# Posts by Mary

Total # Posts: 3,870

URGENT HELP WITH DISCRETE MATH PLEASE
1. for any sets X and Y, we define the symmetric difference X ∆Y by: X∆Y = (X - Y) ∪ (Y - X) = (X ∪ Y) - (X ∩ Y) Prove the following: -for all sets A,B and C, if A - (B ∩ C) = ∅ then A- C ⊆ B - for all sets A,B and C, if A ⊆...

URGENT! discrete math help please
1. for any sets X and Y, we define the symmetric difference X ∆Y by: X∆Y = (X - Y) ∪ (Y - X) = (X ∪ Y) - (X ∩ Y) Prove the following: -for all sets A,B and C, if A - (B ∩ C) = ∅ then A- C ⊆ B - for all sets A,B and C, if A ⊆...

math help
1. for any sets X and Y, we define the symmetric difference X ∆Y by: X∆Y = (X - Y) ∪ (Y - X) = (X ∪ Y) - (X ∩ Y) Prove the following: -for all sets A,B and C, if A - (B ∩ C) = ∅ then A- C ⊆ B - for all sets A,B and C, if A ⊆...

math
1. for any sets X and Y, we define the symmetric difference X ∆Y by: X∆Y = (X - Y) ∪ (Y - X) = (X ∪ Y) - (X ∩ Y) Prove the following: -for all sets A,B and C, if A - (B ∩ C) = ∅ then A- C ⊆ B - for all sets A,B and C, if A ⊆...

discrete math help please
1. for any sets X and Y, we define the symmetric difference X ∆Y by: X∆Y = (X - Y) ∪ (Y - X) = (X ∪ Y) - (X ∩ Y) Prove the following: -for all sets A,B and C, if A - (B ∩ C) = ∅ then A- C ⊆ B - for all sets A,B and C, if A ⊆...

math
1. for any sets X and Y, we define the symmetric difference X ∆Y by: X∆Y = (X - Y) ∪ (Y - X) = (X ∪ Y) - (X ∩ Y) Prove the following: -for all sets A,B and C, if A - (B ∩ C) = ∅ then A- C ⊆ B - for all sets A,B and C, if A ⊆...

Physics
Consider the earth following its nearly circular orbit (dashed curve) about the sun.(Figure 2) The earth has mass mearth=5.98×1024kg and the sun has mass msun=1.99×1030kg. They are separated, center to center, by r=93millionmiles=150millionkm. What is the size of ...

discrete math help please
1. for any sets X and Y, we define the symmetric difference X ∆Y by: X∆Y = (X - Y) ∪ (Y - X) = (X ∪ Y) - (X ∩ Y) Prove the following: -for all sets A,B and C, if A - (B ∩ C) = ∅ then A- C ⊆ B - for all sets A,B and C, if A ⊆...

6th grade social studies
the second one is: citan - a linen tunic or under garment. (is a vocabulary of Hebrew, arabic and persia) Good luck.

6th grade social studies
I am not sure but i think the first part is: djinnie - ( persian veil and tiara). The word Djinnie is an arabic word of persian origin. As soon as i figure out the other word, i will post the answer. Hope this helps.

accounting
Cash flow information: Direct and indirect methods The comparative year-end balance sheets of Sign Graphics, Inc., revealed the following activity in the company's current accounts:

math
Thanks

math
Two business partners, Ellen and Bob, invested money in their business at a ratio of 3 to 7. Bob invested the greater amount. The total amount invested was \$200. How much did each partner invest.

SCIENCE HELP ASAP! :)
#Nataly G is right. Everything smile more said is correct except for #5, it is c not d.

Geometry HELP HELP
Find the equation of a circle circumscribes a triangle determined by the line y= 0 , y= x and 2x+3y= 10 PLEASE HELP ME BELLS

chemistry
how many moles of vapor can be produced for 52 g of O2

GEOMETRY CIRCLES EQUATION
Find the equation of a circle circumscribes a triangle determined by the line y= 0 , y= x and 2x+3y= 10

Geometry Circles Equation
Find the equation of a circle circumscribes a triangle determined by the line y= 0 , y= x and 2x+3y= 10 I beg you

geometry circles equation i dont know
please he lp Find the equation of a circle circumscribes a triangle determined by the line y= 0 , y= x and 2x+3y= 10 this is my first timein this website please help me need it badly my teacher will be angry at me so much

help
how to post a link with jksha knowing ?

chemistry
A 25.0-ml sample of 1.00M KBr and a 75.0-ml are mixed. The solution is then heated to evaporate water until the total volume is 50.0 ml. What is the Molarity of the KBr in the final solution

math
1421/7=

Science
For anyone who is confused I promise you that the answers are C A D A A i got 100%. You can trust me.

math
which is the best estimate for (6.3x10-2) (9.9x10-3) written in scientific natation

PHYSICS
A proton, initially traveling in the +x-direction with a speed of 5.30×105m/s , enters a uniform electric field directed vertically upward. After traveling in this field for 4.38×10−7s , the proton’s velocity is directed 45 ∘ above the +x-axis. ...

