Tuesday

May 31, 2016
Total # Posts: 627

**plz help math**

The formula for the force between two objects is F=GMm/r^2 where M and m are the masses of the two objects, G is a constant, and r is the distance between them. Solve the formula for m .m=Fr^2/GM m=r^2/FGM m=GM/Fr^2 m=FGM/r^2
*May 26, 2016*

**math**

Elimination was used to solve a system of equations. One of the intermediate steps led to the equation 9x=27 . Which of the following systems could have led to this equation? 4x+3y=24 −5x−3y=3 7x−2y=15 x+y=6 9x+2y=21 −9x−2y=21 10x−y=15 x+y...
*May 26, 2016*

**math**

The diameter of a hydrogen atom is about 5×10^-11 meter. Suppose 8.4×10^8 hydrogen atoms were arranged side by side in a straight line. Multiply these numbers to find the length of this line of atoms. What is the length in scientific notation? 42×10^−3 ...
*May 19, 2016*

**math**

The volume of Jupiter is about 1.43*10^15 cubic kilometers. The volume of Earth is about 1.09*10^12 cubic kilometers. The number of Earths that can fit inside Jupiter can be found by dividing Jupiter's volume by Earth's volume. Find this quotient and express the answer...
*May 19, 2016*

**math**

Lisa and Katie are playing a card game, and a total of 900 points has been scored. Lisa scored 150 more points than Katie. If you let l= the number of points that Lisa scored, and k= the number of points that Katie scored, then the problem can be represented by the system: l+k...
*May 18, 2016*

**History**

Thank you so much!
*May 18, 2016*

**History**

1. What paints did the Mughals use to create their paintings? What pigments were used to create these paints? 2. How expensive were these pigments? I haven't been able to find much information regarding the paints or pigments used online, but I would be able to determine ...
*May 18, 2016*

**word problem math**

Keith has p pennies, n nickels, and d dimes in his pocket. The total number of coins is 9. The expression 0.01p+0.05n+0.10d0.01p+0.05n+0.10d represents the value of the coins, which is equal to $0.53. He has two fewer nickels than dimes. How many pennies does Keith have? Keith...
*May 17, 2016*

**math**

The area of a triangle varies jointly with the height of the triangle and the length of its base. The area of one triangle is 200 square centimeters when its height is 25 centimeters and its base length is 16 centimeters. What is the area of a triangle having a height of 20 ...
*May 17, 2016*

**math**

The volume of a pyramid varies jointly with the base area of the pyramid and its height. The volume of one pyramid is 24 cubic inches when its base area is 24 square inches and its height is 3 inches. What is the volume of a pyramid with a base area of 15 square inches and a ...
*May 17, 2016*

**math**

Video Villa rents classic video games for $2.50 for 5 days. New games rent for $3.50 for 5 days. If Rob rents c classic games and n new games, what is his cost per day, in dollars, for renting the games for 5 days? Select one: a. 0.50c+0.70n b. 0.50c+0.75n c. 0.25c+0.35n d. 0....
*May 13, 2016*

**math**

Arianna has a large piece of fabric that she wants to use to make some scarves. The number N of scarves she can make is inversely proportional to the area A of each scarf. If the area of each scarf is 3 square feet, then she can make 15 scarves. If the area of each scarf is 5 ...
*May 12, 2016*

**math**

Arianna has a large piece of fabric that she wants to use to make some scarves. The number N of scarves she can make is inversely proportional to the area A of each scarf. If the area of each scarf is 3 square feet, then she can make 15 scarves. If the area of each scarf is 5 ...
*May 12, 2016*

**Calculus**

Thank you
*May 11, 2016*

**Calculus**

The base of an isosceles triangle is 8 feet long. If the altitude is 6 feet long and is increasing 3 inches per minute, are what rate are the base angles changing?
*May 11, 2016*

**math**

The clock face in a famous clock tower has a radius of about 5 meters. What is the area of the clock face to the nearest square meter? Use 3.14 as an approximation for pi.
*May 10, 2016*

**math**

Which statement concerning the equation x^2+2=x is true? Its discriminant is 0 , so it has no solution. Its discriminant is 0 , so it has one real solution. Its discriminant is -7, so it has two complex solutions. Its discriminant is -7, so its solutions are negative.
*May 9, 2016*

**math**

A flying disc has a radius of 6 inches. What is the area of one side of the flying disc to the nearest square inch? Use 3.14 as an approximation for pi. A) 113 square inches B)452 square inches C)38 square inches D) 28 square inches
*May 9, 2016*

