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Posts by brian

Total # Posts: 748

Math
the thirteenth term of an arythmeticprogression is 27. given that the seventh term equals to three times the second term, find: the first term nd the common difference of the progression

Life
Fill In My Blank Spaces

math
Sam has twice as many books as Jim. If Sam gives 12 books to Jim, they will have the same number of books. How many books to they have altogether?

Calculus
Suppose the integral from 2 to 6 of g of x, dx equals 12 and the integral from 5 to 6 of g of x, dx equals negative 3 , find the value of the integral from 2 to 5 of 3 times g of x, dx

Pre-Calculus
How do I solve the equation: 3 = 2.1 sin[(pi/6)t - 5pi/6] + 3.2

Math
If cscØ = 4/3, find sinØ + sinØ cot^2 Ø

Precalculus
Every point in the plane has exactly two polar coordinates. A)The statement is true because every point in the plane has a unique polar representation. B)The statement is false because left parenthesis r comma theta right parenthesis equals left parenthesis r comma theta plus ...

Precalculus
Find the magnitude and direction angle ? of the vector. u=4(cos102°i+sin102°j)

Physics
A ball with mass m=1kg and speed vo=5m/sec elastically collides with a stationary, identical ball (all resting on a frictionless surface so gravity is irrelevant). A student measures the top ball emerging from the collision at at speed vt=4m/sec at an angle ?t ? 37°. a) ...

History
Which adjective best describes Ming China’s position toward European trade? a.diplomatic b.equivalent c.inviting d.restrictive

Math
It takes Marty 1 1/4 hours to get ready for school. If 1/5 of that time is used to shower, what fraction of an hour does it take him to shower?

Social Studies
ive been using this cite for a long time and i just got expelled from my school for plagerism. f#$% this!

stats
If a student answers 40 multiple choice questions, each with four possible answers, by guessing randomly, the probability that she answers at least 15 correctly

Math
Place grouping symbols to make the equation true: 3x5-8+7-3/6=13

calculus
Cars on a certain roadway travel on a circular arc of radius r. In order not to rely on friction alone to over­ come the centrifugal force, the road is banked at an angle of magnitude 0 from the horizontal. The banking angle must satisfy the equation rg tan 0 = v^2 where v...

calculus
A patrol car is parked 50 feet from a long warehouse The light on the car turns at a rate of 30 revolutions per minute. How fast is the light beam moving along the wall when the beam makes the fol­ lowing angles with the line perpendicular from the light to the wall? (a)=...

calclus
A fish is reeled in at a rate of 1 foot per second from a bridge 15 feet above the water. At what rate is the angle between the line and the water changing when 25 feet of line is out? (Assume the fish stays near the surface of the water.)

Calclus
A point is moving along the graph of y = 1/(1 + x^2) so that dxldt = 2 centimeters per minute. Find dy/dt for the following values of x. (a) X = -2

calclus
A point is moving along the graph of y = 11(1+x2) so that dx/dt = 2 centimeters per minute. Find dy/dt for the following values of x. (a) X = -2 (b) X = 0 (c)X=2 (d)X=10

calculus
A point is moving along the graph of y = x2 so that dx/dt is 2 centimeters per minute. Find dy/dt when (a)x = 0 and (b)x = 3.

Calculus
All edges of a cube are expanding at the rate of 3 centimeters per second. How fast is the volume chang­ ing when each edge is (a) 1 centimeter and (b) 10 centimeters?

calculus
At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at the rate of 10 cubic feet per minute. The diameter of the base of the cone is approx­ imately three times the altitude. At what rate is the height of the pile changing when it is 15 feet ...

Calculus
A spherical balloon is inflated with gas at the rate of 20 cubic feet per minute. How fast is the radius of the balloon increasing at the instant the radius is (a) 1 foot and (b) 2 feet?

Math
The length of a rectangular board is 10 cm longer than its width. The width of the board is 26 cm. the board is cut into 9 equal pieces. What is the area of each piece? What are the possible dimensions of each piece?

Physics
If C⃗ = -5 i^ - 3 j^ - 4 k^, what is C⃗ × j^? If = -5 - 3 - 4 , what is × ?

US history
how did the Virginia colony survive with the help of the English colonists?

Geometry
A rectangular prism is measured 84 cm(l) x 42cm (w) x 56cm h. What is the largest size cube that fits the dimensions of the prism? Number of cubes required? Maximum length of the edge of the cube that fits 64cm, 42cm, and 56cm is _____cm. Number of cubes____

Math
simplify 10×10^4+2.8×10^6

Statistics
How do I answer: A normal distribution has a standard deviation equal to 39. What is the mean of this normal distribution if the probability of scoring above x = 209 is 0.0228

Algebra
I need some help on this math problem. 3c^2 - 5c - 7.8 = -2.2

math
does the bar around the x have anything to do with the problem.

math
im sorry the question is Write an integer for each expression: [x} if x = -12

math
can someone explain how to solve just not answer: IxI if x = 12 the I are a bar?

