Questions Asked on
February 12, 2018

Algebra
With a tail wind, a light plane can fly 720 km in 2h. Going against the wind, the plane can fly the same distance in 3 h. What are the wind speed and the air speed of the plane?
asked by Joshua 
Geometry
Quadrilateral ABCD is inscribed in a circle. Find the length of its shorter diagonal if AB=12, CD=18, arc BC=120, and arc AD =60°.
asked by bryan 
math
How could I solve c) and d) without the use of derivatives for the following question? It is estimated that, t years from now, the amount of waste accumulated, Q, in tonnes, will be Q(t)= 10^4(t^2+15t+70) tonnes, t is greater than or equal to 0, t is also
asked by kim 
science
Which of the following techniques are suitable for online, realtime filtering? Synchronized averaging Derivativebased filter Adaptive filter Moving average filter
asked by biomedical signal processing 
medical electronics
Which of the following equation defines Wiener filter in frequency domain (Sd and Sm represent the PSDs of desired signal and noise respectively) W(ω)=Sd(ω)Sd(ω)+Sm(ω) W(ω)=Sd(ω)+Sm(ω)Sm(ω) W(ω)=Sd(ω)−Sm(ω)Sm(ω) W(ω)=Sd(ω)Sd(ω)−Sm(ω)
asked by biomedical signal processing 
medical electronics
In steepest descent algorithm, step size controls which of the following? All of these Slope of error curve Stability Rate of convergence
asked by biomedical signal processing 
medical electronics
The range of step size in steepest descent algorithm is ∞
asked by biomedical signal processing 
medical electronics
In case of adaptive noise cancellation, the resulting error after convergence is Desired signal estimate None of these Zero Noise estimate
asked by biomedical signal processing 
medical electronics
If desired signal variance is increased, the output of Wiener filter Remains same Increases Decreases Becomes zero
asked by biomedical signal processing 
medical electronics
Autocorrelation matrix of input signal (noisecorrupted signal) x(n), Φxx is [Note: Φd and Φm are autocorrelation matrix of desired signal and noise, respectively] Φd∗Φm Φd+Φm Φd−Φm Φd/Φm
asked by biomedical signal processing 
medical electronics
ABCD lemma is used in recursive least squares to Reduce computations Real time processing Reuse past values All of these
asked by biomedical signal processing 
Probability
Four distinct fair of dice are rolled. What is the probability that the sum of the resulting numbers is at least 23?
asked by AJ 
physics
A sled and rider have a total mass of 58.4 kg. They are on a snowy hill accelerating at 0.4g. The coefficient of kinetic friction between the sled and the snow is 0.17. What is the angle of the hill's slope measured upward from the horizontal? You may find
asked by joy 
differential Equations
solve initial value problem t dy/dt = y + sqrt(t^2 + y^2) , y(1)=0
asked by George 
Maths
x=2cosøsinø and y=cosø3sinø then prove that 2x+y2xy=5
asked by Laksh 
Maths
How do you factorise x^4x^2y6y^2
asked by Fred 
CIRCUITS 2
Two relays each with 20 ohms resistance and 0.16 henry inductance are connected in series. What is the equivalent impedance?
asked by student 
chemistry
why is polystyrene cup use rather than a glass beaker to conduct exothermic or endothermic reaction?
asked by lassy 
Math
joe spent $27 for wallet and belts.walllet cost 2/7 as much as belt.How much wallet cost?
asked by Dhivakar 
Honors English 11 (PLEASE HELP!)
1. Recall that a participle is a verb form that is used as an adjective. A participial phrase is a participle with its modifiers and complements used as an adjective. Read the following sentence. Frosted with gooey icing, the cinnamon rolls were impossible
asked by typical failing sophomore 
Math
Find the complete factorization of the expression. 48x + 56xy I think it be d. A) 8x(6 + 7y) B) 8x(7 + 6y) C) 8xy(6 + 7) D) 8xy(13)
asked by Dolphin 
I would want to be an art tutor if that's availab?
