# Posts by allie

Total # Posts: 409

**math**

If 8a?4b=20 and 4a?8b=4, then what is the value of a?b? i got 2

**math**

What is the value of x^2+y^2? if x+y=10 and x?y=8 i got 52(x=6, y=4) but its wrong

**math**

If m/n =5, then m^2?25n^2 = i got 0

**math**

If a+b=6, b+c=?3, and a+c=5, what is the value of a+b+c? i am not sure how to solve this but would you do this to solve it: A+B+B+C+A+A+C=6+-3+5

**math**

(a?b)/2 =3 and xa ? xb = 12, then x = (A) ?1 (B) 1 (C) 2 (D) 4 (E) It cannot be determined from the information given. i got c

**math**

a/b =6, b/x =36, and a=36, what is the value of 1/x ? (A) 1/2 (B) 2 (C) 3/2 (D) 4 (E) 6 i got e

**math**

If (a+b)^2=100 and (aâˆ’b)^2=64 What is the value of a^2+b^2? (A) 66 (B) 18 (C) 82 (D) 164 (E) 36 i got c

**math**

If x?y=a and x+y=b, then x^2?y^2 is: (A) a^2·b^2 (B) a^2+b^2 (C) a^2?b^2 (D) ab (E) b?a i got c is this right?

**geometry**

The lengths of the bases of the right trapezoid are 9 cm and 18 cm. The length of a longer leg is 15 cm. Find the area of the trapezoid.

**Geometry**

Given: ABCD is a trapezoid, AB = CD, BK âŠ¥ AD (they are perpendicular , AK = 10, KD = 20 Find: BC AD I got that BC is 15 and AD is 35 so I got BC/AD=15/35 is this answer right? and is so can you add the answer and an explanation

**Math**

wait, so the diagonal is 5, or 5 times 2

**Math**

Point Q belongs to side AB of square ABCD. The distances from point Q to the diagonals of the square are 2 ft and 3 ft. Find the diagonal of the square.

**geometry**

I never knew that, thanks

**math**

A rhombus has sides 10 cm long and an angle of 60 degrees. Find the distance between a pair of opposite sides. can u plz post the answer down with explanation. thanx, :)

**science**

There are different ways energy is sourced from, but one of the most eco friendly is definitely solar power.

**OK History**

I need someone to make sure my answers for my Oklahoma State History homework are correct. I put *** by my answers. If I am wrong, please explain why or help me find the right answer. Thanks in advance! 1. Indian Territory after the Civil War experienced growth in all of the ...

**ocher**

Estimate how many theoretical plates are needed to separate a mixture that has a mole fraction of B equal to 0.70 (70% B) in Figure 15.3.

**math**

The figures in (a) and (b) below are made up of semicircles and quarter circles; the figure in (c) shows a quarter of a circle in a square. Find the area and the perimeter of each figure in terms of ?.

**math**

Given: ?KLM, KL = LM = 13in, KM = 10in. Find: The area of ?KLM I got for the area 12?34 but its wrong :(

**math**

Justin is 3 years older then Sam, and Justin’s age in 2 years will be twice what Sam’s age was 3 years ago. Find their present ages. i got 14 and 17 but the answer is wrong

**math**

Richard is 6 years older than Lisa, and in 5 years the sum of their ages will be twice as much as the sum of their ages 4 years ago. Find their present ages.

**geometry**

for the area i got 36 (right?)

**geometry**

Given: ?AKL, AK = 9 m?K = 90o m?A = 60 ° Find: The perimeter of ?AKL The area of ?AKL for this one i got 81 for the perimeter side a 6 and side b is 12

**geometry**

so the answer is 6?

**geometry**

In ?ABC, m?ACB = 90°, and m?ACD = 45°. Find:AC, if CD =6?2 in. can u put answer and solution

**Geometry**

In the ?PQR, PQ = 39 in, PR = 17 in, and the altitude PN = 15 in. Find QR. can u guys show how to solve the problem(plz include answer) i got 42 by using the pythagorean theorem i am not sure if i am correct but can u check it

**Economicsquiz soon! HELP!!!...**

I don't get when to use the 7.65% and then the 1.45% How do you calculate the following below...given: number of hours worked-952 Hourly pay- $120.50 ______________________________ A. Gross pay for the year B. FICA Taxes C. Federal Income Tax D. Net Pay (A-B-C=_ ) right? ...

**Economics (help!) **

Isn't the gross pay for the year = number of hours worked (times*) hourly pay? ... If so, I get that part. I am not sure to do the others though...?