**Calculus**

A conical cistern is 10 ft. across the top and 12 ft. deep. If water is poured into the cistern at the rate of 1 cubic foot per second, how fast is the surface rising when the water is 8 ft. deep?
*May 2, 2016*

**Trigonometry **

At a point on the ground 125 ft from the base of a tower, the angle of elevation to the top of the tower has a degree measure of 38 degrees. How high is the tower
*April 23, 2016*

**Chemistry**

For the reaction H2(g) + I2(g) ⇀↽ 2 HI(g) at 425◦C, calculate [HI], given [H2] = [I2] = 0.000617 mol/L and K = 54.3.
*April 23, 2016*

**math**

Anthony has 7 bills. All the bills are tens or twenties. The bills Anthony has total $100 in value. How many of each hill does Anthony have? Pretty sure the solving method is solving systems of equations but you have to isolate the variables and stuff.. please help!!
*April 19, 2016*

**math**

Which statements are true for irrational numbers written in decimal form? A. Irrational numbers are nonterminating. B. Irrational numbers are repeating. C. Irrational numbers are nonrepeating. D. Irrational numbers are terminating.
*April 19, 2016*

**adding integers **

A stock lost 7 1/8 points on Monday and then another 1 7/8 points on Tuesday. On Wednesday, it gained 13 points. What was the net gain or loss of the stock for these three days? A) a loss of 22 points B) a gain of 4 points C) a gain of 18 1/4 points D) a gain of 7 3/4 points
*April 13, 2016*

**Chemistry**

Consider the following acid/base reaction CO3^2− + 2H^+ → H2O + CO2 that produces CO2 gas. 6 L of CO2 is collected at STP. What is the molarity of the HCl solution used in the reaction if 81 mL of HCl was needed?
*April 12, 2016*

**Chemistry**

You have a vinegar solution you believe to be 0.53 M. You are going to titrate 20.72 mL of it with a NaOH solution that you know to be 0.974 M. At what volume of added NaOH solution would you expect to see an end point?
*April 12, 2016*

**Factor out the Greatest Common Factor (GCF)**

Factor out the Greatest Common Factor (GCF): 45d^3-18d^2
*April 11, 2016*

**Algebra 2 **

Carla’s kitchen floor is in the shape of a perfect square. Her copycat brother, Carl, wants to re-model his kitchen so that it will have the same surface area as his sister, but his kitchen will be rectangular. The length of his floor is half the length of his sister’...
*March 15, 2016*

**Math**

A flying disc has a radius of 7 inches. What is the area of one side of the flying disc to the nearest square inch? Use 3.14 as an approximation for pi.
*February 18, 2016*

**Math**

Which is the best approximation of the volume of a cylinder with a radius of 10 mm, and a height of 5 mm? Use 3.14 for pi.
*February 2, 2016*

**math**

A square is folded vertically twice and the resulting perimeter is 20 cm.What is the peremeter of the square?
*January 26, 2016*

**Chemistry Chemical Reactions pls help <3**

2AgNO3 + CaCl2 ---> Ca(NO3)2 + 2AgCl all of the substances involved in this reaction are soluble in water except AgCl which forms a solid at the bottom of the flask . Suppose we mix together a solution containing 12.6 g of AgNO3 and one containing 8.4 g of CaCl2 .What mass ...
*January 13, 2016*

**Math**

Dixon and his little sister Ariadne stand next to each other on the playground on a sunny afternoon. Their mother measures their shadows. Dixon's shadow is 18 feet long and Ariadne's shadow is 15 feet long. If Dixon is 6 feet tall, how tall is Ariadne?
*January 4, 2016*

**Math**

What is the smallest of 3 consecutive positive integers if the product of the smallest and largest is 21 more than 9 times the middle number? x(x+2)=21+9(x+1) I'm not sure if this is a good equation to solve it..?
*January 3, 2016*

**science**

Friends are better than school Or you can learn about taxes not science Remind me to skip science Can't understand school- no meaning Everyone hates school
*December 7, 2015*

**Math**

write the first 10 multiples of 3
*December 3, 2015*

**math**

There are some caps in a box. 1/6 of them are red, 1/3 of them are blue and 3/7 of the remainder are green. If there are 27 green caps, how many caps are there altogether? How should I solve this?
*December 3, 2015*

**Social Studies**

thank you!
*December 2, 2015*

**Social Studies**

compare and contrast the experience of the creeks and cherokees in Georgia following the war of 1812 { could you please help me with this)
*December 2, 2015*

**Intro to Chemistry**

Does the Periodic table have any kind of pattern for brittleness? If so, what is it? For example, the elements on the left are more brittle, while the ones on the right are less brittle.
*November 18, 2015*