May I be an art tutor here?
asked by Beautiful Galaxy Girl 
Math
Which expression is equivalent? 7 − 4(2x − 3) A) 8x + 5
asked by Dolphin 
science
water condenses onto the grass in the early morning when the air is clear because? A the air near the ground is warmer than the ground B the air near the ground cools to its dew point( I think this is the answer) C the relative humidity decreases D the
asked by Helpme i d not know these questions 
General chemistry
Ammonia fumes can permanently fog soft contact lenses. Briefly explain why students wearing soft contact lenses should be particularly careful when doing this experiment.
asked by Liv 
General chemistry
Briefly explain if wearing googles or other eye protection remove the hazard for these students.
asked by Liv 
Math
Please check my answers 1. Which ordered pair is a solution of y=x4? My answer is B (0, 3) 4.Which equation has (2,1) as a solution My answer is D y=2x+1
asked by COW 
History
Would protesting wearing a uniform for school fall under free speech?
asked by anonymous 
Physics
Two carts with the same mass are pushed together with a compressed spring between them. When the carts are let go, both move apart, from the spring force. Which will move with a higher speed? What will be the total momentum of the system be? Two cars, one
asked by Pedro 
Physics
A radioactive substance has a half life of 60s.what fraction of the original substance would you expect to exist after 180s.
asked by Riliwan 
General Chemistry
The formula of a compound of lead (Pb) and sulfur (S) was determined using the method in this module. A sample of Pb was weighed into a crucible and covered with finely powdered S. The crucible was covered and heated to allow the Pb and S to react.
asked by Liv 
Pre Algebra (8th)
Find the volume of the triangular prism. A triangular prism is shown. The front triangular face of the prism has a base measure of 12 feet and perpendicular height of 2 feet. The length of the prism between the triangular faces is 18 feet. A. 864 ft3 B.
asked by Derozen * TEC 
General chemistry
1) How high above the inner blue cone of the burner flame should the crucible be when the Mg is heated? 2) What should you do if you see white smoke rising from the crucible in the early stages of heating the Mg? 3) How will you know when the reaction
asked by Liv 
social studies
How do Canada's native people intend to preserve their culture? 1)by becoming independent nations 2)by moving away from reserves 3)by working with existing government 4)by using English on the street signs in their communities I think #1 Thank you
asked by Jamie 
Social Studies
What can be inferred by the passage of the black codes?
asked by Uhm, I have no friends and no one loves me 
physics
The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is 1/20 of an atmosphere. If a diver uses a snorkel for breathing, how far below the water can she swim? Assume the diver is
asked by Dr.K 
Physics  Optics
How far from a 20mfocal length convex mirror must a 2m object be placed so that it has an: a) real image of 0.2m b) virtual image of 0.2m
asked by Lev 
S.S ( HELP !! QUICK !! )
what did Texas think of the MexicanAmerican war? I just need a website link or something like that! I'm so stuck on this question !!
asked by Hajime Hinata 
prealg portfolio
**SOB STORY INTRO** This portfolio is on percent predictions and I very literally have no idea how to do it. This is a 30% grade for me and I only have a 68% right now in PreAlg, (which is confusing because I usually get 90100% grades on my answers and
asked by Tazia 
physics
The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is 1/20 of an atmosphere. If a diver uses a snorkel for breathing, how far below the water can she swim? Assume the diver is
asked by Dr.B 
physics
The height of the Empire State building is 318.00 meters. A pebble is dropped from the top of the building, what is the stones velocity just before it strikes the ground?
asked by kay 
math
What is the sum of the measures of the angles of a regular decagon? What is the measure of each angle in the decagon? 1,620°; 162° 2,880°; 288° 1,440°; 144° none of these
asked by i will pay 
social studies
what negative impact did gold and silver mining have in the west? A. Tent cities near the mines fostered criminals as longterm residents B. ghost towns were left behind after the mines stopped producing. C. mining camps were sources of many contagious
asked by sally 
Social Studies
1.How has geography shaped the history of Arabia and Iraq? 2.Why did Muslims split into Shia and Sunni groups?
asked by Lucy 
English
I am currently reading Free Food For Millionaires by Min Jin Lee. I feel like its missing something. Should I put quotation marks around the title of the book?
