MiaStarz23 Recent Activity

RE: Sorry for asking for help but there are so many, and its super hard stuff! Thanks for your help anyways! by MiaStarz23

MiaStarz23 — Sat, 17 Mar 2012 01:54:36 GMT

Sorry for asking for help but there are so many, and its super hard stuff! Thanks for your help anyways!

Please solve, and explain?

MiaStarz23 — Fri, 16 Mar 2012 16:43:31 GMT

The strength s of a rectangle beam varies jointly as its width w and the square of its thickness t. If a wood beam 8 inches wide and 3 inches thick supports 350 pounds, how much can a similar beam inches wide and 5 inches thick support? S = pounds (round to nearest pound when needed.)

Weight of an astronaut the weight w of an object varies inversely as center of the earth. At sea level (3978 mi from the center of the earth), an astronaut weighs 128 lb. find her weight when she is 288 miles above the surface of the earth and the spacecraft is not in motion.

Her weight is? IB (Round to answer to nearest hundredth.)

The function D (x) models the cumulative number of deaths from a disease x years after 1984. Estimate the year when there were 98,000 deaths. D(x) = 2473x ^2 + 5420x + 5177 There were about 98,000 deaths in the year? (Round to nearest year.)

When the sky divers initially fall from an airplane their velocity v in miles per hour after free falling d feet can be approximated by v = 60/11 ?d . (Due to the air resistance, they will eventually reach terminal velocity.) How far do sky divers need to fall to attain a velocity of 30 miles per hour? (This value for d represents the minimum distance.)
A sky diver needs to fall about? Feet to attain a velocity of 30 mph. (Do not round until the final answer. The round to the nearest foot as needed.)

Solve the equation by the square root properly. 5x ^ 2 = 11 = 0 the solution set is? (Type exact answer, using radicals as needed. Rationalize all denominators. Use a comma to separate answers as needed. Simplify your answer.)

Use the square root properly to solve the equation. (x + 5)^2 = 36 the solution set is? (Simplify your answer. Type exact answer using radicals as needed. Use integers or fractions for any numbers in expression. Use comma to separate answers as needed.)

Use of the internet in a country is given by the function f (x) = 0.485x – 1.694x + 0.315, where the output is in millions of users. N this formula x = 6 corresponds to 1996 x = 7 corresponds to 1997, and so on until x = 20 corresponds to 2010. Estimate when the number of internet users in the country reached 85 million.

The number of internet users in the country reached 85 million during the first year? (Round to the nearest year.)

The function D (x) models the cumulative number of deaths from a disease x years after 1984. Estimate the year when there were 98,000 deaths. D(x) = 2473x ^2 + 5420x + 5177 There were about 98,000 deaths in the year? (Round to nearest year.)

Thank so much for helping!

Solve the proportion 13/9z = 7/3 z =? (Type as ...

MiaStarz23 — Fri, 16 Mar 2012 16:39:00 GMT

Solve the proportion 13/9z = 7/3 z =? (Type as integer or a simplified fraction.)

Suppose that y is directly proportional to x
(a) Use the given information to find the constant of proportionally k.
(b) Then use y = kx to find y for x = 6
Y = -55 when x = 7
(a) k = ? ( Simplify your answer. Use integers or fractions for any numbers in the expression.)

Find the variation constant in which y varies inversely as x, and the following condition exists. Y = 8 when x = ½ k =?

Your paycheck (before deductions) varies directly as the number of hours you work. If your pay check is $ 29.00 for 15 hours, find your pay for 10 hours. Your pay is?

An alligators tail length is T, varies directly as its body length B. An alligator with a body length of 2.8 feet has a tail length of 2.4 feet what is the tail length of the alligator whose body length is 4.9 feet?
The tail length is? Feet (Type as integer or decimal rounded to the nearest tenth as needed.)

The electrical resistance of a wire is directly proportional to its length. If a 4 foot long wire has a resistance of 1 ohm (s), find the resistance of a 16 – foot long wire. What is the resistance? ohms

The current I in electrical conductor varies inversely as the resistance R of the conductor. The correct is 5 amperes when the resistance is 940 ohms. What is the current when the resistance is 550 ohms? The current is? Amperes (Round to nearest hundredth.)