**Economics**

I don't get when to use the 7.65% and then the 1.45% How do you calculate the following below...given: number of hours worked-952 Hourly pay- $120.50 ______________________________ A. Gross pay for the year B. FICA Taxes C. Federal Income Tax D. Net Pay (A-B-C=_ ) right? ...

**physics**

if the weather channel guessed that it would rain, you would not believe them even if they have evidence of a thunder storm. My sister said that she assumed that the ball's speed would be the same going up and down so she gave "evidence" for why she thought the ...

**math**

Given: âˆ†ABC is isosceles mâˆ ACB = 120Â° mâˆ BMC = 60Â° CM = 12 Find: AB can you guys help I'm really struggling with proofs (statement and reasons)

**Chem**

If test tube 1: 2 grams KNO3 test tube 2: 4 grams KNO3 test tube 3: 6 grams KNO3 test tube 4: 8 grams KNO3 Why would test test tube #1 take longer to recrystallize?

**Math**

Mr.Rivas bought a can of paint.He used 3/8 of it to paint a bookshelf. He used 1/4 of it to paint a wagon. He used some of it to paint a birdhouse and has 1/8 of paint left. How much did he use for the birdhouse

**math**

I did it a vary different way and i meant 16, i think i pressed that wrong key and for the slower car i got 42 not sure how though but thanks for your help Steve!

**math**

Two trucks are traveling in the same direction, one going twice as fast as the other. At the end of 6 hours they are 204 miles apart. How fast is each travelling? Can you guys show me the answer i got 68 and 146 but its wrong

**math**

Solve the equation for x. For each of the following problems is it possible for x to be equal to: 1? (x+m)/(x?1)=1 If m ? -1, there are no solutions\ if m=1, the solution is ? Ii do not now how to find the solution for if m=1 but i got all real numbers, but my teacher says ...

**math**

sorry i just realized that i tied that under my sister's name :)

**math**

The width of a rectangle is equal to m cm, but its length is five times greater than the width. Find the area of the rectangle. is the answer m*5m=6m

**math**

1/225b^{(3m+10)} can you guys simplify this ^_^

**Physics**

You exert a force of 200 N at an angle of 15 degrees above horizontal to pull a 10 kg box across the floor at constant velocity. If the coefficient of kinetic friction between the box and the floor is 0.42, what is the acceleration of the box?

**Calculus**

Suppose that you are to make a rectangular box with a square base from two different materials. The material for the top and four sides of the box costs $1/ft2$1/ft2; the material for the base costs $2/ft2$2/ft2. Find the dimensions of the box of greatest possible volume if ...

**algebra 2**

Write a quadratic equation with roots 2 - 3i and 2 + 3i. I just need confirmation I did it correctly. I got y = x^2-4x+13

**math**

Mom has 2 apples and 3 bananas. Every morning for 5 days she is going to give her son an apple or a banana. What is the probability that the boy will get a banana at least two days in a row during these five days?

**math**

A student has passed 60 percent of the 20 quizzes he has written so far successfully. If the student writes 50 quizzes during the year, and passes 80 percent of the remaining quizzes successfully, what would his average percentile be? same with this one

**math**

i think it's right

**math**

The ratio of the number of Mimi’s Eminem cd’s to the number of Rita’s Eminem cd’s is 5:8. Rita has 18 more Eminem cd’s than Mimi. If Rita gives 22cd’s to Mimi, what will be the new ratio of the number of Mimi’s Eminem cd’s to Rita’s...

**math**

I got 14 and it wrong

**math**

I got 54.(4) but my teacher says its wrong

**math**

It takes 18 electricians 35 days to wire a new housing subdivision. How many days would 28 electricians require to do the same job?

**English**

"The Yellow Wallpaper" by Charlotte Perkins Gilman Can someone check to see if these are right? Much appreciated. I tried to include the quotes to make it a little easier. 1. The narrator's attitude towards the setting in lines 1-5 is best described as ? " ...

**Calculus**

Ship A is moving east at 20 miles per hour, while ship B is moving north at 15 miles per hour. At noon ship A was 5 miles east of an island, and ship B was 75 miles south of the island. At what rate is the distance of the ships changing at 1 pm?