asked by Clueless 
Chemistry
In this experiment 4.0g of ferrous ammonium sulfate is used. Assuming everything else is added in excess; calculate the theoretical yield of the iron complex. Work through the entire reaction sequence; do not simply assume the number of moles of limiting
asked by Simin 
math
Abbi invested $1,000 in a certificate of deposit with a simple interest rate of 4%. Find the interest earned in 8 years. Then find the total of principal plus interest.
asked by new 
Biology
Is 3am considered night or day?
asked by Clueless 
Math
Cosine of a basic angle of an isosceles triangle is 1⁄2, while its area equals 4√3 cm2. Find the lengths of the sides of this triangle.
asked by Mike 
Math
In a right triangle, one leg is 40 cm long and the hypotenuse is 104 cm long. Find the tangents of its acute angles.
asked by Mike 
Math
Tangent of an acute angle of a right triangle is 1⁄2. Area of the triangle is 25 m2. Find legs of this triangle.
asked by Mike 
Math
Tangent of an acute angle of a rhombus is 3⁄4, whereas its side is 10 cm long. Find an area of the rhombus.
asked by Mike 
math
Jim ran 2/3 of a 5k race, then walked the rest. How far did walk? How do I set this problem up?
asked by penny 
biology a
Read the scenario. A cell contains 90% water and 10% salt. The external solution contains 75% water and 25% salt. Which statement is correct? A>> The external solution is hypotonic, so the cell will shrink B>> The external solution is hupotonic, so the
asked by Rylee 
Discrete Mathematics
If two light bulbs are choosen at random from 5 bulbs of which 3 are defective then which of the following in the probability that none in defective? 1/10 2/10 2/7 2/8
asked by Learner 
biology A
Complete the analogy below by selecting the correct answer. electron transport chain : _____ production :: Calvin cycle : _____ production A>> ATP; glucose B>> Water; glucose C>> ATP; oxygen D>> Glucose; ATP I'm pretty set on A, but, again, I'm not one
asked by Rylee 
Science
How does a geneticist use pedigrees? A. to create genetic crosses. B. To replicate identical strings of DNA C. To prove that sexlinked traits are caused by codominant alleles D. To trace the inheritances of traits in humans
asked by HELP 
science
t is time to summarize your research by creating a Microsoft® PowerPoint presentation or by writing a Microsoft® Word essay about the four landforms you chose to research and complete the Landform Portfolio assessment.
asked by Lisa 
math
A sequence is given by the rule n12, where n represents the term in the sequence. What is the 17th term in this sequence?
asked by milli 
math
Which measurement is equivalent to the amount of flour needed for one loaf of bread? A .05 B 5,000 C 50,000 D 500,000 A bag of flour weighs 2.5 kilograms. If 1 bag makes 5 loaves of bread, how many grams of flour are needed for each loaf? USE THIS TO
asked by connxus kid 
physics
Determine the x and y components of the following three vectors in the xy plane. 1) (a) A 14m displacement vector that makes an angle of 22° clockwise from the +y direction. x: 2) y: 3) (b) A 19m/s velocity vector that makes an angle of 40°
asked by katie 
biology a1
What substance diffuses across the membrane in osmosis? A>> glucose B>> ions C>> water D>> amino acids I'm thinking A
asked by Rylee 
math
a candy dish contains 10 cinnamon drops 10 lemons and 10 peppermints. if two two pieces of candy are chosen at a random what is the probablity of getting a cinnamon drop first and then a peppermint?
asked by camroncolton 
Science
Moonlight is really reflected sunlight. A. true B. false I think it is false am I correct
asked by PETER 
Statistics
Volunteers for a human performance study were randomly divided into two groups. The first group had their flexibility measured in the morning after a short meditation session while the second group had their flexibility measured in the afternoon with no
asked by Anonymous 
MATH
While she was travelling, Zaina took advantage of the convenience of cash withdrawals on her credit card since her Canadian debit card wasn’t accepted in the country she was in. According to her travel budget she withdrew $200 every day for food,
asked by PLEASE HELP ME/john do 
Calculus
Find if the sequence an = 5/(n+2) diverges or converges. I think it diverges because the limit as x approaches infinity does not exist.
