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annonymous
Questions and answers by visitors named
annonymous
Questions (63)
if a=3x+2y and b=5x-4y, find x and y in terms of a and b
What I did: 2a=6x+4y +b=5x-4y --------- 2a+b=x 2(3x+2y)+(5x-4y)=x
4 answers
2,656 views
An expandable balloon contains 1400L of He at .950atm pressure and 18 degrees Celcius. At an altitude of 22 miles (temperature
3 answers
1,318 views
Computing in the Business World
Suppose you are opening a 1,000 square foot baseball card store in a shopping center. You have
4 answers
1,321 views
What is 5% of 85,000?
.05*85000=? 4,250
1 answer
371 views
Consider a solution containing 0.100M fluroide ions and 0.126M hydrogen fluroide. Calculate the concentration of fluoride ions
1 answer
685 views
Nitrosyl Bromide Decomposes according to:
2NOBr(g) <=> 2NO(g) + Br2(g) *<=> is an equilibrium arrow( 1 mole each of NO and BR2
1 answer
700 views
this is a question about how to write the reaction for mixing solid KOH with aqueous HCl...when i physically mixed the two there
3 answers
481 views
how do you make a guess and check table?
1 answer
353 views
flip a coin 3 times
a) what are the odds in favor of getting exactly 2 heads b) what are the odds against getting at most 1 tail
1 answer
444 views
what normal annual interst rate has an effective annual yield of 7.8% under continuous compounding?
4 answers
796 views
To culinary experts and to the average person the term “Extra Virgin” has a ring of exclusiveness and quality to it. When it
1 answer
389 views
To culinary experts and to the average person the term “Extra Virgin” has a ring of exclusiveness and quality to it. When it
1 answer
382 views
If 10. g AgNO3 is available, what volume of 0.25M AgNO3 solution can be prepared?
5 answers
3,679 views
a rengular prism is made of 1-centimeter cubes. the volume of the rectangular prism i 60 cubic centimeters. which set of
4 answers
1,683 views
A sample of methane gas, CH4 was collected over water at 25 degrees celcius and 720 torr. The volume of the wet gas is 2.50L.
1 answer
667 views
Draw the line structure for the compound: 2,5-dimethyl-3-hexane
I believe the compound is C8H16...i am not sure!! :(
1 answer
403 views
Draw the line structure for the compound: 2,5-dimethyl-3-hexane
I believe the compound is C8H16...i am not sure!! :(
3 answers
423 views
Considering that a researcher can test at the <p = .05 (95%), p = .01 (99%), or p = .001 (99.9%) level for statistical
1 answer
429 views
What is the chemical structure, its principle source, its legals uses (if any) and its relative addictiveness on scale 1-10 :
1 answer
342 views
What is the principle source of Caffeine?
I cannot find it at all!!
2 answers
509 views
if you find salicylic acid or acetic anhydride in your aspirin synthesis product why are they there? Where did they come from?
2 answers
565 views
Why would you find ethanol or water during an aspirin lab?
1 answer
365 views
Why would you find ethanol or water during an aspirin lab?
1 answer
395 views
what contaminant will be the one that most affects the pH of soap?
1 answer
349 views
What is the chemistry behind the “Breathalyzer” test. I'm supposed to explain the chemicals and structures involved with the
4 answers
780 views
one fluid ounce of liquid is approx. 1.73 cubic inches so how many cubic inches are there in 12 ounces.
4 answers
358 views
How tall would a glass (in the shape of a right circular cylinder)with a diameter of 3 inches need to be to hold 12 ounces.
