2, which is what I've... more

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Ratios

03/27/13