# alexa

Popular questions and responses by alexa-
## geometry

What is the value of x? Justify each step. AC=32 2x 6x+8 .__________________._________________. A B C Drawing not to scale AB + BC = AC a.segment addition postulate 2x + 6x + 8 =32 b.substitution 8x + 8 = 32 c.simplification 8x = 24 d.addition property of

*asked on April 27, 2015* -
## physics

Which of :acceleration,age,speed,temperature,and velocity are vector quantities? Are any of them scalars?

*asked on June 14, 2011* -
## Geometry

Given: ΔАВС, m∠ACB = 90° m∠ACD = 30° AD = 8 cm. Find: CD, Perimeter of ΔABC plz add answer

*asked on February 25, 2017* -
## physics

The horizontal surface on which the block of mass 4 kg slides is frictionless. The force of 30N acts on the block in a horizontal direction and the force of 60N acts on the block at an angle. What is the magnitude of the resulting acceleration of the

*asked on July 12, 2011* -
## Calculus

An open box is formed from a piece of cardboard 12 inches square by cutting equal squares out of the corners and turning up the sides, find the dimensions of the largest box that can be made in this way.

*asked on April 28, 2016* -
## geometry

Write the conditional statement that the Venn diagram illustrates. The Venn diagram includes a large circle and it says quadrilateral and a small circle in it that says squares. Would this be the answer: If quadrilaterals are a four sided figure then in is

*asked on April 22, 2015* -
## physics

On planet x, an object weighs 10.4N. On planet B where the magnitude of the free fall acceleration is 1.48g (where g=9.8 m/s^2 is the gravitational acceleration on Earth),the object weighs 24.6N. The acceleration of gravity is 9.8 m/s^2. What is the mass

*asked on July 2, 2011* -
## Physics

A 50 kg skater at rest on a frictionless rink throws a 2 kg ball, giving the ball a velocity of 10 m/s. Which statement describes the skaters subsequent motion? Explain please. a. 0.4 m/s in the same direction as the ball. b. 0.4 m/s in the opposite

*asked on December 2, 2012* -
## physics

Consider a 626N weight held by two cables. The left hand cable had tension T and makes an angle of theta with the wall. The right hand cable had tension 720N and makes an angle of 27 degrees with the ceiling. What is the tesion T in the left hand cable

*asked on July 14, 2011* -
## physics

An artillery shell is fired at an angle of 48.2 degrees above the horizontal ground with an initial speed of 1530 m/s. THe acceleration of gravity is 9.8 m/s^2. Find the total time and flight of the shell,neglecting air resistance.Answer in units of

*asked on June 23, 2011* -
## Math

Lesson 13 : Using Graphs to Analyze Data Unit Test : Unit 3 On math unit tests, the questions are moved around and changed for each person, so if you could write out the whole answer, that would be great! You don’t have to do the writing questions. Thank

*asked on March 14, 2019* -
## Chemistry

A 0.700 g sample containing Ag2O and inert material is heated, causing the silver oxide to decompose according to the following equation: 2 Ag2O(s) → 4 Ag(s) + O2(g) If 13.8 mL of gas are collected over water at 27°C and 1.00 atm external pressure, what

*asked on October 8, 2014* -
## physics

A toy car is given a quick push so that it moves on an inclined ramp. After it is released, it moves up, reaches its highest point and moves back down again. Friction is so small it can be ignored. What net force acts on the car? A. net force of zero B.

*asked on July 2, 2011* -
## High School Geometry

In isosceles ΔABC, AC = BC, AB = 6 in, CD ⊥ AB , and CD =√ 3 in. Find the perimeter of the isosceles triangle. Can u plz put answer and equation thanks, :)

*asked on February 25, 2017* -
## Pre-Algebra

1) Find the surface area for a sphere with a radius of 10 feet. Round to the nearest whole number. a. 1,256 ft2 b. 4,189 ft2 c. 1,089 ft2 d. 1,568 ft2 2) Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. a. 1,257 ft3

*asked on March 13, 2013* -
## Geometry

An hourglass, composed of two identical cones, is 12 cm tall. The radius of each cone is 3 cm. If you want to fill the bottom half of the hourglass 2/3 full of salt, how much salt will you need? Explain the method you would use to find the amount of salt.