3 answers
421 views
If you make a glass in the shape of a right circular cone (martini glass) how wide would the glass be if it is 4 inches tall and
1 answer
454 views
Choose a public figure who has acted unwisely. Describe if it was a lack of emotional intelligence, successful intelligence, or
1 answer
373 views
a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student
1 answer
655 views
a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student
2 answers
544 views
a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student
2 answers
730 views
What mass of ice would you have to add to water to get the same change in temperature as if you add 7.55 grams of dry ice to
1 answer
393 views
how do you get the percent of 1 over 12
1 answer
260 views
The final exam is worth 250 points. How many points do yu need on the exam to earn 93% of the total points ? What percent do yu
4 answers
684 views
On three tests you earned grades of 88%,94% and 90%. Each test was worth 150 points. The final exam is worth 250 pts. How many
1 answer
454 views
A merry-go-round (pictured) is sitting in a playground. It is free to rotate, but is currently stationary. You can model it as a
6 answers
758 views
If I wanted to become a cardiovascular surgeon, would I take pre-medicine for osteopathic?
5 answers
328 views
What id the difference between University of maryland college park and University of Maryland Baltimore?
I know they are at
2 answers
687 views
would the tone for "The Life You Save May Be Your Own" by Flannery O'Conner be selfish because Mr. Shiftlet wants the car only
4 answers
494 views
What is the tone in "The Bungrass Edge of the World" By Annie Proulx?
4 answers
499 views
A lever scale is balanced with a partially filled glass of water on one side. Will the balance be upset (and if so how?) if you
3 answers
569 views
A lever scale is balanced with a beaker filled of air on one side. The scale is very sensitive and can easily measure a change
4 answers
581 views
Hi can you check my topic sentences?
Antigone and Creon argue as she fights for the gods and he fights for his beliefs, resulting
3 answers
839 views
What is affirmative action?
2 answers
512 views
What is a quota system?
6 answers
451 views
Left side = right side check type of question.
x - (x + y)/2 = (x - y)/2 What I did was times the x in the left side by 2. I got:
3 answers
659 views
Question:
Find (3a+b)dot(2b-4a) if a=-i-3j+k and b=2i+4j-5k I did: =3(-1,-3,1)+(2,4,-5)dot 2(2,4,-5)-4(-1,-3,1)
4 answers
772 views
Find x, y, and z if
2(x,-1,4)-3(-4,y,6)-1/2(4,-2,z)=(0,0,0) What I did: (2x,-2,8)-(-12,3y,18)-(2,-1,1/2z)=(0,0,0)
1 answer
298 views
is (u dot v)dot (a dot c) a scalar quantity or vector quantity?
What's the difference? (I'm thinking scalar since it has no
4 answers
596 views
Why are some of these scalars and others are vectors? What's the difference and how can you tell?
1. a dot (b x c) 2. (a dot b) x
2 answers
703 views
Find a unit vector perpendicular to a=(4,-3,1) and b=(2,3,-1)
What I did: a x b = ((-3)(-1)-(3)(1), (1)(2)-(-1)(4), (4)(3) -
2 answers
487 views
Find two unit vectors each of which is perpendicular to vectors (1, 1, 0) and (1,0,1)
What I did: a x b = (1, -1, -1)
1 answer
500 views
Mike has 16 3/4 pounds of hamburger. How many 1/4 pound of burgers can he make.
1 answer
350 views
How do you multiply 16 3/4
1 answer
361 views
If Sally has $48 in her wallet and she spends $16 on a shirt. What fraction of the money did she spend on the shirt?
5 answers
442 views
Do you convert 16 3/4 to find out how many 1/4 pounds of hamburger you can make out of that?
1 answer
358 views
A 27 3/4 foot piece of rope will be cut into as many 2 1/2 foot pieces as possible. How many 2 1/2 foot pieces will there be and
1 answer
473 views
Susan spent 2/3 of her money on a shirt. If she has $12.25 left, how much did the shirt cost?
1 answer
432 views
which of the following are necessary to describe a rotation of a figure on a coordinate plane?
choose all that apply the center
10 answers
3,555 views
Point D(-3,5) is a vertex of triangle DEF. After rotation of the triangle about the origin D us located at (3,5). Which of the
5 answers
1,524 views
construct a probability distribution for18 boys and 24 girls
1 answer
351 views
Find the simplified form of each expression (-5)^-4
20 -625 -1 over 625 1 over 625
1 answer
84 views