Solve the equation x^2 + 9 = 0 what are the ...

MiaStarz23 — Fri, 16 Mar 2012 16:34:35 GMT

Solve the equation x^2 + 9 = 0 what are the solutions of x?

Solve the equation x^2 + 37 = 0 the solution set is x =? (use a comma to separate answers . Express complex numbers in terms of I . Type an exact answer, using radicals as needed.)

Estimate a safe speed x for a car for a stopping distance of 210 feet. Use the formula 1/9 x^2 + 11/3 x = 210 A safe speed would be? Mph

Estimate a safe speed x for a car for a stopping distance of 432 feet. Use the formula 1/9 x ^2 + 11/3 x = 432 A safe speed would be? Mph

Solve ?(x=2 ) The solution is x =? (Simplify answer and type as integer or a fraction.)

?(3y+1=4 ) The solution is y =? (Simplify your answer. Type as integer or fraction. Use comma to separate answers as needed.)

Use the square root properly to solve equation x ^2 = 25
The solution set is?
(Simplify answer) Type exact answer using radicals as needed. Use integers or fractions for any number in the expression. Use a comma to separate answers as needed.)

.) Solve b ^3 = 125 b =? (Use comma to separate answers if needed)

If you could help solve any of these it would be greatly appreciated, explain answers please. Thank you so much!

Minimum wage: The table shows the minimum ...

MiaStarz23 — Fri, 16 Mar 2012 03:30:48 GMT

Minimum wage: The table shows the minimum wage for three different years.

Year 1940 1968 1997

Wage ($) 0.25 1.60 5.15

Make a scatterplot of the data in the viewing rectangle [1930, 2010, 10] by [0, 6, 1].

If current trends continue, predict the minimum wage in 2009. Compare it to the projected value of $ 7.25.

The cumulative number of car accidents from 2000 ...

MiaStarz23 — Fri, 16 Mar 2012 03:20:53 GMT

The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, c = -26x ^2 + 1040x + 11, 726, where x = 1 corresponds to 2000, x = 11 corresponds to 2010.

The breaking distance D in feet required to stop a ...

MiaStarz23 — Fri, 16 Mar 2012 03:20:20 GMT

The breaking distance D in feet required to stop a car traveling x miles per hour on dry, level pavement can be approximated by D = 1/16 x^ 2 .

a.) Calculate the breaking distance for 30 miles per hour and 70 miles per hour. How do your answers compare?

b.)If the breaking distance is 9 feet, estimate the speed of the car.

c.) Use calculator to solve part (b) numerically, do your answers agree?

a.) The breaking distance for 30 miles per hour is? Ft (Round to the nearest tenth as needed)

Solve 2z ^2 + 10z + 12 = 0 what are the solutions of the equation? (Use a comma to separate answers as needed)

MiaStarz23 — Fri, 16 Mar 2012 03:19:38 GMT

Solve 2z ^2 + 10z + 12 = 0 what are the solutions of the equation? (Use a comma to separate answers as needed)

Solve 25z ^2 = 100z + 125 what are the solutions of the equation? (Use a comma to separate answers as needed)

MiaStarz23 — Fri, 16 Mar 2012 03:19:16 GMT

Solve 25z ^2 = 100z + 125 what are the solutions of the equation? (Use a comma to separate answers as needed)

The breaking distance D in feet required to stop a car traveling x miles per hour on dry, level pavement can be approximated by D = 1/16 x^ 2 .

MiaStarz23 — Fri, 16 Mar 2012 03:18:31 GMT

The breaking distance D in feet required to stop a car traveling x miles per hour on dry, level pavement can be approximated by D = 1/16 x^ 2 .

Member since:October 01, 2009Total points:115 ...