asked by Anonymous 
physics
starting from rest,a 5.20 kg block slides 3.20 m down a rough 30 degrees incline. The coefficient of kinetic friction between the block and the incline is k=0.436. (a)determine the work done by the normal force
asked by tshimologo 
Health and Physical Education
Which of the following activities will best help you develop your ability to advocate for healthy activities? A. Use the DECIDE model to make decisions B. Communicate health advice to your family C. Develop a plan to achieve a longterm goal D. Search the
asked by Unknown 
math
While she was travelling, Zaina took advantage of the convenience of cash withdrawals on her credit card since her Canadian debit card wasn’t accepted in the country she was in. According to her travel budget she withdrew $200 every day for food,
asked by John needs help 
math
76 divided by ? = 10012 = What number should be placed in he box to make the statement true
asked by indira 
Chemistry Hess’s Law
This is not going to be formatted we’ll because there is no subscript here. H2 + 1/2 O2 —> H2O 286kJ N2O5 + H2O —> 2HNO3 77kJ 1/2N2 + 3/2 O2 + 1/2 H2 —> HNO3 174kJ Calculate the *Delta* H for 2N2 + 5O2 —> 2N2O5 I attempted this problem and
asked by Owen 
Math
Find the length of a line segment  CD with endpoint C at (3, 1) ad endpoint D at (5, 6). round your answer to the nearest tenth, if necessary. A. 9.4 B. 5.4 C. 3.6 ] D. 11.7 Find the midpoint of a segment FG with point F at (6, 4) and midpoint G at
asked by PLEASE HELP 
Health and Physical Education
1. The passing traits from parents to their children is a biological process called ______. A. Environment B. Gender C. Values D. Heredity **** 2. A ______________ is something a person works hard to accomplish. A. Consequence B. Decision C. Goal **** D.
asked by Unknown 
Science
Hi everyone, could somebody just check my answers?Say right and wrong, please do not give me answers, thanks. 1. Seahorses change color and swim together in predetermined ways before mating. These behaviors are called... A) asexual reproduction B) sexual
asked by YeahNah 
physics help please
Which has a greater resistivity? 1. A copper rod that is shaped like a rectangular prism with dimensions of 1cm x 1cm x 1000m 2. A copper rod that is shaped like a solid cylinder with diameter 1cm and length 1000m I think it should be the rectangular prism
asked by tyger2020 
English
CHECK MY ANSWERS, I NEED to 100% 1. Choose the word that best defines the italicized word. The rescue workers discovered the dog (cowering) in the closet. A  barking B  cringing (my answer) C  dying D  sleeping 2. Read these lines from Robert Burn’s
asked by Keith 
math
Make a box and whisker plot of the data, Algebra final exam scores 88, 92, 60, 80, 97, 58, 81, 47, 83, 65, 72, 78, 90, 92, 94, 87, 80, 50, 60, 52
asked by Untitled 
math
53 divided by 3
asked by jules 
chem
If 6.64 moles of C5H12 reacts with excess O2, how many moles of CO2 will be produced in the following combustion reaction? Can plz explain how to do it Thank You
asked by rachel 
Biology A1
When particles move out of a cell through facilitated diffusion, the cell __________. A>> first gains and then uses energy B>> does not use energy C>> gains energy D>> uses energy I'm thinking it's A...
asked by Rylee 
Even more health...
1. The health continuum is a representation of where your current health says fallssomewhere between illness and wellness. Identify the health status that might cause a decline in health and move you toward a state of illness. A. Enthusiasm for life B.
asked by Unknown 
Math
Justin wants to evaluate 3cot(5pi/4). Which of the following identities can he use to help him? Select two answers. cot(theta) = cot(theta) cot(theta) = cot(theta) cot(theta) = cot(theta) cot(theta + pi) = cot(theta) cot(theta + 2pi) = cot(theta)
asked by Max 
New quick Q.
so... I've gotten more designs, and people around town are finding out about them... but I don't know how. People in this town are really big on cars, and they want to see the designs... does anyone have tips on getting stuff patented in like, a few
asked by Rylee 
SOCIAL STUDIES HELP PLEASE!!!
