# Posts by susan

Total # Posts: 997

**Multivariable calculus**

Hello, I have the next exercise about chain rule in multivariable calculus: I have to show that the differential equation: y(dz/dx)-x(dz/dy) = (y-x)z can be change to the equation: (dw/dv) = 0 using the new variables: u= (x^2)+(y^2) v = (1/x)+(1/y) w = ln(z)-(x+y) For that I ...

**Math**

Depreciation on a 2014 25 ft boat bought for $70,000 in latrine November 2014?

**science**

what measures the quantity of matter

**government**

Which event from The Odyssey best highlights the idea that the ancient Greeks greatly disliked greediness?

**chimestry**

A sample of carbon dioxide occupies a volume of 1.50L at 165kPa pressure. What pressure would the gas exert if the volume was increased to 2.5L?

**social studies**

Which event from The Odyssey best highlights the idea that the ancient Greeks greatly disliked greediness?

**algebra**

A custom tshirt company charges a 200.00 set up fee and 5.00 per tshirt. Approximately how many tshirts must be produced so that the total cost per tshirt is 5.33?

**Physical Science**

If Argon is 39.948, calculate average at kc mass of argon

**math**

Nico invests some money @ 5%, and $2400 less @4%. Investments total $165.00 in intrest in 1 yr. How much did he invest at each rate?

**Math**

How to solve | x + 1 | << 3 graphically? Ty

**Just checking Math-Absolute Value**

So then it would be |x+4|

**Just checking Math-Absolute Value**

The equation for "the distance from x to -4 is less than 12" is |x-4|<12? I'm just checking my answers.

**Trig/PreCalc**

An airplane is flying on a compass heading of 160 degrees at 425 mph. A wind is blowing with the bearing 200 degrees at 75 mph. Find the actual speed and direction of the airplane.

**math**

Randy finished the race in 28 minutes and 11.00 seconds. Julie finished 0.08 seconds faster than randy. Pat finished 0.1 seconds faster than Julie. How long did it take Pat to finish the race?

**Physics**

You build a loop-the-loop in your backyard. It has a diameter of 3.10 m. a) How fast will you have to be moving at the top of the loop to avoid falling off? The answer I got was 3.90 m/s. Is this correct? b)If you'll be coasting from the time you get to the bottom of the ...

**precalculus**

Use Demoivre's theorem to find the indicated power of the complex number. Write the result in standard form. 1.(3(cos5pi/4+i sin 5pi/4))^8 2.(3-3i)^6

**writing**

what is a good grabber for hammurabi law DBQ

**Math**

explain how to solve 2/7 + 12/35

**Math**

Explain how to do 2/7 + 12/35 ?

**Math, Precalc**

(3^x)+(5^{x+3})=(3^{x+4})-(1/3)*( 5^{x+2}). Solve

**Math**

4) The sum of an infinite geometric series is 100. The second term of the series is 24. Find two possibilities for a (the first term) and r (the common ratio). b. Given, 5 2 4 a a a 159 and 4 1 3 a a a 265 , find ...

**PreCalculus**

Um. sorry but it's not asking for the time.

**PreCalculus**

A tree grows vertically on a slope which has an incline of 27 degrees. When the sun is at an elevation of 78 degrees, the tree casts a shadow of 48 feet directly down the slope.

**Math**

24tenths - 1one 3 tenths

**history**

its A

**math**

You roll a die. If an odd number comes up, you lose. If you get a 6, you win $54. If it is an even number other than 6, you get to roll again. If you get a 6 the second time, you win $18. If not, you lose. (a) Construct a probability model for the amount you win at this game. ...

**math**

A true-false test consists of 15 items. (a) If Chris does not study at all and guesses each and every item in the test, describe the probability model for the number of correct guesses. each individual question has a probability of 1/2 of being correct so you want (1/2)(1/2...

**math**

A true-false test consists of 15 items. (a) If Chris does not study at all and guesses each and every item in the test, describe the probability model for the number of correct guesses. (b) What is the probability that Chris gets 80% or more for the test? Not sure how to do a...

**math**

A true-false test consists of 15 items. (b) What is the probability that Chris gets 80% or more for the test? (c) If it is a 25 item true-false test, would you think it is easier or more difficulty for Chris to get 80% or more? (Hint: please calculate the corresponding ...

**Business Law- Need Help with this one..**

It's c

**Math**

1 1/5 a ------ = ----- -6 3/7 4 1/6

**chemi**

A White Precipitate Of Zinc Oxide Was Formed

**Biology**

appendages

**Algebra**

A woman can bicycle 66 miles in the same time as it takes her to walk 24 miles. She can ride 7 mph faster than she can walk. How fast can she walk? Using r as your variable to represent the rate at which she walks, write an equation using the information as it is given above ...

