Thursday

February 23, 2017
Total # Posts: 35

**Chemistry**

If 0.812g of calcium reacts in a coffee-cup calorimeter that contains 400.0g of water/ The initial temperature of the water is 17.9°C, the final temperature is 26.0°C. Calculate the standard molar enthalpy change for this reaction.

*January 28, 2016*

**math**

Consider the equation y^2-12y=c, where c is a real constant. Assuming this equation has two distinct solutions y_1 and y_2, in terms of c, determine y_1y_2. i tried 12 and 0 they were both wrong,i have no idea what else to try

*April 14, 2015*

**Geometry**

I know that <XBC=22.5

*April 8, 2015*

**Geometry**

Point X is on line AC such that AX = 3 CX = 12. If <ABC = <BXA = 90 degrees, then what is BX? Please help I have no idea how to approach this

*April 8, 2015*

**math please help**

In the diagram below, we have DE = 2EC and AB = DC = 20. Find the length of FG. I have no idea how to do this. I did a problem almost exactly the same and approached it the same way, it did not work.

*April 2, 2015*

**Math please help**

i got AC=24 and AB= 32.78. This gave me 340.7 which was wrong. What should i do?

*April 2, 2015*

**Math please help**

In triangle ABC, we have <BAC = 60 degrees and <ABC = 45 degrees. The bisector of <A intersects line BC at point T, and AT = 24. What is the area of triangle ABC? How should i approach this?

*April 2, 2015*

**math please help**

E is on a line that intersects <AB and lies on middle of the line AC, and D is in in the middle of the line BE extending to C.

*April 2, 2015*

**math please help**

They are inside the triangle ABC

*April 2, 2015*

**math please help**

In a triangle, we have <ABC = <ACB = <DEC=<CDE, BC = 8, and DB = 2. Find AB. How should i approach this? will sss similarity work?

*April 2, 2015*

**MAth please help**

Point P is inside rectangle ABCD. Show that \[PA^2 + PC^2 = PB^2 + PD^2.\] Be sure that your proof works for ANY point inside the rectangle. Any suggestions on how to work this? Not sure how to do this or what equation i need to use.

*April 1, 2015*

**math please help**

Point X is on line AC such that AX = 3 CX = 12. If <ABC = <BXA = 90^ degrees, then what is BX? I know that <XBC=22.5

*April 1, 2015*

**Math please help**

A square is constructed using the hypotenuse line AC of right triangle ABC as a side, as shown below. Find the area of the square if AB = 5 and BC = 9. I tried to approach this by finding the hypotenuse, which i found was 10, then i used that to find the area of the square ...

*April 1, 2015*

**Math please help**

In triangle PQR, we have <P = 30 degrees, <Q = 60 degrees, and <R=90 degrees. Point X is on line PR such that line QX bisects <PQR. If PQ = 12, then what is the area of triangle PQX? I have determined that i need to use the equation PR/\sqrt{3}, but i cannot find PR.

*April 1, 2015*

**math please help**

Point X is on line AC such that AX = 3 CX = 12. If <ABC = <BXA = 90 degrees, then what is BX? I'm having a really hard time drawing this out. Is there an easy equation to use for this that won't include drawing it?

*April 1, 2015*

**math please help**

Find the area of triangle ABC if AB = BC = 12 and <ABC = 120 degrees Should approach this with SSS similarity? If yes will the answer be clear or will i need to manipulate it, and how.

*April 1, 2015*

**Geometry**

In triangle PQR, we have <P = 30 degrees, <Q = 60 degrees, and <R=90 degrees. Point X is on line PR such that line QX bisects <PQR. If PQ = 12, then what is the area of triangle PQX$?

*April 1, 2015*

**math help**

Given DC = 7, CB = 8, AB = 1/4 AD, and ED = 4/5 AD, find FC. Express your answer as a decimal. not sure how to tackle this one

*April 1, 2015*

**Geometry**

A telephone pole is supported by a steel cable which extends from the top of the pole to a point on the ground 3 meters from its base. When Leah walks 2.5 meters from the base of the pole toward the point where the cable is attached to the ground, her head just touches the ...

*April 1, 2015*

**Geometry**

I got the answer to my question. It was 45

*March 31, 2015*

**Geometry**

The lengths of the sides of a triangle are 6 cm, 7 cm and 9 cm. In a similar triangle whose perimeter is 110 cm, what is the length of the longest side, in centimeters? i know that the first triangle's perimeter is 22, but i'm not sure how this will help me.

*March 31, 2015*

**algebra**

Find the square roots of 3+4i. The answer should be in the form a+bi? The answer that i got was 2+i, but it did not seem to work. Any advice on what might be happening in this problem, and how to solve it?

*March 31, 2015*

**Algebra proof**

Prove that if w,z are complex numbers such that |w|=|z|=1 and wz\=-1, then w+z/1+wz is a real number I so far i have determined that w and z both have to equal less than one, but i cannot figure out how to prove this. if wz does not equal one it must mean that w and z both ...

*March 31, 2015*

**Math log equations/exponential form**

How do i express this to exponential form? a) log√2(w^2 x^3/y^5 z^7) b) log(x^2 y^3 √z-1)

*May 19, 2013*

**Review My Thesis**

Give me feedback on my thesis, please! Nevertheless, Renaissance art has the uttermost influence found in modern art, as the rebirth of extraordinary art styles, techniques, and mediums are still recongnized today.

*March 2, 2012*

**physics**

the final velocity of the car is 22 m/s?

*December 4, 2011*

**physics**

thanks for the answer drwls. can you please explain to me, how it happened?

*December 4, 2011*

**physics**

the momentum of 900kg car initially moving north at 10m/s increases by 10,800. calculate the final velocity of the car.

*December 4, 2011*

**Social Studies**

The answer is true.

*September 11, 2011*

**KINEMATICS IN ONE AND TWO DIMENSIONS**

CAN U PLSS HELP ME TO ASNWER THE PROBLEMS BY J.CUTNELL. PLSSS RUSH I NEED THE ANSWERS. THANK YOU GUYS.

*September 1, 2011*

**HCA 220**

I am suppose to summarize the processes of digestion, respiration and circulation. I can get this part but how to incorporate it to power point is my issue. Then explain each process and how they are interrelated. Which is what I am also a little confused about. thx

*March 9, 2011*

**HCA 220**

I am in week 4 and need guidance on where to begin my power point presentation. I have only did one other power point and it was nothing like this. I am completely at a loss. I just need an example of what to do as this seems way over my head. Help! Gem

*March 9, 2011*

**RE teachers help year 9 re**

can science prove the existance of God? ive looked on the sites suggeted for other peple but can`t find anything that helps me sorry to sound ungrateful. i need to print off what i find but i am struggling to find something. thankyou

*November 24, 2009*

**wrteah**

i think ti is wather

*June 14, 2005*

**seanSo**

i think it is season.

*June 14, 2005*

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