# Posts by anonymous

Total # Posts: 116,506

Maths
Siphon is years older than Betty. In 3 years time Siphon will be twice as old as Betty.how old is Siphon now?

Math
Pantry package potluck portfolio help 5 items

math
The ratio of perimeters of two squares is 1:2. The perimeter of the larger square is 16cm. What is the length of one side of the smaller square?

Math

More physics help
A solid cylinder with a radius of 5.08 cm starts from rest at the top of a 12m long ramp inclined 20.3 degrees above the horizontal. When it reaches the bottom of the ramp 3.25s later the cylinder has a final linear velocity of 7.38 m/s. What was the average angular velocity ...

Math
Compare partial products and regrouping. Describe how the methods are alike and different

Physics Help
A student is trying to reduce the mass of a racing bike to achieve greater acceleration. Which would be more beneficial to reduce (assuming each has identical mass)? a. decrease mass in the frame b. decrease mass in the wheels c. decrease mass in the rider d. these are all equal

Hi, I'm in 11th grade, what fiction books would you recommend? Historical or science fiction books would be greatly appreciated.

Chemistry
0.1825 g of Fe(NH4)2(SO4)2•6H2O is dissolved in 250.00 mL of solution; this is Solution A. 5.00 mL of Solution A is transferred to another flask, and it is diluted to a total of 100.0 mL to make another solution, which is Solution B. Next, 3.00 mL of Solution B is diluted...

Chemistry
3. 0.1825 g of Fe(NH4)2(SO4)2•6H2O is dissolved in 250.00 mL of solution; this is Solution A. 5.00 mL of Solution A is transferred to another flask, and it is diluted to a total of 100.0 mL to make another solution, which is Solution B. Next, 3.00 mL of Solution B is ...

math
33737473

earth science
products that conserves resources portfolio

Social Studies
DAB DAB DAB DAB DAB DAB!

Social Studies
It is D A B XD I just realized that

chemistry
Consider the reaction 2 Al2O3(s) ? 4 Al(s) + 3 O2(g). ?H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ? 1. -21,962 kJ 2. -2735 kJ 3. -1368 kJ 4. -26,521 kJ 5. -685 kJ 6. -5477 kJ 7. -424 kJ 8. -1695 kJ

PreCalculus
(cos/sin + 1/sin)(1-cos) =(cos/sin+1/sin)(1)+(cos/sin+1/sin)(-cos) = cos/sin+1/sin-cos^2/sin-cos/sin = (1/sin )(1-cos^2) but 1-cos^2=sin^2 so sin^2/sin = sin

physics
Determine the coefficient of friction between a girl's skis and the snow when she skis down a 20° degree hill and her ending speed is exactly two-fifths of what it would have been if the slope had been frictionless.

Algebra
This week at Record World, records by Girl Jill cost \$1.10 less than usual. This is a 20% decrease. What is the current price?

Chemistry
The density of a solution of hydrochloric acid is 1.0929 g/cc, and it is 19.00 percent by mass. What volume of the solution (in milliliters) do you need to supply 30.0 g of hydrochloric acid? I'm not sure how to start

Chemistry
A crystal of ice has a density of 0.917 g/cc. (a) What is the mass (in grams) of an ice crystal with a volume of 1.666 cm3 ? (b) What is the density of ice in kg/m3 ? (c) What is the volume (in mL) of an ice crystal that weighs 2250 mg? a)1.53 b)900 c)2 Im not sure why I got b...

Chemistry
Adding 2.00 g of Mg metal to 95.0 mL of 1.00 M HCl in a coffee-cup calorimeter leads to a temperature increase of 9.2°C If the molar heat capacity of 1.00 M HCl is the same as that for water [cP = 75.3 J/(mol ? °C)], what is ?Hrxn? The answer is -44.4 kJ/mole in the ...

Algebra
Thank you very much. It makes a lot of sense now. Now I can do the problems that are similar to this.

Algebra
Help plz. This doesn't make any sense to me.

Algebra
This year, 7 fewer students tried out for Lesterville High School's football team than tried out last year. This is a 14% decrease. How many students tried out last year? This year?

physics
a tennis player receives a shot with the ball travelling horizontally at 50.0 m/s and returns the shot with the ball traveling horizontally at 40.0 m/s in the opposite direction. what is the impulse delivered to the ball from the tennis racquet?

Math
Chris is four times as old as Grace and Chris is 36 years older than Grace. How old is Chris

chemistry
c6+h6+o2=co2+h2o in acidic medium balance by oxidation method

science
a body is moving with a initial velocity of 2m/s with constant acceleration of2m/s^2.another body starts from rest with constant acceleration of 6m/s^2.find how far from the second particles overtake the first

physics
A 6.25-gram bullet travels at 365 m/s. It hits and enters a 4.50-kg crate. The crates slides 0.15m along a floor until it comes to rest. Find the friction force between the crate and the floor I used p=mv to get momentum and got 2.28125 N•s I calculated speed of the crate...

physics
Two cars are on a collision course. One is going right 18 m/s and has a mass of 860kg. The other is going left at 24 m/s and has a mass of 840 kg. 1. Find the total initial momentum of the two cars For this question I did first car: 860(18) = 15480 second car: 840(-24) = -...

