Friday
December 13, 2013

# Posts by Quidditch

Total # Posts: 494

Algebra
Close... You have the inequality correct, but when you divided both sides by -4, you you have an error on the right side. 6/(-4) = ?

Algebra
-4x + 1 >= 7 Solve this as you would if there was just an "=" sign. But, anytime you multiply or divide both sides by a negative number the inequality sign will reverse. To get you started... Subtract 1 from both sides.

algebra
1. Make sure the equation is in the form: ax^2 + bx + c = 0, which your problem is. 2. Use the quadratic formula: x1 = (-b + (b^2 - 4ac)^(1/2))/(2a) x2 = (-b - (b^2 - 4ac)^(1/2))/(2a) You can check your answers by substituting into the original equation.

algebra1
The problem says the hours will always be over 20. The charge for the first 20 hours is \$9.95. All the hours after 20 are \$0.50 each. h = total monthly hours cost = \$9.95 + (h - 20)x \$0.50 Plug in 35 for h and what do you get?

math
Be cautious about units on this problem. The problem gives the distance in feet. Gravitational acceleration in English units is about 32 ft/sec^2 .

calculus
You got it! Glad to help.

calculus
Sorry, my error... I went the wrong way! Your exponent and coefficient are wrong.

calculus
The exponent is correct, but the coefficient is not 1. If you take the derivative of your answer do you get x^4?

math
Retyping last lines... What is 10% of the new larger salary? Subtract that to find what your salary is after the 10% cut.

math
What is 10% of \$90,000? Add that to \$90,000 to find your salary after the raise. What is %10 of the new larger salary? Substract that to find what your salary is after the %10 cut.

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