MiaStarz23 — Thu, 15 Mar 2012 03:13:25 GMT

Member since:October 01, 2009Total points:115 (Level 1)

Your Open Question Show me another » Help solve, please? problem solving..?
Every weekend, you ride your bicycle on a forest preserve path. The path is 24 miles long and ends at a waterfall, at which point you relax and then make the trip back to the starting point. One weekend, you find that in the same time it takes you to travel to the waterfall, you are only able to return 18 miles. Your average speed going to the waterfall is 3 miles per hour faster than the return trip. What was the average speed going to the waterfall? The average speed going to the waterfall was? Per hour?

1.) Solve the equation (y – 4) (y – 3) = 0 y = ...

MiaStarz23 — Thu, 15 Mar 2012 03:12:38 GMT

1.) Solve the equation (y – 4) (y – 3) = 0 y =? (Use a comma to separate answers as needed)

2.) Solve the equation (x – 4) (2x + 1) = 0 x =? (Use a comma to separate answers as needed)

3.) Solve and check b^2 – 16 = 0 b=? (Simplify your answers. Use a comma to separate answers needed.)

4.) Solve & check r^2 + 13r + 40 = 0 r =? (Use a comma to separate answers as needed.)

5.) Solve & check 2d^2 + 5d – 3 = 0 d = 0 (Type an integer or a simplified fraction use a comma to separate answers as needed.)

6.) Use the Pythagorean Theorem to find the values of x in the figure. x – 6, x + 6, x x = ? (Type as an n integer or a simplified fraction.)

12.) The polynomial 0.0014x ^3 – 0.07x ^2 + 1.5x + ...

MiaStarz23 — Thu, 15 Mar 2012 03:12:03 GMT

12.) The polynomial 0.0014x ^3 – 0.07x ^2 + 1.5x + 12 models natural gas consumption in trillions of cube feet, where x = 0 corresponds to 1960, x = 1 to 1961, and so on.

In which year between 1970and 1990 was natural gas consumption about 27trillion cubic feet?
The natural gas consumption was about 27 trillion cubic feet in the year? (Round to nearest year as needed.)

13.) Solve 8/z + 6 = 7/ 5 – 8 Is the answer A.) The solution is z =? Or B.) There is no solution (Simplify answer as integer or fraction.)

14.) Solve 9/x + 4 = 8 / x – 2 is the answer

A.) x =? (Use a comma to separate answers as needed.) Or

B.) There is no solution

15.) Solve and check your answer 10/ x + 2 + 2/ x+ 2 = - 2 is it?

A.) The solution set s? (Type as integer or a simplified fraction. Use a comma to separate answers as needed.)

B.) There is no solution

16.) Solve the equation for M. f = - GMn / d ^ 2 The answer is M = ?

Math questions, please help

MiaStarz23 — Mon, 12 Mar 2012 17:24:43 GMT

A.) Write the expression (-216) 4/3 in radical notation
B.) Evaluate the radical expression
A.) Write the expression in radical notation. (Do not evaluate)
(-216) 4/3 =? (Type exact answer using radicals as needed.)

Add Z/Z^2 -2z – 3 + 5/5+1 the sum is? (Simplify)

Simplify. Ansume that all variables represent postive real numbers. ?72a ^19 (Type an exact answer using radicals as needed.)

Problem solving Please help answer

MiaStarz23 — Sun, 11 Mar 2012 18:43:59 GMT

1. In some other universe, K. Pack believes he has discovered a relationship between a planets distance D from its sun and the time T it takes to orbit its sun. This formula is T = , where T is in Earth years D = 1 corresponds to the same distance between Earth and our sun, or 93,000,000 miles.

(a) Planet Eta is 9 times father from its sun than Earth is from our sun. Estimate the number of Earth years required for Eta to orbit its sun according to K. Packs formula.

(b) Write this formula with rational exponents.

Help solve please

MiaStarz23 — Sun, 11 Mar 2012 16:06:07 GMT

1 ) Perform the indicated operation (2 + 9i)(2 – 9i)

Simplify answer. Type your answer in the form a + bi.)

2) Express in terms of I ?(- 5) Simplify Answer. Type answer in form a + bi

3 )Multiply (3 + ?(8))( 3 - ?(8)). Simplify and type an exact answer, using radicals as needed

4 )Combine 5 ?180 + ?45 Type an exact answer, using radicals as needed. Simplify your answer.