Can you guys please help me with this i don;t understand it plzz how did the supreme court decision in Worcester V.Georgia and the Indian removal act lead to the removal and resettlement of native Americans groups? Can you explain it to me or give a link
asked by that emo girl! 
Health Health Health
1. Which one of the activities would most likely be included in Healthy People 2020 goals? (1 point) A. Assist families in getting lowcost housing within the city that is known for high pollution levels. **** B. Help doctors to move their offices out of a
asked by Unknown 
Math
You are packing for a vacation. You pack 3 pairs of shorts, 5 shirts, and 2 pairs of shoes. How many different outfits will you be able to make using one pair of each clothing 10 17 30*** 35 I think it is 30.
asked by Apple juice 
math
f(x)= 3x^2 +12x + 2 when you complete the square, is it y= 3(x+2)^2  10
asked by tom 
Math
Hi there! I need help on this question. I am really confused. In a candy bar, 108 calories are from sugar. There are 240 calories in the candy bar. What percent of the calories are from sugar? A.60 B.45 C.58 D.42 I think it is B but I want to get a second
asked by Random Student 
Art
Which descriptive statement about cultural function applies to this image The link wouldn't work so Title: Amuletic brouch
asked by Ã¢Â�Â¤Food 
grade
How to figure out a grade 19 out of 25.
asked by Betty 
Math
Find the inverse function of y=g(x)=2x^3+1
asked by George Carl 
Math
A Ferris wheel has a diameter of 140 feet. There are 40 cars for riders, and they are placed at even intervals around the Ferris wheel. What is the best approximation of how many feet apart the cars are placed?
asked by Landon 
math
emma made a rectangular picture frame with a heigth of 25 5/6 inches. The frame is 5 2/3 inches wide. What is the hieght of the picture emma placed in the picture frame? explain how you found your answer?
asked by sarah 
art
If someone knows the context in which Edvard Munch’s The Scream was created, that person can conclude the artist was full of angst. What was Munch anxious about? the middle class German Expressionism abstraction modern life C?
asked by Bri 
math
you spend $16 on 3 notebooks and x binders. Notebooks cost $2 each and binders cost $5 each. Write an equation you can use to find the number of binders you bought.
asked by robin 
Algebra
1. What is the shape of the bases for the following polyhedron? A. Triangle B. Square C.rectangle D. Circle 2. What is the best name for the given solid figure? A. Rectangular pyramid B.rectangular cone C. Rectangular prism D. Rectangle 3. How many lateral
asked by Please help 
math
Write an equation for the following problem... you spend $16 on 3 notebooks and x binders. Notebooks cost $2 each and binders cost $5 each. Write an equation you can use to find the number of binders you bought.
asked by robin 
Science
1.scientists rely on which of the following to provide critical feedback when revising scientific explanations? A.null hypothesis B.dogma C.opinion D.peer review
asked by Sushan 
geography
What is more mountainous, northern or southern Europe? Northern?
asked by Anonymous 
Physics
Three point charges are fixed on the xaxis: 8.7×10^−6 C at x = −0.68 m, −3.0×10^−6 C at the origin, and 2.6×10^−6 C at x = 0.65 m. Find the electrostatic force acting on the charge at the origin due to the other two charges. Let a positive
asked by Anna 
AP Chemistry
I am honestly lost on this question and you can't proceed without solving the first on, so if anyone would be so inclines to help me out Aluminum metal reacts with zinc(II) ion in an aqueous solution by the following halfcell reactions: Al(s) → Al3+(aq)
asked by Damien 
LITTERATURE
How is a haiku and limerick poem alike, give 3 examples. I am not sure can u help me?
asked by Blackz 
history
The letter written by William Travis referencing the siege of the Alamo is an example of _? • a tertiary source • a secondary source • a primary source**** • an unbiased source
asked by Kayla 
Math
Mira has 20 gallons of water. She used 8 1/2 gallon to water the roses and 7 1/2 gallons to water lilies. How much water does she use have left?