**math**

the answer is neither

**math**

State whether the lines are parallel, perpendicular, or neither. Show your work.x–5y=103 and –2x=–206–10y i got neither is that right

**algebra**

Find the coordinates of the points of intersection of the graphs with coordinate axes:y=−1.5x+3

**algebra**

Find the coordinates of the points of intersection of the graph of y=13−x with the axes and compute the area of the right triangle formed by this line and coordinate axes. can u guys plz find answer + explain this problem is really hard and confusing 2 me

**Statistics**

Scores on an SAT test have a mean of μ = 1026 and a standard deviation of σ = 209. Compute the margin of error of the sample mean for a random sample of 100 students.

**Statistics**

The weight of luggage that a randomly selected airline passenger brings onto a flight has a mean of 35 lbs and a standard deviation of 6 lbs. If a flight has 80 passengers, within what range would the average weight of their luggage fall with 95% certainty?

**Chemistry**

What is the molar volume of pure water at 22 degrees Celsius?

**Is it possible if you guys can check my algebra HW**

can you check this one: green one has 9 more bushes of red currant than garden two. if 3 bushes from garden 2 were placed in garden 1 then garden 1 will have 1.5 times more bushes than garden two. how many bushes were in garden one i got no solutions x-9+3=x-3 0=3

**Is it possible if you guys can check my algebra HW**

-3x+2*(-x) x=0

**Is it possible if you guys can check my algebra HW**

two bags had 100 kilograms of sugar each. After taking out 3 times as much sugar from bag one than bag two , bag one had half as much sugar was bag two.How much sugar is left in each bag? i got 9 kilogram in bag on 1 and 0 grams in bag 2

**math**

thanks

**math**

i did am not really sure how u got that

**math**

Jammed is building a two story house in which the top floor is 12feet above the bottom floor the local building code specifies that the hight of a step cannot be above 7.5 inches what is the maximum height of a step in a staircase that jammed can construct between the floors ...

**math**

is 15 the correct answer

**math**

two sides of a triangle are 15cm and 18 cm in length. the altitude tossed is 10cm what is the length of the altitude to the 15 cm side?

**math**

Insert symbols from order of operations to make the statements true: 14 2 5 5 = 10 2 8 9 5 = 34 40 8 7 3 =32

**Social Studies (check my answers)**

'Yes' is right!!!! I just got 100%!

**Maths**

Given sec θ =(square root) 10 and tan θ = 3, determine the following, csc(90° − θ)

**Maths**

If sinθ = (square root) 3/2 , find the value of θ in degrees (0 < θ < 90°)

**English**

B is wrong. It is C

**Chemistry**

What is the pH of a solution prepared by mixing 50.0 mL of 0.010 mol/L HCl(aq) and 50.0 mL of 0.010 mol/L Ca(OH)2(aq)? Assume the temperature is 25 degrees Celsius. Additional information given: Kw = 1.0×10^−14 at 25 degrees Celsius. The possible answers are: A) 2....

**enlish part 1**

A Lincoln Preface is an example of what kind of writing?

**math**

and i was the one who did not show the work

**Chemistry**

0.012

**CHEMISTRY**

I'm showing the procedure of the lab and what was asked. What I have question on is towards the end. Much help would be appreciated a lot!! First I had to balance the equation given to me: 2 Na HCO3 (s) Δ over arrow (produces) Na2 CO3 (s) + CO2 (g) + H2O (g). From the...

**CHEMISTRYHELPP!! BOBPURSLEY**

I only did that ^ to get your attention. Thankyou for your help.. 2. so is it 2.9000 because technically that's wrong cuz theres 3 digits on the right of the period right? or is it 20.900 but that woudn't make sense. even if it was 02.900, the zero wouldn't matter...

**CHEMISTRY**

I'm showing the procedure of the lab and what was asked. What I have question on is towards the end. Much help would be appreciated a lot!! First I had to balance the equation given to me: 2 Na HCO3 (s) Δ over arrow (produces) Na2 CO3 (s) + CO2 (g) + H2O (g). From the...

**Chemistry**

1. Would it be advisable to determine the freezing point of pure p-dichlorobenzene with one thermometer and the freezing point of the solution with a different one? Explain. 2. If 0.150 mole of a nonvolatile non-electrolyte solute is present in 1200g of water, what are the ...

**English**

Why do u put like three stars in the end is the the answer

**Algebra 2**

Find the x and y intercepts for the following parabolas. y=(x+12)^2-144 y=(x-8)^-4

**math**

A.) write the rational expression as an equivalent expression whose denominator is the given polynomial. 1.) 6/7x^2y = ________/49x^3y^2 B.) perform the indicated operations, simplify if possible. 2.) x^2-3x-4/x^2-16 x x+4/3x-9

**Algebra**

A 6 m by 9 m swimming pool is surrounded by a deck which has a constant width. How wide is the deck if its area equals the area of the pool? I got 6*9=54 so for the deck xy=54 but I don't know where to go.

