Saturday
June 25, 2016

Posts by jana

Total # Posts: 118

Math (pre-celc 12)
Given (f+g)(x)=10-3x and (f-g)(x)=5x-14) find f(x) and g(x). So I was told to do: (f+g)(f-g)=2f 2f=(10-3x)+(5x-14)=2x-4 f(x)=x-2 For g(x) I tried: -2g=(10-3x)+(5x-14)=2x-4 g(x)=-x+2 is that correct?
June 24, 2016

Math (pre-celc 12)
So, g-g=0 wouldn't that get me g(x)=0?
June 23, 2016

Math (pre-celc 12)
Given (f+g)(x)=10-3x and (f-g)(x)=5x-14, find f(x) and g(x). I'm not sure how to go about this.
June 23, 2016

English Check answers
I think you're right for all.
June 21, 2016

math
Not a question.
June 21, 2016

Math (pre-celc 12)
Thanks for typing that all out! It really helped.
June 21, 2016

Math (pre-celc 12)
A true false test has 15 questions. How many answer keys are possible of the answer to 6 of the questions is false and 9 are true? I think this is a permutation and not a combination because each answer key would be different depending on the order of which are true or false. ...
June 21, 2016

Math (pre-celc 12)
In how many ways can a school president, a vice-president, and secretary be chosen from 21 students? I'm not sure to find this answer since there is no order in which they are chosen.
June 20, 2016

Math (pre-celc 12)
BC Place has 16 gates. In how many ways can you enter and leave the stadium by any gate? I'm not sure if this this is a combination or a permutation. I think it's a permutation and my answer is 256 ways. Thanks for the help.
June 20, 2016

Physics (Normal force and static coefficient)
Oops, the units for gravity are incorrect, it should me m/s^2.
June 18, 2016

Physics (Normal force and static coefficient)
Calculate the normal force for a 2 kg object at rest on an inclined surface, α=42 degrees How much is the static coefficient of friction between the surface and the block ---- My work: N = mg*cos(θ) N = (2kg)(9.8n/m^2)cos(42) = 14.57 N F = µsN µs = F/N &...
June 18, 2016

Math (pre-celc 12)
I need to prove this identity: cot(x)+tan(x)=csc(x)sec(x) I get as adding them together, but then I get stuck.
June 17, 2016

Math (pre-celc 12)
Never mind I figured it out!
June 17, 2016

Math (pre-celc 12)
I'm not sure how to get the final answer for this question I get stuck halfway thru. Simplify using sum and difference identities: cos((3pi/2)-x) I think the answer is supposed to be -sin(x) Thanks!
June 17, 2016

math
Neither: 7+4+3=14 7+3=10 10/14 (or 5/7) marbles are not red so you have about a 71% chance of not getting a red marble
June 11, 2016

Math (pre-celc 12)
thanks!
June 11, 2016

Math (pre-celc 12)
I'm not sure how to solve this equation algebraically: 38=20sin((2pi(t))/36)+22 I know the answer should be about 5.3 since I graphed it. I can get as far as removing 22 from the right and then removing 20 from the right by dividing by 20. To get 0.8=sin((2pi(t))/36)
June 11, 2016

Math (pre-celc 12)
Thanks! Great explanation.
June 10, 2016

Math (pre-celc 12)
Write an expression for the x-values where the the maximum in the expression occurs: y=6cos((2pi/14)x)-2 I know that the maximum occurs every 14 units if you start at 0,0. I'm stuck after that.
June 10, 2016

Math (pre-celc 12)
thanks Bob :)
May 30, 2016

Math (pre-celc 12)
Write the expression as a single logarithm: 3log(a)-log(b)-(1/2)log(c) I want to check my answer. I got log(a^3/bc^(1/2))
May 30, 2016

Math (pre-celc 12)
Thanks. That really helped!
May 29, 2016

Math (pre-celc 12)
Find x: 2(5)^x=3^(x+1) I'm not sure what to do with the 2. I think I need to write the equation as log5^2x=log3^(x+1), but I don't know. Thanks
May 29, 2016