Math
On a 20 question math test, your teacher gives you five points for every correct answer and takes away one point for each incorrect answer. If you score 70 on the test, how many did you get correct?

Math
On a 20 question math test, your teacher gives you five points for every correct answer and takes away one point for each incorrect answer. If you score 70 on the test, how many did you get correct?

Geometry
Explain why knowing a combination of four pairs of equal sides or equal angles guarantees one of the congruence relationships.

Math- Geometry
Explain why knowing a combination of four pairs of equal sides or equal angles guarantees one of the congruence relationships.

Math
Prove that an exterior angle of a triangle is equal to the sum of the non adjacent interior angles of that triangle. Use the following variables in your proof. Exterior angle=w Interior adjacent angle= x Interior non adjacent angle1= y Interior non adjacent angle2= z

Math
A 2-digit number is twice the difference of its digits. What is the number?

Math
A 2-digit number is twice the difference of its digits. What is the number?

Math
Six apples cost as much as four pears. Each pear costs $4 more than each Apple. What is the cost of one pear?

Calculus
Evaluate as limit approaches 0. (Without using l'hopital's rule. ( Sqrt(4+sin(x))-2 ) / (3x)

Chemistry
Calculate the total amount of heat that must be added to convert 15.7g of ice at its melting point to steam at 100.0°C

Science
A transformer with 1890 turns in its primary coil has to decrease the voltage from 4620 V to 220 V for home use. How many turns should there be on the secondary coil?

Physical Science
A 20.0-Ù resistor and a 45.0-Ù resistor in parallel are connected to a 120-V dc source. (a) What is (are) the current(s) through the resistors? current through the 20.0-Ù resistor: Incorrect: Your answer is incorrect. . A current through the 45.0-Ù ...

English
Ms. Sue, it was A, you were wrong. I should have put what i thought.

English
Thanks, and is the second one A

English
Nine Haikus During a Drought In the dusty lane A frog waits for a puddle To fall from the sky Which form best describes this poem? A. limerick B. Haiku C. Concrete D. Narrative My choice is B. Haiku What about the poem best supports the answer to the previous question? A. It ...

science
A bullet of 29g is shot from a gun of mass 20kg with a muzzle velocity of 200ms if the bullet is 30cm long.determine. a)acceleration of the bullet b)the recoil velocity of the gun

physics
4. A gun’s bullet was launched horizontally with a speed 600m/s. It fell to the ground 300m away from the gun. a. How long was the bullets flight? b. At what height was the gun’s barrel at the moment of the shot? 5.

physical science
A golfer on a level fairway hits a ball at an angle of 38° to the horizontal that travels 85 yd before striking the ground. He then hits another ball from the same spot with the same speed, but at a different angle. This ball also travels 85 yd. At what angle was the ...

Chemistry
Given that ΔH (fusion) of water is 6025 J/mol, Cp,m(ice) = 37.7 J K–1 mol–1, and Cp,m(water,liquid) = 75.3 J K–1 mol–1, calculate ΔG (in J) for the freezing of 89 moles of water at 1 atm pressure and the constant temperature T = 14.4 °C. I got...

engineering science
calculate the work done required to push a car for 420 meters up an melon the force required to push the car is equal to 615n

chemistry
A sample of nitrogen has a volume of 50.0L at a pressure of 760mmHg. What is the volume of the gas at each of the following pressures if there is no change in temperature? A. 1500mmHg B. 4.00 atm C. 0.500atm

Math
$60

Math
Not sure how to solve 0.3x??

Math
How is that the ansswer. The discount was $18 it ask the original price of the coat with a 30% discount?

Math
Jane buys a coat that is $18 off the orinigal price. This is a 30% discount. What is the original price of the coat? Please explain how to get answer? Thanks

math
Don't get it I'm in 4th grade

math
Don't get it

math
No

math
Answer my question please

math
Taylor's home street address number has five digits. Two digits have values of 60,000 and 300.the last digit is 9.the value of each of the other digits is ten times the value of the digit on it's right. What's Taylor's home street address number.

math
Susie loves Starbucks coffe today,while waiting to place her order for her salted caramel macchiato , she noticed the prices for the three sizes that were available 12oz for $3.60 16oz for $4.96 20oz for $5.20 which size is the better unit rate

Math
Missing base 1/9= [. ] with exponent 2 please explain how I can get the answer thanks

Math
Missing exponent of 1/169=(1/13) please explain how I can find the missing exponent

English
Background Your favorite cousin has moved to your town and is looking for a job. Her previous experiences are working as a cashier and sales clerk at two department stores. You know she plans to apply at similar stores in your town. But you also know she is a perfect match for...

math
if i ran 1&5/8 mile and than later ran 9/10 of a mile what is the amount

math
Problem with your example is that the product of 4x5 is 20 then you would add the two zeros to complete the strategy giving the proper answer of 2000.