*asked on October 2, 2015* -
## Fluid Mechanics

The kinematic viscosity of oil of specific gravity .8 is .0005 .This oil is used for lubrication of shaft of diameter .4 m and rotates at 190 rpm. Calculate the power lost in the bearing for a sleeve length of 90mm. The thickness of the oil film is 1.5mm.

*asked on May 29, 2018* -
## Chemistry

how would you prepare pure dry crystals of potassium trioxonitrate?

*asked on April 13, 2016* -
## English

Which statement is false? A. Parentheticals aren’t crucial to the meaning of a sentence. B. Parentheticals are like asides. C. Parentheticals are crucial to the meaning of a sentence. D. Parentheticals are like comments. Is it C.?

*asked on November 2, 2016* -
## physics

A heavily loaded freight train moves with constant velocity. What is the relationship between the net force on the first car (F1) and the net force on the last car (F2)? A. F1=F2 B. F1>F2 C. F1

*asked on July 2, 2011* -
## physics

Sue and Jenny kick a soccer ball at exactly the same time.Sue's foot exerts a force of 62.3 N to the north. Jenny's foot exerts a force of 115.9 N to the east. What is the magnitude of the resultant force on the ball? Answer in N. What is the direction of

*asked on July 2, 2011* -
## Chemistry - Periodic Trends

For the isoelectronic series S2-, Cl-, Ar, K+, and Sc3+, which species requires the least energy to remove an outer electron? thanks They all have the same number of electrons (40) in the same shell arrangements, but S(2-) has the least nuclear charge.

*asked on April 21, 2007* -
## Geometry

4. Plots of land between two roads are laid out according to the boundaries shown. The boundaries between the two roads are parallel. What is the length of Plot 3 along Cheshire Road? 46 yards 67 yards 66 yards 37 yards

*asked on February 27, 2012* -
## physics

An elevator is being lifted up an elevator shaft at a constant speed by a steel cable. All fricional effects are negligible. In this situation,forces on the elevator are such that?: A.the upward force by the cable is greater than the downward force of

*asked on July 2, 2011* -
## English

Which of the following sentences contains an infinitive phrase? A. Racing through the park, she paused only to drink. B. Reading by flashlight does not cause bad vision. C. Mom’s idea was to pack the night before our early flight. D. Remembering every

*asked on September 16, 2015* -
## Chemistry

The homework question is : Calculate the Delta H for the following reaction: C6H6 + O2 -> C + H2O(l) State whether the reaction is exothermic or endothermic. I'm not sure where to go with this but so far I balanced out the formula to this C6H6 + (3/2)O2 ->

*asked on December 1, 2014* -
## History

What were the main conflicts between Native Americans and the US government during the time of westward expansion? I need a list of the various clashes between our government and the Native Americans roughly around the time of 1860-1910....i've found a

*asked on June 6, 2010* -
## Calculus

Find the area of the largest rectangle with sides parallel to the coordinate axes which can be inscribed in the area bounded by the two parabolas y=26-x^2 and y=x^2+2

*asked on April 29, 2016* -
## Multiple Choice HELP!

What is a counterexample for the conjecture? Conjecture: The product of two positive numbers is greater than the sum of the two numbers. A. 3 and 5 B. 2 and 2 C. A counterexample exists, but it is not shown above. D. There is no counterexample. The

*asked on March 20, 2014* -
## physics

A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 845 N. As the elevator moves up,the scale reading increases to 940N,then decreases back to 845N. The acceleration of gravity is 9.8 m/s^2. Find the

*asked on July 12, 2011* -
## physics

A locomotive pulls a series of wagons. Which is the correct analysis of the situation? A. because action always equals the reaction,the locomotive cannot pull the wagons,-the wagons pull backward just as hard as the locomotive pulls forward, so there is no

*asked on July 12, 2011* -
## Algebra II

An airplane leaves airport A and flies 200 km. At this time its bearing from Airport B, 250 km to the west, is 120 degrees. How far is the airplane from B?

*asked on May 17, 2010* -
## Mathematics

Brandon has a male puppy with a mass of 3 1/2 kilograms and a female puppy with a mass of 2 1/5 kilograms. How much greater is the male puppy’s mass than the female puppy’s?

*asked on May 27, 2020* -
## Physics 2

The temperature of a tungsten sample is raised while a copper zample is maintained at 20℃. At what temperature will the resistivity of the tungsten sample be four times that of the copper sample?