ALGEBRA
so (x+4)^2 is the same as (x+4)(x+4) Find the roots: x+4=0 x=-4
May 29, 2016

Math (pre-celc 12)
Thanks!
May 22, 2016

Math (pre-celc 12)
Factor 2x^4-62x^2+60x I get: 2x(x^3-31x+30) 2x(x-30)(x^2-1) 2x(x-30)(x-1)(x+1) But that's wrong. It should be (I think): 2x(x-1)(x-5)(x+6) Please show me where I went wrong.
May 22, 2016

English
I'd say "he is a unique and blessed person" unless you're writing as a character who would say it like that. It sounds more clear to me.
May 22, 2016

Math
area=Length x width so, what are the factors of 42?
May 17, 2016

Math (pre-celc 12)
Solve this algebraically for the exact values (Meaning find the x-intercepts): (1/x)=x/(3x+18) I'm not sure what to write as the common denominator. I thought it was: 4x+18 because (3x+x+18)=(4x+18), but I'm not sure what to do from there. Thanks!
May 17, 2016

Chemistry
1. Before the Industrial Revolution, the concentration of CO2 in Earth’s atmosphere was about 275 ppm. Considering the effect of CO2 only, calculate the effect that the increase in CO2 has had on the pH of precipitation
April 30, 2016

Trigonometry
If the terminal side of angle theta passes through point (-3, -4), what is the valuse of sec theta? 1) 5/3 2) -5/3 3)5/4 4)-5/4
April 17, 2016

math
I noticed that Ms. Sue. I must be getting tired, so I'm going to stop before I do something like that again.
March 30, 2016

math
IGNORE MY FIRST ANSWER 3/4 = 75%
March 30, 2016

math
3/4 = 25% = 0.25 25% of 160 = 160 x 0.25 Try it and see what you get.
March 30, 2016

math
remember, one is removed from the original total.
March 30, 2016

math
Hint: How many red socks are left after she removes one? How many socks are there in total?
March 30, 2016

algebra
Don't worry. Just remember you need to find x. You can't do that with x on both sides, right? It's in 5x and 4x. Get x to one side. Remove 5x from the right. Whatever you do to one side you do to the other. 4x-5x=-1x (do not remove x as it can be any number and is ...
March 30, 2016

algebra
PS: You don't need to start with the -9. You can start from either side. For example: you could have subtracted 2 from both sides to get -11. 5x-11=4x Then keep going
March 30, 2016

algebra
Step by step: You want the variable "x" on one side. first: Remove -9 from the right y adding 9 to each side to get: 5x + 11 = 4x Get the other term with "x" in it by subtracting 5. From both sides. Remember that 5x and 4 x are the same term because the ...
March 30, 2016

Math
you want H (aka height) Volume = length x width x height Volume/(Length x width) = height
March 30, 2016

Math
No, it's C D gives you the number for length and width multiplied together. Sorry Luis
March 30, 2016

Physics
Is there a question in there?
March 30, 2016

Science
Yes sir! Nice work.
March 30, 2016

Science
You asked this twice ;) Not even going to guess? Let me give you some hints: What variables are the same for each? B) does not address the variable They know what condensation is.
March 30, 2016

Science
Not even going to guess? Let me give you some hints: What variables are the same for each? B) does not address the variable They know what condensation is.
March 30, 2016

Science
Not even going to guess? Let me give you some hints: What variables are the same for each? B) does not address the variable They know what condensation is.
March 30, 2016

Math
Pi never ends and it never repeats a sequence.
March 30, 2016

Math
Zero. Pie is a food. Pi on the other hand has an infinite number of digets.
March 30, 2016

Biology
Wow, look how smart I am! I didn't even ask the question. We are learning about proteins and their structure, but one thing is confusing me. At what structural point is something considered a protein? Is a protein formed after two amino acids synthesis, or is a protein the...
March 30, 2016