**Math**

There are 18 silver cars, 13 red cars, and 11 brown cars in a parking lot. What fraction of the cars in the parking lot are not silver?
*November 16, 2015*

**Pre-Calculus**

Big Bob is trying to shape up for the summer. He begins on the first day of his exercise program with 3 sit ups. Each day he will do 4 more sit ups than the day before. On what day will Big Bob do 115 sit ups?
*November 16, 2015*

**word problem math**

Dixon and his little sister Ariadne stand next to each other on the playground on a sunny afternoon. Their mother measures their shadows. Dixon's shadow is 18 feet long and Ariadne's shadow is 15 feet long. If Dixon is 6 feet tall, how tall is Ariadne?
*November 16, 2015*

**Math**

In science class, Savannah measures the temperature of a liquid to be 50^@ Celsius. Her teacher wants her to convert the temperature to degrees Fahrenheit. What is the temperature of Savannah's liquid to the nearest degree Fahrenheit?
*November 16, 2015*

**math**

please help*
*November 14, 2015*

**math**

Why do you have to use estimation to find the number of triangles you need for the string? {could you please me I don't understand
*November 14, 2015*

**Precalculus**

Show the first three terms of each related sequence or series and solve each problem. 1) Jerry hopes to buy a camera which costs $680. He plans to save $5 more each month than in the month before, beginning with $5 this month. In how many months will he have saved enough? 2) A...
*November 12, 2015*

**Math**

Which of the following problems would NOT have a solution? Five pizzas are shared equally among four people, and you want to know how much each person gets. Ten pizzas are shared equally among five people, and you want to know how much each person gets. Zero pizzas are shared ...
*November 10, 2015*

**Math**

Which number is not equal to one of the following expressions? 2,500 x 10 250,000 -: 100 2,500 -: 10
*November 10, 2015*

**math**

962?
*November 10, 2015*

**math**

declan works 37 hours a weeks and earns 26 dollars an hour declan earns how much in a week
*November 10, 2015*

**Math**

Dawn raises money for her school in a jog-a-thon. She will get three dollars for every lap she completes. If it takes 4 laps to jog 1 mile, and Dawn jogs a total of 12 miles, how much money will Dawn raise for her school?
*November 6, 2015*

**Math**

On an average day, 38 customers buy a bag of grapes at Jerry's Market. There are an average of 47 grapes in each bag. Round to the nearest ten and then multiply to estimate the number of grapes Jerry's customers buy every day.
*November 6, 2015*

**Math**

On an average day, 34 customers buy a bag of grapes at Jerry's Market. There are an average of 47 grapes in each bag. Round to the nearest ten and then multiply to estimate the number of grapes Jerry's customers buy every day.
*November 6, 2015*

**Math**

secondary math 2
*October 29, 2015*

**Math**

yea
*October 29, 2015*

**Math**

no its a exponent x with exponent -b
*October 29, 2015*

**Math**

simplify each expression. Your answer should still be in exponential form and only have positive exponents. x^-b
*October 29, 2015*

**Math**

two boats leave the same port at the same time. one travels at a speed of 29 mph in the direction N 50 degrees E and the other travels at a speed of 35 mph in the direction S 70 degrees E. how far apart are the two boats after an hour.
*October 28, 2015*

**11th grade math**

Simplify each expression. Your answer should still be in exponential form. Make sure that you combine all numbers with the same base. y^a/y^b
*October 28, 2015*

**11th grade math**

y^a/y^b
*October 28, 2015*

**math**

Simplify each expression. Your answer should still be in exponential form. Make sure that you combine all numbers with the same base. y^a/y^b
*October 28, 2015*

**math**

thanks
*October 28, 2015*

**math**

please help
*October 28, 2015*

**math**

Simplify each expression. Your answer should still be in exponential form. Make sure that you combine all numbers with the same base.
*October 28, 2015*

**math**

r^5s^3/rs^2
*October 28, 2015*

**math**

Simplify each expression. Your answer should still be in exponential form. Make sure that you combine all numbers with the same base. \frac{r^{5}s^{3}}{rs^{2}}
*October 28, 2015*

**Physics**

I have a question about a vector addition problem using the polygon method. Vector 1 has a magnitude of .1 and theta of 30 degrees. Vector 2 has a magnitude of .2 and a theta of 90 degrees. Vector 3 has a magnitude of .3 and a theta of 225 degrees. I'm confused because if ...
*September 29, 2015*

**Algebra**

Simplified it's 5n-4
*September 29, 2015*

**Math**

I suppose for 6x200 it's like 6x2x100?
*September 28, 2015*

**Physics**

6. A car traveling 64 km/hr (40 mi/h) brakes suddenly to avoid a dog crossing the road. It accelerated at a rate of -1350 mi/h2. What was its speed after 0.5 min?
*September 28, 2015*