*asked on April 26, 2017* -
## math

Given: ΔKLM, KL = LM = 13in, KM = 10in. Find: The area of ΔKLM

*asked on February 25, 2017* -
## High School Geometry

The figures in (a) and (b) below are made up of semicircles and quarter circles; the figure in (c) shows a quarter of a circle in a square. Find the area and the perimeter of each figure in terms of Ï€. since I can't put a URL to the pic I will try to

*asked on February 23, 2017* -
## Literature

Which of the following sentences contains an action verb? A. Pahom's wife seems jealous of her sister. B. The Devil is happy about Pahom's boast. C. The grain dealer mentions the Bashkirs. D. Pahom becomes greedy for more land. I think its D??

*asked on October 8, 2014* -
## Algebra 2

A number cube is rolled 370 times and the results recorded as follows: there were 64 ones, 69 twos, 58 threes, 67 fours, 66 fives, and 46 sixes. What is the experimental probability of rolling an even number?

*asked on March 14, 2020* -
## math

If sina+7sinb=4 (sinc+2sind) and cosa+7cosb=4 (cosc+2cosd), how do I prove that 2cos(a-d) =7cos(b-c)?

*asked on June 13, 2017* -
## Math

In rod's family 3/4 of members wear glases. Of those who do not wear glasses, 1/3are male. What fraction of the family are males who do not wear glasses?

*asked on January 15, 2017* -
## Calculus

A particle travels along the parabola y=ax^2+x+b. At what point do its abscissa and ordinate change at the same rate?

*asked on May 2, 2016* -
## Algebra

Evaluate sqrt7x (sqrt x-7 sqrt7) Show your work. sqrt(7)*sqrt(x)-sqrt(7)*7*sqrt(7) sqrt(7*x)-7*sqrt(7*7) sqrt(7x)-7*sqrt(7^2) x*sqrt 7x-49*x ^^^ would this be my final answer?

*asked on February 17, 2016* -
## Chemistry

Calculate the volume of oxygen you would need, at 1.00 atm and 298 K, to completely oxidize 51g of glucose.

*asked on October 31, 2012* -
## Math

the short side of an isosceles triangle is 16cm long increasing each side length by 24cm doubles the perimeter. how long are the other sides of the original triangle?

*asked on January 24, 2012* -
## physics

An elevator starts from rest with a constant upward acceleration and moves 1m in the first 1.4 s. A passenger in the elevator is holding a 6.3 kg bundle at the end of a vertical chord. what is the tension in the chord as the elevator accelerates? The

*asked on July 3, 2011* -
## us history

What are some results of the Whiskey Rebellion?

*asked on January 11, 2011* -
## math... precalculus

how do i solve this equation? log3x+log3(x-24)=4

*asked on November 15, 2009* -
## chemistry

why would lowering the temp and decreasing the pressure not increase the rate of the reaction: carbon monoxide gas is combusted in the presence of oxygen gas into carbon dioxide. (DeltaH for this reaction is -285kJ.) CO + O2 ==> CO2 + heat decreasing P

*asked on April 29, 2007* -
## Business Management

1. A lower value of the U.S. dollar means that A. the American dollar is worth more when purchasing a foreign-made good. B. a dollar would be traded for less foreign currency than normal. C. the American dollar isn’t backed by gold. D. the dollar can’t

*asked on March 6, 2018* -
## High School Geometry

Given: ΔTSP, TS = SP = 10cm, TP = 12cm. Find: Three altitudes of ΔTSP. for this one I only got one of the altitudes 2 √61 can you give me the other two and tell me if this one is right, sorry I am in a rush

*asked on February 25, 2017* -
## Math

Chris had a tin of 24 cookies. He has eaten 1/4 of the cookies. How many cookies has he eaten?

*asked on January 12, 2017* -
## Calculus

A statue 10 feet high is standing on a base 13 feet high. If an observer's eye is 5 feet above the ground, how far should he stand from the base in order that the angle between his lines of sight to the top and bottom of the statue be a maximum?