Chemistry
Apologies, the numbers corrected are: 40.0 ml of 2.50 M KOH to prep a solution that is 0.212 M

Chemistry
How many ml of water must be added to 40.0 ml of 2.50 m koh to prepare a solution that is 0.212 m?

Math
otto spent 3/4 of the money he had saved on a new video game. if the game cost $48, how much money did he have before he bought the game?

Southridge
What's the process if the input numbers are 1,2,3,4,5 and the output numbers are 2,5,10,17,26

Math
On a ruler that measures both metric and English units, we see that 1m=39.37 in. This implies that 2m = 78.74 in. Use this information to write an equation to convert x in. to y meters.

math
simplify: 5-(-3)^2 -6

nyonithwele
math: 38 learners at a high school,24play hockey,30play netball and 4play neither hockey nor netball.use venn diagram

Physics
Two charged particles have equal mass and carry charges of 2 nC and 3 nC respectively. They enter a magnetic field of strength 2 mT at the same velocity. Assuming that both particles exit the field parallel to each other and perpendicular to the field, determine the separation...

physics
the Apollo 10 spacecraft traveled at 11 km/s just prior o its re-entry, setting a speed record for humans. Suppose advanced technology raises the speed record by a factor of 100, to 1100 km/s. if a time travel of 1 hour elapsed on a ground-based clock, by how many seconds ...

Math
there are 600 fruits in a supermarket. If .64 are oranges and the rest are apples how many more oranges than apples are there

calc
I am having problem with the 1oo n. I know by taking the limit to the 1/n power gives me e in the denominator. How and what does (100n)^1/2n become?

calc
use the root test to to determine the convergence or divergence of the series 100n/e^n

algebra
bruh this girl says its wrong then doesn't put the right answer what the fffffff

math
1000ml x 15 gtt x 1 hr = 31 gtt 8hr ml 60 min How do you do this???

English
Dragonwings by Laurence yep What conflict is left unresolved at the end?

7th grade English
Both the authors of Zoos: Joys or Jails and the author of Why do we need Zoos : a. think animals should live in their natural habitat b.believe animals are protected in zoos c.wish people would make donations to zoos d. want to help wild animals, esp. endangered ones.

math
A 110lb woman is started on a nitroglycerin IV drip. The order is to administer the Nitro at mcg/min. The pharmacy sends a 250 ml IV container with 25 mg of nitro added to the container. What is the flow rate in ml/hr that the IV should run?

math
How many mls of 45% dextrose and 15% dextrose do you need to make 780 mls of 35% dextrose

math
How many mls of 55% Dextrsoe and water do you nee to make 980 mls of 27.5 Dextrose? No clue on what to do.

Algebra 2 Honors
You sure its not -3/81 = y/9? My answer came out as -1/3 and I solved in 2 different ways.

Algebra 2 Honors
Well, I'm having trouble on some of my homework questions and looking to get help as soon as possible on one of them about inverse variation. 1. If y varies inversely as x and y = -3 when x = 9, find y when x = 81. I will use the equation y = k/x but I have no idea how to ...

Physics
Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away in a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? Show proof of your answer through ...

Physics
Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other. The light waves are out of phase with each other. The light waves should pass ...

Algebra
It’s the end of the semester, and sisters Sarah and Chelsea are eager to head home for the summer. It’s a long drive, and Sarah’s old car can manage an average speed of only 55 miles per hour, so she leaves early in the morning. An hour later, Chelsea follows ...

Algbra
It’s the end of the semester, and sisters Sarah and Chelsea are eager to head home for the summer. It’s a long drive, and Sarah’s old car can manage an average speed of only 55 miles per hour, so she leaves early in the morning. An hour later, Chelsea follows ...

math
0.25 this website is a joke the answer was wrong

math
0.25

english
15. Identify the sentence in which the underlined pronoun is used incorrectly. There are only six days left in the school year. It will be fun to visit their house in the summer. Their just going to have to wait to see the movie. Greg refused to go there because of the bad ...

chemistry
first set 2.34*10-59= (5x)^5*(3x)^3(1x)^1 which is from the balanced equation. you will get 84375(x)^9=2.34*10-59= 8.67*10-8 mol/liter then you take the 502 grams/ mol and the 1 liter and multiple them all together to get 4.35*10^-5

Physics
A 1.42 kg ball is connected by means of two massless strings, each of length L = 1.29 m, to a vertical, rotating rod. The strings are tied to the rod with separation d = 1.29 m and are taut. The tension in the upper string is 48.0 N. What are (a) the tension in the lower ...

Chemistry
6Li(s) + N2(g) 2Li3N(s) a) What mass of lithium is required to produce 0.575 g of Li3N in the balanced reaction? b) What mass of nitrogen is required for the reaction? ------------------------------------------- I tried dimensional analysis in a couple different ways but I ...

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