**math**

The hundredth and thousandth places.
*September 28, 2015*

**Math **

An auditorium contains 315 occupied seats and was 7/9 filled. How many empty seats were there?
*September 28, 2015*

**Chemistry**

What happens when you mix ammonium chloride and sodium nitrate? I don't need any equations, just what would you see when you mix them together Thanks~
*September 22, 2015*

**math**

Well the smallest prime is 2, so now you've got 0.2 something If the hundredth digit is twice the tenth, then it should be 4. But the part about the GCF being 18 and 27 I don't get
*September 22, 2015*

**Algebra**

6.24 seconds. 15.6/2.5 = 6.24
*September 22, 2015*

**Algebra**

Um, I suppose it's (-0.7)-(-2.5)
*September 22, 2015*

**Algebra**

Height of K2 - 11,194 = height of Mt. Kenya. You can't solve this equation, there's not enough information given.
*September 22, 2015*

**unisa**

for anyone who wants to answer this. The person is probably talking about this articletheguardian(dot)com/world/2014/apr/07/india-elections-nehru-gandhi-dynasty
*September 22, 2015*

**Physics: Please help!**

I can't figure this out at all...Can someone please explain it to me? It has been claimed that an insect is the best jumper in the animal kingdom. This insect can accelerate at 3950 m/s2 over a distance of 2.3 mm as it straightens its legs. (a) Assuming a uniform ...
*September 21, 2015*

**Physics**

I cannot figure out this question, and it would be greatly appreciated if someone could help me out! :) It has been claimed that an insect is the best jumper in the animal kingdom. This insect can accelerate at 3950 m/s2 over a distance of 2.3 mm as it straightens its legs. (a...
*September 21, 2015*

**social studies**

Mesoamerica
*September 21, 2015*

**social study**

that's called commerce
*September 21, 2015*

**Math**

Can some please explain what I have to do to get the answer? An airplane passes directly over Seneca High School. A student at Cherokee High School, which is 4.3 miles away, finds the angle of elevation of the plane to be 19°. Find the altitude of the plane.
*July 16, 2015*

**Geometry**

Angles A and C are complementary, and angles C and B are supplementary. If Angle A = 45 degrees, what is the measure of angle B?
*July 16, 2015*

**Geometry**

YW bisects angle XYZ. The measure of angle XYZ = 80 degrees. Find the measure of angle XYW
*July 16, 2015*

**math**

Yeah thank you Pete...
*April 30, 2015*

**math**

I think it's D. Please answer still. Thanks
*April 30, 2015*

**math**

What will the graph look like for a system of equations that has no solutions? A. The lines will be perpendicular. B. The lines cross at one point. C. Both equations will form the same line. D. The lines will be parallel. Is the answer B?? Thank you
*April 30, 2015*

**language arts**

page 1738!
*April 28, 2015*

**chemistry **

25.0 ml of 15% NH4NO3 solution is diluted to 300.0 ml. What is the concentration of the diluted solution? .15% x 25=3.75ml Do I divide by 300ml and that's my answer?
*April 16, 2015*

**math**

A bus left the bus station with 90% of the seats full. After six stops, a total of 26 passengers got of the bus and 4 passengers boarded the bus. Now, 35% of the seats are full, How many seats are there on the bus ? 35%*2= 70%= 2*22=44 seats.
*March 17, 2015*

**Chemistry**

how much vinegar produces 0.240 moles of acetic acid?
*March 10, 2015*

**math**

An antique clock takes 5.5 seconds to chime at 3 o'clock. How long does it take to chime at 9 o'clock ? 5.5/2= 2.75x8=22seconds
*March 4, 2015*

**Language arts**

yeah the answer is c :)
*February 27, 2015*

**Science**

California's volcanoes formed as the result of what type of plate boundary?
*February 6, 2015*

**History help?**

1. is D. 2. C, well thats where it was started in NY, but it could be B because it had spread out to let people know about rights that women should have. I'll say B ?
*January 21, 2015*

**History help?**

1.Southern states began to leave the Union not long after this event: a.Lincoln read and established the Emancipation Proclamation b.the fighting at Fort Sumter in South Carolina c.The Battle of Gettysburg was lost by the South d.the election of Abraham Lincoln 1. A or B? I ...
*January 21, 2015*

**Math**

thanks!
*January 6, 2015*

**Math**

You can buy one 10 pack of AAA batteries for $5.49 and get one battery free, or you can buy two 4 packs for $2.98. Which has the lower unit price per battery? please help and show me the steps, thank you
*January 6, 2015*