*asked on May 11, 2016* -
## algebra

What are the vertex, axis of symmetry, maximum or minimum value, and range of y=-5(x+2)^2-8? please explain to me how you would solve this..I don't really understand. The answer is given.. The vertex is (-2, -8); the axis of symmetry is x= -2; k= -8 is the

*asked on February 1, 2016* -
## physics

Two 75.0 kg hockey players skating at 5.60 m/s collide and stick together. If the angle between their initial directions was 115°, what is their velocity after the collision? (Let the motion of player 1 be in the positive x-direction and the motion of

*asked on April 17, 2015* -
## Chemistry

Which of the following results from the presence of a solute in a given solvent? A. The vapor pressure of the solution is lower than that of the pure solvent. B. The boiling point of the solution is lower than that of the pure solvent. C. The freezing

*asked on May 22, 2014* -
## Chemistry

A sample of H2 is collected over water such that the combined hydrogen–water vapor sample is held at a pressure of 1 standard atmosphere. What is the partial pressure of the H2 if that of the water vapor is 2.5 kPa? A. 103.8 kPa B. 98.8 kPa C. 2.5 kPa D.

*asked on May 21, 2014* -
## calculus

Find an equation of the tangent line to the curve at (8,0). y=ln(x^2 -8x +1)

*asked on November 9, 2011* -
## chemistry

How many Moles of H are in 2.20 moles of H3PO4? and how do you figure that out? Thanks!

*asked on October 17, 2011* -
## physics

I have a question based off of the response to the question I posted below. Sorry, i wanted to make sure that i clearly understood,so My question about the third solution is: Is the horizontal force zero N? or is it 721.3N? A dragster and driver together

*asked on July 3, 2011* -
## chemistry

An atom has a valence shell configuration of ns2p5. To which group of elements in the periodic table does it belong? transition metals Halogens alkaline earth metals alkaline metal

*asked on December 1, 2010* -
## geometry

A careless person wrote, using the figure in the shape of a Y the the left ray is OA the right ray is OB and the straight ray is OC, the measure of angle AOB + the measure of angle BOC=measure of angle AOC. What part of the Angle Addition Postulate did

*asked on September 17, 2009* -
## chem-balancing acidic equation

the reaction: Cr2O7^-2(aq) + Cl- -> Cr^3+(aq) + Cl2(g) My balancing. Cr2O7^-2(aq)-> Cr^3+(aq) +Cr +7H2O +14H+ +6e- Cr2O7^-2(aq)+14H+ +6e- -> 2Cr^3+(aq)+7H2O Cl- -> Cl2(g) +Cl- +2e- 2Cl- -> Cl2 +2e- Cr2O7^-2(aq)+14H+ +6e- +2Cl- -> 2Cr^3+(aq)+7H2O +Cl2 +2e-

*asked on May 17, 2007* -
## chemistry

sulfur trioxide gas dissociates into sulfer dioxide gas and oxygen gas at 1250 degrees C. In an experiment, 3.6 moles of sulfur trioxide were placed into an evacuated 3.0-L flask. THe concentration of sulfur dioxide gas measured at equilibrium was found to

*asked on April 29, 2007* -
## Mathematics

Jenna bought a spool of ribbon for her craft projects. It contained 5 3/4 meters of ribbon. She used 3 2/5 meters of ribbon for a project.How many meters of ribbon does Jenna have left? Instructions: Put answer in simplest form.

*asked on May 27, 2020* -
## Social Studies

1. Which of these South Asian countries is an Islamic republic? A. Pakistan B. Bangladesh C. Sri Lanka D. Nepal I believe the answer is A but I want to make sure 2. Why are poverty levels high in much of South Asia? A. high populations and low economic

*asked on September 26, 2018* -
## science

what do you call a group of organs working together to perform a specific function?

*asked on November 6, 2017* -
## Physics 2

α of gold is 14.3x10^-6/C°. The density of gold is 19.3 g/cm^3 at 20℃. Determine its density at 140℃.

*asked on March 25, 2017* -
## chemistry

Hi, I'm doing a post-lab report and I have no idea how to solve this question. It asks which of the following molecules would be useful in quenching benzophenone photoreduction. it then lists oxygen (s1 = 22kcal/mol), 9,10-diphenylanthracene (t1=42

*asked on February 16, 2017* -
## Pre-Calculus

Your computer supply store sells two types of laser printers. The first type, A, has a cost of $86 and you make a $45 profit on each one. The second type, B, has a cost of $130 and you make a $35 profit on each one. You expect to sell at least 100 laser

*asked on June 8, 2016* -
## Calculus

A particle moves along the curve y=lnx so that its abscissa is increasing at a rate of 2 units per second. At what rate is the particle moving away from the origin as it passes through the point (1,e)?