Maths
A tailor had 10 m of cloth. He used 2 m 40 cm and 2 m 60 cm to make two shirts. How much cloth was left?

Algebra Help!!
1+2333758=2333759

gr. 9 Sience
I have no idea can someone please tell me so I can understand what this question is asking?

Biology
Examine the experiments that Griffith performed using rough and smooth pneumococcus bacteria. what type of material is being injected into the mouse And what effect it has on the mouse. (There is a picture from left to right: Rough strain (nonvirulent) = mouse survives Smooth ...

Math
AB=3

Math
cat

physics
A locomotive is running at a constant speed of 100 km/ h. The diameter of driving wheels is 1.8 m. The stroke of the piston of the steam engine cylinder of the locomotive is 600 mm. Find the centripetal acceleration of the crank pin relative to the engine frame

Geography
Why is the amazon basin ecologically so important

help meee
it is 2....

help meee
hii

Algebra
A water tank can be filled by an inlet pipe in 6 hours. It takes 3 times as long for the outlet pipe to empty the tank. How long will it take to fill the tank if both pipes are open?

College Algebra
Train A has a speed 15 miles per hour greater than that of train B. If train A travels 240 miles in the same times train B travels 180 miles, what are the speeds of the two trains?

algebra
A fish swims at a speed of 12 miles per hour. A boy swims at a speed of 4.4 feet per second. 3 ft = 1 yd 5280 ft = 1 mi How much faster does the fish swim than the boy in yards per minute?

algebra
A taxi service offers a ride with an \$5 surcharge and charges \$0.50 per mile. How many miles can a customer travel and spend at most \$30? What linear inequality with variable x represents this situation? What is the solution to that inequality? Enter the solution as an ...

Algebra
The current of a river is 2 miles per hour. A boat travels to a point 24 miles upstream and back in 5 hours. What is the speed of the boat in still water?

algebra
Dori and Malory are tracking their steps taken as a health goal. Dori leaves her house at 12:00 p.m. and walks at 50 steps per minute. Malory leaves her house at 12:20 p.m. and walks at 90 steps per minute. At what time will Malory's steps catch up to Dori's steps?

Algebra
Thank You. Ms.Sue.

Algebra
Divide. I think. I got 3.

Algebra
Divide. I think.

Algebra
Ronald needs a morning breakfast drink that will give at least 345 calories. Orange juice has 115 calories in one cup. How many cups does he need to drink to reach his calorie goal?

Biology
Fur length in the fuzzy wuzzy can be short, long or short-long. Short-long is marked by a pattern of alternating short and long strands of fur over the surface of the fuzzy wuzzy. Two short fuzzy wuzzies mate and produce all short fuzzy wuzzies. Two long fuzzy wuzzies mate and...

Biology
All Crayolians have ten hands with two fingers on each hand. In addition, all the fingers on each Crayolian are the same color, either red, white or pink. A pink-handed Crayolian mates with a white-handed Crayolian. Their offspring are 50% pink handed and 50% white handed. ...

Biology
So this is complete dominance like i thought.

Biology
The scenario is imaginary. A blue alien and a green alien mate and produce 1,000 offspring that are all blue. Another alien couple who share the same genotyope and phenotype as the first couple also mate and produce 1,000 offspring, all of which are blue. Males and females ...

english
Here is our check, Mr. Vons, for \$7.35.

College Algebra
Thank You.

College Algebra
Kevin wants to keep his heart rate at 160 beats per minutes. During his workout he counts 25 beats in 10 seconds. A. How many beats per minute is this? b. Should he workout a little harder (is he not at least at his target heart rate)?

Statistics
based on a study by Dr.P. Sorita Soni at Indiana University, we know that the eye colors in the United States are distributed as follows: 42% brown, 35% blue, 11% green, 6% gray, and 6% hazel b) identify onw factor that might make this particular sample biased and not ...

Science
Curliness of hair follows a codiminant inheritance pattern. Curly hair = C and straight hair = S. A curly hair person mates with a straight haired person. What is the probability of having an offspring with wavy hair? A)0/4 or 0% B)1/4 or 25% C)2/4 or 50% D)3/4 or 75% E)4/4 or...

sOCIAL STUDEIS
i PICKED a AND c AM I RIGHT

sOCIAL STUDEIS
How did the state colonization law affect Texas? Select all that apply. It encouraged settlers to come to the area. It gave empresario grants to people such as Stephen F. Austin. It promoted cheap land where they could raise crops. It helped the American Indians of Texas ...