Business law
Ashley sees a maintenance crew from Acme Co. beginning to resurface her driveway, a service she has not contracted for. Ashley thinks a new driveway would be good, so she doesn’t say anything. If Acme sues Ashley for the value of the resurfacing, (Points : 1) Ashley wins...

Social Studies
Omg.. yea. I got it right! Thanx

Social Studies
OH. Is it d then?

Social Studies
Which of the following was NOT true of the Battle of New Orleans? a. It was a decisive victory. b. It signaled a change in strategy for the British. c. It made future president Andrew Jackson a hero.* d. It was fought after the peace agreement between the Americans and the ...

Social Studies
Thanx a bunch Ms. Sue! :^D

Social Studies
Which battle convinced the British to stop fighting in America? a. Plattsburg* b. Tippecanoe c. Lake Erie d. Fort Mc.Henry

tech
2111740433

Math
Oh crap... Well, idk what is is then! :( Sorry

Math
Is that on a coordinate plane?

Math
I might no.. idk yet XD

More Language Arts
Thanks, Kitty! XD

More Language Arts
Identify what the sentence is: The bicycle path winds through the city *that is 40 miles long* a.Simple sentence b.Noun clause c.Misplace modifier* d.Adverbial clause

Language Arts
:D Thanx again!

Language Arts
Identify which sentence this is: The woman *who one the cookie competition* is my mother. Subordinate Clause Adjectival Clause Independent Clause Adverbial Clause I would say it's Subordinate.

college physics
Are you Daniel Spry?

EARTH SCIENCE
hey I'm from there

EARTH SCIENCE
Well, that's ridiculous... I'm sorry! But those answers would make sense..

EARTH SCIENCE
#1 is A #3 is D idk about #2

Language Arts
Thanx!!

Language Arts
Alright... umm. Is it A?

Language Arts
* Singing loudly in the shower* is what Jessica loves to do every morning. gerund phrase participial phrase appositive phrase prepositional phrase My answer is C.

Ms. Sue please help!!
To which sense does the phrase "staggering under the weight of their packs" appeal? 1.)Sound 2.)Smell 3.)Touch 4.)Sight* I saw somebody put "touch" but idk the answer.

intro to computers
what type of device is characteristic of an enterprise environment? a workstation used by a retired person. a workstation used at an engineering firm. a tablet computer used by an elementary school student a notebook used by a college student

algebra
I need to graph z= 3f^0 should I count 3 marks on the vertical line from zero?

math
Jamal buys 59 stickers. Stickers come in packs of 5 or 8. How many packs of 5 stickers does Jamal buy? 8 stickers?

science
I may have an idea I think it would be A.

Social Studies
What are some weaknesses of a gallus gladiator?

math
decimals to fraction 8 1/3 to the lowest terms

Calculus
correction its f(x)=(x^2)-1 not f(x)=(x^2)-a

Calculus
For what value of a is f(x)=(x^2)-a x<3 f(x)=2ax x(> or =)3 continuous at every x?

History
Lies, lies everywhere Cindy.... .-.

calculus
Y=2x^3-16x^2+64x+1

Biology
what would be a good starting sentence for a hypothesis "why do some people have similar dominant traits?"

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 ?

health care administration
Why is uniform benchmark measurement a challenge to healthcare

Pre Calculus
Find the exact value of sin(1/2arcsin(-7/25))

MATH
Find the exact value of sin(1/2arcsin(-7/25))

Math
Arnold started getting an allowance at his tenth birthday. Each month he got three times as many dollars as he was years old. If he saved 25% of his allowance, how much money would he have saved by the day before his 18th birthday? I got 972 but the way I did it was too ...

Math
Let S be the number of perfect squares among the integers from 1 to 20136. Let Q be the number of perfect cubes among the same integers. What is the relationship between S and Q?

Math
When 14 is divided by 5, the remainder is 4. When 14 is divided by a positive integer n, the remainder is 2. For how many different values of n is this possible. Is listing it out the only way?

Math
Arnold started getting an allowance at his tenth birthday. Each month he got three times as many dollars as he was years old. If he saved 25% of his allowance, how much money would he have saved by the day before his 18th birthday

Math
oh i see now?

health administration
Research at least three various methodologies for integrating QI strategies into performance measurements. Research at least three information technology applications—clinical decision support systems—as components of QI management. What am i supposed to do?

Psycology
. Which of the following is the MOST accurate conclusion one can draw about the mental health field?

Financial Accounting
After all events have been recorded, Lang's obligations to creditors represents what percent of total assets? a).record the events under an accounting equation b. After all events have been recorded, Lang's obligations to creditors represents what percent of total ...