Biology
I'm going as this question again as it seems to far down the list to be answered now. Sorry if this is considered spam.
March 30, 2016

science help
The second answer is correct. That is part of the reason it is so bad to kill coral reefs. No reef = no oxegen
March 30, 2016

Biology
Thanks! Great answer. :)
March 30, 2016

Biology
We are learning about proteins and their structure, but one thing is confusing me. At what structural point is something considered a protein? Is a protein formed after two amino acids synthesis, or is a protein the whole structure (all four levels) put together? I would think...
March 30, 2016

english
I'd say A too.
March 30, 2016

math
the normal line to the curve y=f(x)=2x^2 at a point in the first quadrant passes through the point (0,3/4). find an equation of this normal line
March 2, 2016

Calculus
Which of the following integrals cannot be evaluated using a simple substitution? the integral of the square root of the quantity x minus 1, dx the integral of the quotient of 1 and the square root of the quantity 1 minus x squared, dx the integral of the quotient of 1 and the...
February 19, 2016

math
R,O,C,A are the midpoints of the sides of the rhombus DJSB. if DJ= 16 sq rt of 2 cm and d=120 degrees, what is the perimeter of ROCA?
January 23, 2016

English
what is a minor transtion of a text?
June 24, 2015

English 9
I thought it was A but wasn't sure thoughts?
March 13, 2015

English 9
. Read the following line from Romeo’s monologue in Act II, Scene 2 of Romeo and Juliet, where Shakespeare employs personification: Arise, fair sun, and kill the envious moon, Who is already sick and pale with grief, That thou her maid art far more fair than she: Be not ...
March 13, 2015

Creative Title Help
What would be a creative title for an essay paper over the causes of wildfires?
October 12, 2014

DENTAL ASSISTANT HELP PLEASE!!!!!!
As the administrative assistant, the clinical assistants have asked you to clarify this assignment. What should the administrative assistant and the dentist do to rectify this situation ?
August 7, 2014

Science 207
the hotter the more evaporation will happen but the colder the less evaporation will happen. Molecules move faster when the temperature is increased Molecules move slower when the temperature is decreased
May 26, 2014

English
For vocabulary workshop, Unit 11 # 19. Her ability to _______ the words and gestures of prominent Americans makes her an excellent comic impressionist. Is the answer: parody ???
March 2, 2014

Accounting
1. On July 1, 2010, Harris Co. issued 6,000 bonds at $1,000 each. The bonds paid interest semiannually at 5%. The bonds had a term of 20 years. At the time of issuance, the market rate of interest was 7%. Harris uses the effective interest rate method to amortize bond premium ...
December 27, 2013

science plz help right now!!!!
Arianna is right! Thanks so much, I could have missed 4 questions.
December 16, 2013

math
The ratio of apples to oranges at a fruit stand is 4 to 5. There are 60 oranges at the stand. How many apples are at the fruit stand?
November 21, 2013

Statistics
In a survey of 1233 people, 917 people said they voted in a recent presidential election. Voting records showed that 72% of eligible voters actually did vote. Given that 72% of eligible voters actually did vote, find the probability that among 1233 randomly selected voters, at...
June 15, 2013

Statistics
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 140 lb and 181 lb. The new population of pilots has normally distributed weights with a mean of 146 lb and a standard deviation of 28.9 lb. A) If a pilot is ...
June 15, 2013

Statistics
In a genetics experiment on peas, one sample of offspring contained 421 green peas and 166 yellow peas. Based on these results, estimate the probability of getting an offspring pea that is green. Is the result reasonably close to the value of 3/4 that was expected ?
June 13, 2013

Statistics
The probability of a randomly selected car crashing during a year in a certain country is .0479. If a family has three cars, find the probability that at least one of them has a car crash during a year.
June 13, 2013

statistics
Sorry, forgot the last line - Find the probability that not enough seats will be available.
June 12, 2013

statistics
An airline has a policy of booking as many as 17 persons on an airplane that can seat only 16. (Past studies have shown that only 89% of the booked passengers actually arrive for a flight.) Find the probability that if an airline books 17 persons, not enough seats will be ...
June 12, 2013