Chemistry
The space shuttle environmental control system handles excess CO2 (which the astronauts breathe out; it is 4.0% by mass of exhaled air) by reacting it with lithium hydroxide, LiOH, pellets to form lithium carbonate, Li2CO3 , and water. If there are four astronauts on board the...

physics
Well my triangle didn't draw so I'll try again. 5 ????? [][][][][][]? [][][][][][]? 12 [][][][][][]? [][][][][][]? [][][][][][]? If you need more help. Solve the rest of this. 5^2 + 12^2 = C^2 25 + 144 = C^2 169 = C^2

physics
Draw a line to the left and then down. You have just drawn a triangle! Then use Pythagorean rule of A^2 + B^2 = C^2 (A squared plus B squared equals C squared.) The displacement will be the value of C. 5 ????? [][][]? [][][]? 12 [][][]? [][][]? [][][]? You have been given the ...

Chemistry
If 17.0 g Al reacts with 25.0 g O2, how much excrsss reagent will remain? 4Al + 3O2 —> 2 Al2O3

Social Studies
Thank you keep up the good work

Social Studies
good luck!

Social Studies
Dab on haters! 1. A 2. A 3. A 4. C 5. C 6. A 7. A 8. B, E 9. C 10. C 11. D 12. B 13. D 14. C 100% for the SS practice.

Living environment
Why are there some common organelles across all cell types and how is that related to their functions? Why do some cells have specialized organelles and how is that related to their functions?

mte
Find the slope of a line parallel to the line through the given points. (-5,-5) and (6,2)

world history
In the north or south

Biology
C = allele 1 for color c = allele 2 for color H = allele 1 for height h = allele 2 for height

Biology
Is: CH Ch cH ch Correct?

Biology
What are the possible allele combinations that could occur in a gamete produced by an individual who is heterozygous for the traits of flower color and height?

Math
Elizabeth wants to buy a new laptop computer, but she just started her baby sitting job and she hasn't earned any money yet. She figures once she starts earning income she save \$90 a month in a saving account that earns three percent interest anually. She learned that the ...

Math
Most americans throw away 1365 pounds of trash each year is it reasobable to estimate thay amerocans throw away over 10000.00 pounds of trash in 5years please explain the answer

physics
You have two cylindrical solenoids, one inside the other, with the two cylinders concentric. The outer solenoid has length â„“outer = 400 mm, radius Router = 50 mm, and Nouter = 2000 windings. The inner solenoid has length â„“inner = 40 mm, ...

Science
If you are in a spacecraft that has been launched into space your weight would do what

Personal support worker
what is your role as a personal support worker on the rehabilitation team for clients with acquired brain injury.

MATH
600

History

Intro to linear algebra
Hi Steve, please explain if the determinant is zero. I am confused.

Intro to linear algebra
For the matrix: [[1,4,2],[2,5,1],[3,6,0]] (This is 3X3) .. find out whether the columns are linearly independent. Is the 3rd column a linear combination of two other columns? In both cases find the coefficients. Please show step-by-step and explain in great detail, so I can ...

intro to Linear Algebra
Find the point that is one-fourth of the way from P=(2,-5,3) to Q=(1,-2,5). Please show step-by-step, this way I can learn it. Thank you.

Opreating System
HAHAHAHA I need the same answer too

Biology
how is variation created by independent assortment?

Language Arts
What is the theme of raymond's run. could someone just please tell me. i think it's about finding your identity

organic chem, crude mix

12) the citizens of rome put the good of the republic ahead of their own desires and the founding fathers hoped the american people would do the same

Ok! Thank you for the help! :D

1: What was the initial purpose of the Constitutional Convention? A: to write the Constitution B: to amend the Constitution C: to amend the Articles of Confederation *** D: to ratify the Constitution 2: What fundamental problem did Noah Webster see in the Articles of ...

maths
Q=6000-12p Determine the fee which should be changed to maximize daily beach revenues

math
Requires a function?

math
A bullet is found embedded in the wall of a room 2.3 m above the floor. The bullet entered the wall going upward at an angle of 39.8°. How far from the wall was the bullet fired if the gun was held 1.2 m above the floor?

math
side = 3b-4 base = b side = 3b-4 so perimeter = 7b -8 7b-8 = 55 7 b = 63 b = 9

Math
dx/sqrt[(x+1)^2 +4 ] let z = x+1 dx = dz dz/sqrt[z^2 + 4] = ln[z+sqrt(z^2+4)] = ln[x+1 + sqrt(x^2+2x+1 + 4)] because integral dx/sqrt(x^2+p^2) =ln[ x +sqrt(x^2+p^2)]

History
I agree. The other answers are not good choices.

math
try y = x-12