Math - Linear Algebra
Let S be the plane defined by x−4y−3z = −18, and let T be the plane defined by −2x+8y+7z = 41. Find the vector equation for the line where S and T intersect. x 0 0 y = 0 + t0 z 0 0

Physics
i think that the mass of the fruit is 0.40 Kg instead of grams

Physics
m*g*h= potencial energy mass needs to be in kilograms g= 9.81 m/s^2 h in meters PE in J solve for h

Physics Classical Mechanics
A spherical non-rotating planet (with no atmosphere) has mass m1= 4 ×1024 kg and radius r1= 5000 km. A projectile of mass m2≪m1 is fired from the surface of the planet at a point A with a speed vA at an angle α=30∘ with respect to the radial direction. ...

Chemistry 2
Durango redox reaction the oxidation number of species Will decretase, increpase or stay the same

Chemistry
What volume of 5% vinegar solution is needed to neutralize 1.0g of baking soda if density is 1.01g/ml

Math
If you dive 17 feet below water, ascend 5 feet, descend another 16 feet what is the total distance you dove?

Geometry
If mAB = 324 feet, mBC = 103 feet, and mCD = 212 feet, what is the distance across the pond?

Principles of Accounting I - 29
The beginning capital of the business totals \$4,000. If the net income for the period totals \$14,000 and the withdrawals by the owner total \$3,000, what will be the new capital balance reported?

Geometry
The two vertices that form the base of an isosceles triangle are (-5, 3) and (2, 3). What are the coordinates of the other vertex?

Geometry
Three vertices of a kite are (6, 8), (9, 11), and (12, 8). What are the coordinates of the fourth vertex?

health care
Quality Improvement tools are the control chsrts or fishbone diagram. The quality measurement tools to measure things like patient falls would be like CMS or the Joint Comission. I do know if I am correct or not Thank You

Math:Calculating Investment
thank you! ,Steve

Math:Calculating Investment
thank you so much!

Math:Calculating Investment
How would I calculate this problem. plz help I don't know how to... An online store that has been successfully growing on its initial angel investment and revenues wants to invest \$5 million to expand the business. The bank is willing to lend the business this money at a ...

U.S. and Global Economics:Involving math
Just show me how to calculate it and I'll do the rest. I just don't understand how to calculate this problem. Thank you, An online store that has been successfully growing on its initial angel investment and revenues wants to invest \$5 million to expand the business. ...

Probability
help solving a probability problem: probability that a person taking a survey is male "given" that he preferred a European automobile if 112 males prefer european autos out of 188, and 216 of a total of 452 individuals were surveyed were male. Additional information...

Algebra 2 Trig - Probability Question
help solving a probability problem: probability that a person taking a survey is male "given" that he preferred a European automobile if 112 males prefer european autos out of 188, and 216 of a total of 452 individuals were surveyed were male. Additional information...

U.S. and Global Economics: Involving MATH
thx so much!!!!!

U.S. and Global Economics: Involving MATH
PLZZZ.. Help I just don't understand how to calculate this A landlord wants to acquire an additional apartment building for \$250,000. The new building contains eight apartment units, which will each rent for \$500 per month. The bank is willing to loan the landlord the ...

Math
You & a friend are at Paul & Elizabeth's Restaurant for a night of fine dining. You can choose among 2 appetizers, 4main dishes, & 3 desserts. Appetizer: soup or salad Main Dish: fish, chicken, beef, vegetarian Dessert: chocolate cake, apple pie, ice cream a: How many ...

U.S. and Global Economics
An online store that has been successfully growing on its initial angel investment and revenues wants to invest \$5 million to expand the business. The bank is willing to lend the business this money at a 10 percent interest rate over an eight-year term. Calculate the monthly ...

U.S. and Global Economics
thx so much!

U.S. and Global Economics
The owner of a flower shop needs a short-term loan to tide her business over until she completes the sale of some unused property. She asks the bank for a \$25,000 six-month loan. The bank agrees to give her the loan, but attaches a hefty interest rate of 18 percent. Calculate ...

U.S. and Global economics; involving math problems
I've been working on this problem for "hours" and I can't quite figure out how to solve it; can anyone help plzzz? I would appreciate it. :) Two college students went on spring break to Guadalajara, Mexico. One took the vacation in 2002, while the other went ...

geomertry
It means that person is allergic to that kind of fruit if he/she develops hives from it.

Science
it is now 8:59am but when the bell rings at 9:00am Suzete will be late for Science class. She must get from one side of school down three different hallways. She runs down the first a distance of 35.0 m at a speed of 3.50m/s. The second haallway is filled with students and she...

chemistry
How many grams of methanol, CH3OH, are there in 150.0 mL of a 0.30 M aqueous solution of methanol