**Algebra**

Great Job Steve, I like that you didn't put only the answer. I needed help with the last one and you really helped.

**AP Chemistry**

Hey guys! I have answers, but am confused. Please and thanks for any help! A) Which of the following is false? 1.A spontaneous change occurs by itself without assistance. 2.The greater the statistical probability of a state, the greater is its entropy. 3.A non-spontaneous ...

**AP Chem (Conceptual Questions)**

Hey guys! If you could just please, look over a few of these conceptual problems because I'm pretty confused? (I put what I think is the answer below each question). Thank you for any help in advance!!!! A.Which statement *does not* apply to a heterogeneous catalyst? 1.It ...

**AP Chem**

Hey guys! I'm not really stuck on this problem, but I was wondering if someone could look it over to make sure that what I did makes sense. Thank you: 1) Balance this equation. What is the coefficient in front of I2? IO− + I− --> I2 in acidic solution Maybe ...

**AP Chemistry**

I'm so sorry to bother you guys again! Stuck on two other questions: 1. In the following equilibrium: NaCl(s) Na+(aq) + Cl–(aq), would adding more NaCl(s) increase the Cl-(aq) concentration? Explain why. My thoughts: I thought that it wouldn't increased the Cl- ...

**AP Chem (Thanks!)**

Hey guys! Stuck on some! My maybe answers are written next to the problem (1 problem-5 parts). Thanks for any help: 1. Lead (II) chromate, PbCrO4, is a slightly soluble salt. Write a net ionic equation for the dissolution of solid PbCrO4 in water. My thoughts: PbCrO4+2H+-->...

**CHEMISTRY!!!**

12.) If 4.75 * 10^23 atoms of silver are placed on one side of a platform balance, how many atoms of gold should be placed on the other side to balance this quantity of silver? Atoms to Atoms? How would I convert that. It's kind of live a division problem too but how to ...

**Chemistry**

12.) If 4.75 * 10^23 atoms of silver are placed on one side of a platform balance, how many atoms of gold should be placed on the other side to balance this quantity of silver? Atoms to Atoms? How would I convert that. It's kind of live a division problem too but how to ...

**chemistry**

1.) Here is what I did. 1.500 carat diamond (C) * (200.0 mg C/1 caret diamond C) * (1 g C/ 1,000 mg C) *( 1 mol C / 12.011 g C) * (6.022*10^23 atoms C/ 1 mol C) Sorry its confusing when you type it

**chemistry**

Here are my answers after I figured it out. Are these correct though? 1.) 1.50 *10^25 atoms C 2.) 5.173 *10^23 atoms Mg

**chemistry**

1.) How many carbon atoms are contained in a 1.500 carat diamond (carbon) if 1 caret =200.0 mg? _____________________________ I don't know if I'm doing this right but I tried. Can someone help? 1.500 carat diamond (C) *(200.0 mg/1 caret) ... ...

**AP Chem (Thank you for help)**

Thank you. I got 2 and 3, but I still don't understand how to balance the first one. Can you offer any help with that? Also, if you could, could you check my last problem? I'm sorry, and thank you!

**AP Chem (Thank you for help)**

Hey guys! Stuck on some Redox Reactions. I tried my best to put as much work as I could, but I'm super stuck on these ones. Thanks for any help: 1) Balance the equation as written, what is the coefficient for O2? NH4+ + O2-->NO2− + H2O (in basic solution) Maybe ...

**AP Chem**

Hey guys! Thanks for any help in advance! I'm back with this problem: Calculate the percent dissociation for a 1.00 × 10-6 M solution of HCN at 25 °C. Ka = 4.90 × 10-10. So my question really is do I have to use water when I calculate the percent ...

**math**

112.5 = 1x

**Accounting**

In its first month of operations, Giffin Company made three purchases of merchandise in the following sequence: (1) 260 units at $5, (2) 360 units at $7, and (3) 460 units at $8. Assuming there are 160 units on hand at the end of the period, compute the cost of the ending ...

**AP Chem**

Thanks for the help! Sorry about D; I've never experiences a problem like that before. I guess I have a question about D. I understand that k2 is a lot smaller than k1, but since you get a different answer when doing the second ionization doesn't that mean that it is ...