**alg**

in the function f(x)=4(x^2-6x+ )+20 what number will complete the square

**help !! chemistry**

H2O(g) + Cl2(g) 2 HCl(g) + ½ O2(g) Heat of Reaction is WebAssign will check your answer for the correct number of significant figures. kJ Changed: Your submitted answer was incorrect. Your current answer has not been submitted. Information: COCl2(g) + H2O(g) CH2Cl2(l...

**chemistry**

How many joules of heat are removed to completely covert 80.0 grams of water to ice at zero Celcius? For water: c = 4.179 J/g °C Hfusion = 333.528J/g Hvap = 2258.601 J/g

**math**

The U-Drive Rent-A-Truck company plans to spend $8 million on 280 vehicles. Each commercial van will cost $25,000, each small truck $30,000, and each large truck $40,000. Past experience shows that they need twice as many vans as small trucks. How many of each type of vehicle ...

**chemistry**

Fluorine-20 has a half-life of 11.0 s. If a sample initially contains 49.0 μg of this isotope, how much remains after 66.0 s ?

**Technology in the classroom**

What is the ideal computer arrangement to use when you want to integrate computers directly into the classroom curriculum? A. One computer located in each classroom B. One computer that's shared among several classes C. A central computer lab, with one computer per student...

**Math**

Write an expression for this statement: Double 5, then add 63. I don't understand double 5. Does it mean 5 to the 2nd power or 5 +5?

**Math**

Can you help with a math word problem on rates and ratios

**stats**

It is a multiple choice exam with 12 problems, each problem has 5 options. You need to answer 10 correctly to pass, what is the probability that by guessing you will answer at least 10 problems correctly?

**plz check on math 6th grade**

The wheel of a unicycle has a radius of 14 inches how many minutes many rotations does it take for a will to travel 440 inches A.3 B.5*** C.8 D.10

**math 5th grade**

Samantha is making some floral arrangements. The table shows the prices for one-half dozen of each type of flower. Price for 1/2 dozen flowers rose : $5.29 Carnation : $3.59 Tulip $ 4.79 part A: Samantha wants to buy 6 roses, 4 carnations, and 8 tulips. She estimates that she ...

**Math**

1/8 then?

**Math**

Four friends share 1/2 of a pan of brownies. If each friend eats an equal portion, what fraction of the pan of brownies will each friend eat? Is the answer 1/4?

**Math**

subtract 70 with 7 x 3.

**Math**

70 devided by 10 = 7 7 is 1/10 of 70 multiply 7 by 3 and that's your answer.

**Math**

Sense the ratio is 1:2:5 and the 2nd ratio is 30 you devide 30 then multiply the new number by 5.

**Social Studies check my answers please**

lamp is correct! 100% correct! Just took the quiz and got a 100%

**psychology**

When researchers find similarities in development between very different cultures, what implications might such findings have for the nature-nurture issue?

**math**

50 + 1.15x = 2.50x solve x

**answer**

It makes a U shape.

**Chemistry**

How do I determine the value of the reaction 2HI(g) + 2.4 kcal --> H2(g) + i2(g) delta H = a) 2.4 kcal b) -2.4 kcal c) 0.00024 kcal d) -0.00024 kcal

**Chemistry**

How do I determine the value of the reaction 2HI(g) + 2.4 kcal --> H2(g) + i2(g) delta H = a) 2.4 kcal b) -2.4 kcal c) 0.00024 kcal d) -0.00024 kcal

**English**

Just looked it up and its A.

**Physics**

Sara dragged a 45N canoe for 36 seconds down the boardwalk. If Sara used 120 Watts of power, how long was the boardwalk?

**educational and tecnology**

b)a CD your friend bought that you borrowed

**Eco**

How do you think a nation’s output should be distributed according to income or according to some other standard (such as basic human need)?

**help**

what is the lim as x approaches 0 from the right of sin x

**help**

Econ? I do not need help with that. I need help with Math

**help**

WHERE ARE ALL THE TUTORS WHEN I NEED THEM

**Economics**

I don't understand it which is why Im asking for help but clearly you do not know how to help me.

**Math**

I need to create a picture on the computer and plot points using the x-axis and the y-axis. What program would I use to make this?

**music**

WHat is the second step in the process of composing a musical soundtrack?

**algebra**

I am the middle of 3 numbers whose total is 31. The largest is 3 more than 5 times the smallest. What # am I? 1st number I put as x 2nd number I put as y as long as y> x 3rd number is 3+5x=z X+y+z=31 so when I plug it in I get X+y+3+5x=31. Y=28-6x Now is where I get lost. ...