Statistics
How do I figure out the answer to this ? It's been a while since I came across one like it; On a test, 6.25% of the questions are answered incorrectly. If 5 questions are answered incorrectly, how many questions are on the test ?
May 25, 2013

math
third one is 0.55
May 19, 2013

math 5th
a rectangle playground has an area of 3,450 square meters. if the width of the rectangle is 35meters.find the length?
February 12, 2013

AP Chemistry
0.015 moles of a compound are dissolved in 18 fl. oz. of water. At what temperature will the solution begin to freeze? The density of water is 1.00g/mL
February 10, 2013

chemistry
CaCO3(s)+2HCl(aq)-->CaCl2(aq)+H2O(l)+CO2 (g) How many grams of calcium chloride will be produced when 31g of calcium carbonate are combined with 11 g of HCl? I have 0.3097 moles of CaCO3 and 0.30169 moles of HCl...I get stuck at that point
January 17, 2013

Chemistry
calculate the wavelength in nm of the spectral line produced when an electron in an hydrogen atom undergoes the transition from n=3 to n=2. I get 6.56x10^-7 meters and 6,561.68 nm but that is not the right answer...help please!
January 14, 2013

Physical Science Need Help Please!
A light beam has a frequency of 5 x 1015 Hz. What is its wavelength?
November 13, 2012

english
life is full of choices, so i must learn to make good ones.life is a noun choices which other one
September 13, 2012

College
Another term that means the same thing as "insurance company" is:
June 19, 2012

Calculus
y=3+2ln|x|
February 10, 2012

Calculus
y=14x+3
February 10, 2012

science
What is the amount of water needed to obtain a saturated solution using 27g of barium nitrate? What mass of water is present
January 25, 2012

Math
A picture frame measure 5 inches wide and 7 inches long . What is the perimeter of the frame ? (16-3)
December 14, 2011

Mathematics
How can the number 39 be divided into two parts in order that the sum of 2/3 of one part and 3/4 of the other part is 28? Explain your workings
November 5, 2011

chemistry
calories given off when 89g of water cools from 44degrees C to 29 degrees C
September 14, 2011

8th grade science
No, loudness has no direction
March 23, 2011

business law
The U C C dose not apply in cases where both parties are merchants. True or False
March 5, 2011

English
haha
January 28, 2011

english
1. The young student (noun), who was new to (preposition) the school, wants (verb) to join the debating and (conjunction) fencing clubs, 2. I (pronoun) dream nightly (verb) to play the guitar (noun) in (preposition) the school (adjective) band. 3. The train (noun) that loudly...
January 13, 2011

com170
Write five sentences about the role of education in successful financial planning in the spaces on the following page. Correctly use a different verb tense in each sentence. Highlight each verb in yellow and identify the tense in parentheses. 1. Education "plays" (...
January 6, 2011

Statistics
If the standard deviation of a population is 56 and we want the standard error (the standard deviation of the sample mean) to be 14, then we need to take how many samples?
December 20, 2010

statistics
The average age of a vehicle registered in the U.S. is 8 years, or 96 months. If a random sample of 36 vehicles is selected, find the probability that the mean of their age is between 98 and 100 months. Assume the standard deviation for the population is 15. (sample mean)
December 20, 2010

spanish
It has to be C because the others are: a. It is not worth it b. what is hurting you c. what's wrong...
December 20, 2010

5th grade
how to convert improper fraction into mixed number or whole numbers
November 29, 2010

science
1.In a device like the one shown below, the cylinder is allowed to fall a distance of 300 m. As a result, the temperature of the water increases by 2.7°C. What would have been the increase in temperature if the cylinder were only allowed to fall 100 m
November 6, 2010

5th grade
what are two goals of the system used to classify organisms
August 25, 2010

8th grade physics
1. if you double the distance over which a force moves an object,the work will be multiplied by?? 2.if emily doubles her velocity.her kinetic energy will be? 3.the unit joule is equivalent to?
April 16, 2010

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