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Posts by Rocky

Total # Posts: 155

Chemistry
A robust first grader goes for swimming lessons three times a week,and he enjoys it thoroughly.During the first week of December, he develops an upper respiratory infection, starts coughing continuosly, and has a high fever of 39ºC. His condition remains the same after ...

intermediate algebra
rewrite with positive exponents. Assume that even roots are nonnegative quanities and that all denominators are nonzero. [3/ua^2)^-4

intermediate algebra
SOLVE BY FACTORING 2a^2-3a=-5

intermediate algebra
can you please help find the solution to this equation. Your help would be greatly appreciated

intermediate algebra
Rowing. Abby rows 10km. upstream and 10km. back in a total time of three hours. The speed of the river is 5km./h. Find Abby's speed in still water.

intermediate algebra
Express in terms of i. 2 divided by sqrt.,-36

intermediate algebra
Given the quadraticf(x)=x^2-14x+49, find a value of x such thatf(x)=36

intermediate algebra
Express in terms of i. 2sq.rt.divided by-36

intermediate algebra
use polynomial long division to divide 25x^3+40x^2+25x+10 by -5x^2-3x-2

intermediate algebra
Subtract. (5x^6+9x^4-2x^3-3)-(8x^6-8x^5+x^4-4)

intermediate algebraDivide
Using polynomial long division to divide. 25x^3+40x^2-25x+10 by -5x^2-3x-2

intermediate algebra
use thr discriminant to determine wheather the following equations have solutions that are two different rational solutions;two different irrational solutions; or two imaginary solutions.8x^2+7x+3=0

intermediate algebra
I understand where I should what from where plz help me out. It would really be appreciaeted.

intermediate algebra
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions,state this. 3x+7y=77 -2x+7y=42

intermediate algebra
rewrite with positive exponents. Assume that even roots are of nonnegative quantities and that all denominators are nonzero. [3}^-4 --- ua^2}

intermediate algebra
Solve using the elimination method. Show all work. If the system has no solution or an infinite number of solutions, state this. 3x+7y=77 -2x+7y=42

intermediate algebra
Solve uing the subtitution method. Show your work. If the system has no solution or an infinite number of solutions, stat this,3x-15y=-12 3x+24y=-12

intermediate algebra
if a stone is tossed from the top of a 310 meter building, the height of the stone as a function of time is given by h(t)=-9.8t^2-10t+310. where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest hundredth's...

intermediate algebra
In solving the equation (x-1)(x+2)=30. Eric stated that the solution would be x-1=30¨T¡úx=31 or(x-2)¨T30¨T¡úx=32 However, at least on of these solutions fails to work when subsitituted back into the orignal equation. Why is that? Please ...

intermediate algebra
compleletly factor the following expression 9y^2-16z^2

intermediate algebra
factor out the greatest common factor from the expression 6x^3yz^4-3x^2y^3z^4-18^4y^2z^3

intermediate algebra
factor out the greatest common factor from the expression 24xyz^2+20x^2yz-4x^2z^2

intermediate algebra
completely factor the expression 150x^2-420xy+294y^2

algebra
factor the expression a^2-6ab+9b^2 into a product of binomials

algebra
factor out the greatest common factor from the expression 18x^5+48x^2-30x

algebra
use the "difference of squares" rule to factor the following expression. x^2-81

algebra
factor out the greatest common factor from the expression. 18x^7-14x^2

algebra
Factor the expression 25x^2-60xy+36y^2 into a product of binomials.

algebra
The area of a rectangular athletic field is represented by the expression 81y^2-16z^2 square meters. Write an algebraic expression to represent one possible set of dimensions(in the sense " length times width") of the athletic field. Include correct units with your ...

algebra
Andrew factored the expression 20x^3-12x^2+8x as 4x(5x^2-12x^2+8x). But when Melissa applied the distributive law and multiplied out 4x(5x^2-12x^2+8x),she got 20x^3-48x^3+32x^2; thus, Andrew's solution does not appear to check. Why is that? Please help Andrew to understand...

algebra
plz help I'm totally lost on this one I do not even know where to begin any help would be greatly appreciated.

algebra
factor the following expression completely: 70w^3-125w^2+30w

algebra
factor completely. remember to look first for a common factor. if a polynomial is prime,state this -4t^2+64

algebra
factorcompletely. if polynomial is prime, state this 9+8t^2-18t

algebra
factor by grouping if possible and check 5x^3+4x^2-10x-8

algebra
Essay. show all work. A gardener wants to create a triangluar garden in the shape of a right triangle with shortest legth x-3y ft. and the middle length side x+6y ft. What ia an algebraic expression for the area of the garden? be sure to multiply this out and express in ...

chemistry
equilibrium CO(g)+2H2(g)<->CH3OH(g)calculate these concentrations:CO(g) in an equilibrium mixture containing 0.933mol/L H2 and 1.32 mol?l CH3OH.

chemistry
what is the percent by mass of NaHCO3, in a solution containing 20 g NaHCO3 dissolved in 600 mL H20

chemistry
At 20°C, a solution contains 120 g of NaNO3 in 100 g of water. Is this solution saturated, unsaturated, or supersaturated?

Chemistry
a sample of gas of unknown pressure occupies 0.766 L at the temperture of 298k the same sample of gas is than tested under known conditions and has the pressure of 32.6kPa and occupies 0.664 L at 303 k. What is the original pressure of gas

AP US History
Analyze the extent to which TWO of the following influenced the development of democracy between 1820 and 1840. -Jacksonian economic policy -changes in electoral politics -Second Great Awakening -Westward movement

Algebra
Write a direct algebraic proof to show that if a/b=c/d, then a+c=b+d

World geography
Midddle Ages

Algebra
How do you simplify (r+3)^3?

physics
d=initial velocity times time + (1/2)at^2 -50=0+ (1/2)(-9.81)t^2 t=3.19 seconds

Chemistry
I agree with anon, tony is stupid

Algebra
The average mark on a test in an algebra class is 80. If the two lowest scores of 34 and 48 are not counted, the remaining scores would average 83. How many students are in the algebra class?

Algebra
1/5(a-2)-2/5(a-3)>2a-1/3(4+5a)

algebra
how do I simplify -2xyz^3/5x^2z^2 times 10xy/x^3

Math
Suppose that Barry Bonds has 148 hits in 500 at bats. How many hits does he need in his next 10 at bats to raise his batting average to .300?

adult education
A firm is assigned the network part 128.171. It selects an 10-bit subnet part. a) Draw the bits for the four octets of the IP address of the first host on the first subnet.

7th grade math
He has 13 weeks with some extra money left over!!!

Math
The mean height is 5 ft 4 in. How many students are in the class?

Biology
This is my question from my Biology paper. List which organs and tissues come from the mesoderm primary cell layer. Thanks

Geomatry
Which Solid can be defined as the regular polyhedron (a solid with all faces identical regular polygons) with the greatest number of faces? Please help thank you http://en.wikipedia.org/wiki/Regular_polyhedra There are nine regular polyhedra. Choose the one with the most faces..

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