**Medievalism**

Hi, I need help finding a medieval object that still exist in the modern world.

**History**

I need a campaign poster for populist party

**Pre-Calc**

is there a way to upload a picture?

**Pre-Calc**

The CN Tower in Toronto, Canada, is the tallest free-standing structure in North America. A woman on the observation deck, 1150 ft above the ground, wants to determine the distance between two landmarks on the ground below. She observes that the angle formed by the lines of ...

**English**

1) it's either humorous or cold 2) slang

**Math**

26 animals tatal

**Math**

Parking in a student lot cost $2.00 for the first half hour and $1.75 for each hour thereafter. A partial hour is charged the same as a full hour. What is the longest time that a student can park in this lot for $8.00.

**Math**

The answer for this is a.-4,-1,2,5

**math**

Bridget ungrouped 5,000 as shown. 5,000-2896=. Use your understanding of place value to explain how the ungrouped number is equal to 5,000.

**Phyics**

A particle, which starts from rest, covers a distance of 19.94 cm in the first 8.6 seconds. Find the acceleration (in m/s2) of the particle at the end of 8.6 seconds.

**stats**

If a student scored 75 points on a test where the mean score was 83.5 and the standard deviation was 3.1. The student's z score is ________.

**Math**

Write each number is scientific notation. 291.7 0.0960 is it 2.917 x 10^ 3 and 9.60 x 10^-2? help!! thanks!!

**prealgebra**

10 points X 7 times = 70 points Additional 100 points = 100 points 70 points + 100 points = 170 points

**White Collar Crime**

Money for travel to different state where crime occured. Money to come back home. Drug testing while awaiting trial. Money for travel to go for trial by jury. Trial itself. Sentencing; then back home for a few months to get affairs in order. Money for travel to go to prison. ...

**PHI103**

All Whales are mammals. All mammals have hair or fur. Therefore, all whales have hair or fur. True or False: There is no conclusion in these propositions. True False Don’t worry, when I come back from my trip we’ll be more in love than ever. After all, absence makes...

**algebra (check my work)**

thanks

**algebra (check my work)**

60% of what number is 24? a/w = p/100 24/w = 60/100 24 * 100 = 60* w 2400 / 60 = 60w / 60 w = 40 am i correct?

**math**

x does not equal 7 because on list b 7/8 = 87.50% and therefore is greater than 33%

**math**

tell what whole number you can substitute for x in each list so the numbers are ordered from least to greatest. a. 2/x, x/22, 33% b. 1/x, x/8, 33%

**Math**

A rectangle has an area of 48 square yards. For what whole number values of length & width will the rectangle have the smallest perimeter?

**Math**

The areas of the rectangular faces of the box are shown( 90 in.², 60 in.², & 54 in.²). What is the volume of the box?

**Math**

The area of each unshaded rectangle is given (the areas given are ( 30 in.², 45 in.², 72 in.²)). What is the area of the shaded rectangle?

**Math**

For what whole number values of length and width will the rectangle have an area of 60 square yards and I'm perimeter of 38 yards?

**Math**

An airplane is at an altitude of 10 km. You spot the airplane at an angle of 55 degrees . How far away Is the airplane directly from you? Give your answer to the nearest kilometre.

**Math**

If a grasshopper jumped a vertical distance of 1.5 cm and horizontal distance of 8.0 cm,at what angle did it rise from the ground?

**Math**

A 6 m ladder is leaning against the wall of a house. The angle between the ladder and the ground is 68 degrees. How far away is the ladder from the wall.? How high up the house does the ladder reach ? Give your answers accurate to two decimal places.

**Math**

A 6 m ladder is leaning against the wall of a house The angle between the ladder and the ground Is 60 degrees . How far away is the ladder from the wall? How high up the house does the ladder reach? Give your answers accurate to two decimal places

**math**

Thanks for all your help everyone I hope you have all the answers you need for your questions.!!!!!!😀👍🏿👤

**math**

Terry, Corey, and Chris together made 20 baskets in a basketball game. Terry made 5 more than Corey. Chris made 3 times as many as Corey. How many baskets did they all have?

**science**

If I fire three arrows at 20 degrees, 40 degrees and 60 degrees, which arrow will go the farthest?

**math**

Find three mixed numbers so that the sum is 18 and the difference between the greatest number and the least number is 5 1/5.

**sociology**

what are subtopics for education

**sociology**

Talcott Parsons has suggested that with increasing institutional role specialization in modern societies, the family has taken on fewer functions” Based on your experience, apply this functionalist perspective to evaluate the main functions of a Caribbean family today.