Saturday

April 30, 2016
Total # Posts: 606

**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*

**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*

**Chemistry**

A sample of gas (2.0 mmol) effused through a pinhole in 5.0 s. It will take __________ s for the same amount of to effuse under the same conditions.
*December 31, 2014*

**Math**

NO /' I I HEAT YOU AND THIS
*December 11, 2014*

**Science**

Which of the following electromagnetic waves is not used for communication?
*November 23, 2014*

**Chemistry**

Consider the following reaction: 4NH3(g) +5O2(g) -->4NO(g) +6H2O(g) Suppose we have two flasks connected by a stopcock. In one flask, we have 2.0L of NH3(g) at a pressure of .500 atm. In the other flask, we have 1.00L of O2(g) at a pressure of 1.5atm. When the stopcock is ...
*October 29, 2014*

**Math**

A) P is approximately (0.883, 0.469), is a point on the unit circle with angle 28 degrees estimate the following. Sin 152 degrees = Cos 152 degrees = please help me step by step
*October 24, 2014*

**chemistry**

When 2016 J of heat energy is added to 49.5 g of ethanol, C2H6O, the temperature increases by 16.6 °C. Calculate the molar heat capacity of C2H6O. 49.5g = 2.98mols C=q/n*temperature change in Celsius 2016/2.98*16.6
*October 19, 2014*

**mathematic**

The local skateboard company reports that when they produce and sell n skateboards in a week, the cost is represented by the modelc=850+76n . The revenue is represented by the model r=150n. If both C and R are in dollars, write an equation for the profit from producing and ...
*September 30, 2014*

**physics**

A spacecraft is in orbit close to the moon's surface. The centripetal acceleration is 1.6 m/s^2. If the radius of the moon is about 1.7 x 10^6 m, determine: a)the orbital speed b)the period of the orbit
*September 27, 2014*

**Science(Stuff to do like with magnets!)**

Lorenzo is correct! Don't listen to @zaynmalik1d.
*September 15, 2014*

**science**

does kidney transplant always succesful
*July 24, 2014*

**Physics**

A 42.0 kg swimmer with an initial speed of 1.50 m/s decides to coast until she comes to rest. If she slows with constant acceleration and stops after coasting 2.00 m, what was the magnitude of the force exerted on her by the water?
*July 2, 2014*

**physics please help!!**

find the temperature of the hot reservoir of a carnot engine that has QH=1575j that does work on a 200kg crate, caussing it to go from rest to a velocity of 2.35m/s along the horizontal frictionless surface. Tc=100K
*June 26, 2014*

**math please help**

Limit as x approaches zero of (sinx-(x^3/6)/x^5)
*June 18, 2014*

**Maths**

For a) you just need to divide that amount of space each girl has by 100 and times it by the total area of the house they are renting. then you times the percentage you get by that cost of rent. eg: Laura = 20/100x50 = 40% = 40/100*900 = $360 For b) you calculate their food ...
*May 29, 2014*

**Maths**

Alison, Caitlin and Laura are sharing three bedroom two bathroom house at $900 rent per fortnight. Their weekly food bill is $210 per week and they save $50 per week for electricity and water. They share the rent based on the size of their bedroom and bathroom and share other ...
*May 29, 2014*

**ALGEBRA! URGENT. Check Answers!**

Thank you!
*May 27, 2014*

**ALGEBRA! URGENT. Check Answers!**

So number 1 and 2 are correct? and Number 3 would be changed to -2x^2 - 2x + 5
*May 27, 2014*

**ALGEBRA! URGENT. Check Answers!**

1. 18x^2 + 6 + 4x - 15x^2 - 4 + 13x Answer: 3x^2 + 17x + 2 2. 3x^2 + 6 - 2x + 5x - 4x^2 + 9 Answer: -x^2 + 3x + 15 3. 3x^2 + 5x - 7x + 3 - 5x^2 + 2 Answer: -2x^2 + 2x + 5 4. In the expression -7x - 3x^2 + 5. What is the coefficient of x? Answer: I think it's 7 or -7 Thanks!
*May 27, 2014*

**Math**

Thank you. I forgot the brackets
*May 9, 2014*

**Math**

What's the answer to 1^2-(2-x)^2=2^2-x^2 The answer said x =7/4 But no matter how I tried. I couldn't get that
*May 9, 2014*