5 ) Subtract. Simplify by collecting like radical terms, if possible 8 ?7 – 6 ?(7= )Type an exact answer, using radicals as needed

7/ n + 1 + 2 / n + 1 + 9 / n + 1 Please Help solve!

MiaStarz23 — Sun, 11 Mar 2012 15:12:38 GMT

A container holds a total of n + 1 batteries. In this container there are 7 bad B batteries, 2 bad C battries, and 9 bad D battries. If the batteries are picked randomley by a qualified control inspector, the probablity of one the bad batteries being picked is equal to which expresson?

7/ n + 1 + 2 / n + 1 + 9 / n + 1

Simpligy expresion & Evaluate the simplified expression for n = 99

Please help solve and explain steps, thank you!

Divide and Simplify to lowest terms 2y + 5 / 3y + 1 + 2y + 5 / y + 8? Simplify and type as fraction, please answer and explain steps

MiaStarz23 — Sun, 11 Mar 2012 14:58:59 GMT

Divide and Simplify to lowest terms 2y + 5 / 3y + 1 + 2y + 5 / y + 8?

Simplify and type as fraction, please answer and explain steps

Simplify and reduce the expression to lowest terms 14t / 12t + 11 - 2t - 11/ 12t + 11

MiaStarz23 — Sun, 11 Mar 2012 05:36:46 GMT

Simplify and reduce the expression to lowest terms
14t / 12t + 11 - 2t - 11/ 12t + 11

Simplify expression to lowest terms x + 23 / x + 12 + x + 1 / x + 12 ?

MiaStarz23 — Sun, 11 Mar 2012 05:31:19 GMT

Simplfy expression to lowest terms

x + 23 / x + 12 + x + 1 / x + 12 ?

Problem Solving need help please

MiaStarz23 — Sun, 11 Mar 2012 05:28:27 GMT

If a car is traveling at 40 miles per hour on a slippery road, then its stopping distance D in feet can be calculated by D =1600/ 40 * 1/x where x is the coefficient of friction between the tires and road and 0 < x ? 1. Multiply and Simplify the formula for D , and compare stopping distance on an icy road with x = 0 .1 and on dry pavement with x = 0 .9 .

Please Help Answer

D = ?

Subtract the rational expression and simplify if ...

MiaStarz23 — Sun, 11 Mar 2012 04:58:39 GMT

Subtract the rational expression and simplify if possiable

- 11x ^2 /x +2 4 - 12x ^2/ x +2

If I did not write this correctly, -11x ^2 is over x +2 like fraction, and 4-12x ^2 is on top of, x + 2 like fraction. However its asking to subtract the rational expression and simplify if its an opition, please help and explain.

Simplify the expression (7x + 9) (x - 4)/ (7x - 9) (4 - x)

MiaStarz23 — Sun, 11 Mar 2012 04:45:50 GMT

Simplify the expression (7x + 9) (x - 4)/ (7x - 9) (4 - x)

Silplify by removing factors of 1 24r ^6/ 27r ^9 (Simplify Answer/and explain steps)

MiaStarz23 — Sun, 11 Mar 2012 04:42:02 GMT

Silplify by removing factors of 1

24r ^6/ 27r ^9 (Simplify Answer/and explain steps)

9x ^2 + 42x + 49 Please help solve

MiaStarz23 — Sun, 11 Mar 2012 04:38:08 GMT

A square has an area of 9x ^2 + 42x + 49. Find the length of a side. (Simplify Answer, and explain steps)

RE: Factor the difference of two cubes x^3 - 64 ? Simplify Answer by MiaStarz23

MiaStarz23 — Sun, 11 Mar 2012 03:58:06 GMT

(x-4)(x^2 + 4x + 16)

Factor the difference of two cubes x^3 - 64 ? Simplify Answer

MiaStarz23 — Thu, 08 Mar 2012 15:08:32 GMT

Factor the difference of two cubes x^3 - 64 ? Simplify Answer