asked by Carolyn 
history
The siege of the Alamo mission can be seen as a manifestation of which aspect of manifest destiny? • The need for a refuge for persecuted groups • The need to expand democracy • The need for new trade routes and markets*** • The need for new
asked by Kayla 
physics
A cannonball is shot (from ground level) with an initial horizontal velocity of 41 m/s and an initial vertical velocity of 22 m/s. 1) What is the speed of the cannonball 1.7 seconds after it was shot? 2) How high above the ground is the cannonball 1.7
asked by katie 
physics
Rewrite the following vectors in terms of their magnitude and angle (counterclockwise from the +x direction). 1) A displacement vector with an x component of +9.5 m and a y component of 9.6 m. magnitude: 2) angle: 3) A velocity vector with an x component
asked by amanda 
physics
A sled at rest is suddenly pulled in three horizontal directions at the same time, but it does not move. Paul pulls to the northeast with a force of 39 lb. Johnny pulls at an angle of 44° south of due west with a force of 68 lb. Connie pulls with a force
asked by olivia 
math
0.25x7/6=7/3 x=
asked by john 
history
The siege of the Alamo mission can be seen as a manifestation of which aspect of manifest destiny? • The need for a refuge for persecuted groups • The need for new trade routes and markets*** • The need for new opportunities to start a business
asked by Payton 
Math algebra
It say to find the area of the irregular shape and it's a semi circle with the diameter of 5 and a square measure 8 and I got the area of the rectantagle which is 40 and now I got to find the area of the semi circle but it say the radius for the formula
asked by Cats24 
Math
on tuesday evening randy spent 18 more minutes working on his math homework than he spent working on his philosophy readings. If he spent a total of 126 minutes on those two subjects then how much time did he spend on his math homework?
asked by David 
history
in the most basic terms, what is a tariff and what is it's purpose?
asked by tom 
Grammar
11.The physician started to perform the operation, but the patient was not yet completely under anesthesia. a)Started to b)Perform c)Was not d)Completely under 12)Before his death at age 82, comedian Rodney Dangerfieldâ€™s motto was, â€œI
asked by Anonymous 
math
13/611/15x=0.15 x=
asked by john 
math
7/x=12/14 x=
asked by john 
math
3/x=x/12 x=
asked by john 
math
5/9 divided by x=15/4 x=
asked by john 
math
13/611/15x=0.15 x=
asked by john 
chemistry
How can variation in hardness of water be determined in a laboratory? How is the using of sodium carbonate disadvantageous?
asked by ocelli 
math
(8.75−17/6) divided by 7.1+(9/2+8/3) divided by 43/10
asked by john 
math
(3/4 divided by 3/100  47/2) divided by 3/2 times 1/2 +7/6 =
asked by john 
math
3.72380952 divided by 4.16190476
asked by john 
math
0.492063492 divided by 226
asked by john 
Math
You sell instruments at a Caribbean music festival. You earn $326 by selling 12 sets of maracas, 6 sets of claves, and x djembe drums. Write an equation you can use to find the number of djembe drums you sold. An equation that you can use is ___ =326
asked by Stella 
math
you find a sales receipt from a store that shows the total price as $40, and the total amount paid including sales tax as $42. a. Write an equation you can use to find the sales tax rate r. b. Can you use r to find the percent for the sales tax?
asked by robin 
math
11 the 2 second power minus 7 times 6 minus 4 to the third power divided by 2
asked by Lulu 
physics
A sled and rider have a total mass of 58.4 kg. They are on a snowy hill accelerating at 0.4g. The coefficient of kinetic friction between the sled and the snow is 0.17. What is the angle of the hill's slope measured upward from the horizontal? You may find
asked by joy 
Matho
1. The temperatures in degree Fahrenheit at 4: 00 p.m. for a oneweek period in a certaincity are 47, 68, 58, 73, 42, 43, 68. How many days are of greater temperature than mean temperature ?
asked by Sunday November ho