# 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..