*asked on May 12, 2016* -
## Algebra

Consider the leading term of the polynomial function. What is the end behavior of the graph? Describe the end behavior and provide the leading term. -3x5 + 9x4 + 5x3 + 3 how would I solve this?

*asked on February 17, 2016* -
## American History

“There cannot be a great vice president. A great man may occupy the office, but there is no way for him to become a great vice president because the office in itself is almost wholly unimportant.” —former Vice President John Nance Garner, Collier’s

*asked on December 17, 2015* -
## Math

A person who is 60in. tall casts a shadow that is 15in. long. How tall is a nearby tree that casts a shadow that is 40 in. long?

*asked on November 30, 2015* -
## AP chem

The experiment can be extended to determine the order of reaction m with respect to [OH-] by varying the concentration of hydroxide ions [OH-] Assume that the value of the pseudo-rate constant k’ was measured for two different concentrations of [OH-].

*asked on October 26, 2015* -
## Geometry

Jason designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric circles are each 1.25 m long. Find the total length of wrought iron used to make the structure. Round the answer to the nearest meter.

*asked on September 22, 2015* -
## math

Milky uses 192 beads to make a bracelet and a necklace.It takes 5 times as many beads to make a necklace than it does to make a bracelet.How many beads are used to make the necklace 192 divided by 5 is 38 and I got remainder of 2 but I don't know what I

*asked on February 11, 2015* -
## math

A tile is the basic unit that makes an entire floor pattern what fraction is white W ? Green G ? Yellow Y ? brown B ? BB B B B B G G B B Y Y Y Y B B W W W W W W B W W W W W W G G Y Y Y Y B B B B

*asked on February 2, 2015* -
## math

A tile is the basic unit that makes an entire floor pattern what fraction is white? Green? Yellow? brown?

*asked on February 2, 2015* -
## Physics

Block A of mass 2.0 kg and Block B of 8.0 kg are connected by a spring of spring constant 80 N/m and negligible mass. The system is being pulled to the right across a horizontal frictionless surface by a horizontal force of 4.0 N, with both blocks

*asked on November 14, 2012* -
## physics

A 2172.5 kg car is coasting along a level road at 34.7 m/s. A constant braking force is applied,such that the car is stopped in a distance of 50.5 m. What is the magnitude of the braking force? Answer in N. Here is my way, but im not sure if im correct:

*asked on July 2, 2011* -
## science-chemistry

what causes an acid-base reaction to occur? (hint: think about the products that form) I know salt and water form but I don't know why it happens...

*asked on October 1, 2009* -
## Math

If there are twelve 15 cent stamps in a dozen how many 12 cent stamps are there in a dozen

*asked on August 12, 2019* -
## social studies

what natural resources most attracted European traders to the lands that later became Canada?

*asked on March 20, 2019* -
## Health

Why would nicotine gum be helpful for a smoker trying to quit, since it contains the harmful drug? A. Gum contains such a low amount of nicotine the smoker can barely tell it is there. B. Chewing the gum takes the smoker’s mind off of cigarettes, which

*asked on June 6, 2018* -
## Math

Explain how the areas of a triangle and a parallelogram with the same base and height are related.

*asked on February 19, 2018* -
## Science

Diana is moving into a new apartment. She wants to get a heavy chair up to her second-floor apartment, but it will only fit through the window. Diana could strap the chair to her back and climb a ladder straight up to her window. Or Diane could use a

*asked on January 10, 2018* -
## English

Choose the letter of the word or phrase best matches the word in italics. The campfire was visible *glimmering* between the trees. Answers are Intermittently, Intermittently conspicuously Brightly Weakly I think it's weakly.

*asked on September 12, 2017* -
## accounting

A credit customer paid $850 toward his accounts receivable. The accountant recorded a credit to the revenue account. This error would cause __________. A. revenue to be understated B. cash to be overstated C. accounts receivable to be overstated D.

*asked on April 6, 2017* -
## High School Geometry

Given: ∆AKL, AK = 9 m∠K = 90o m∠A = 60 ° Find: The perimeter of ∆AKL The area of ∆AKL 1/ AK perpendicular to LK 2/AL is the third side plz add answer and solution

*asked on February 25, 2017* -
## math

Tonya's mother is 1.5 times as tall as Tonya was when she was 6. How tall is Tonya's mother? Use the correct number of significant digits.

*asked on September 13, 2016* -
## Pre-Calculus

The Fiedler family has up to $130,000 to invest. They decide that they want to have at least $40,000 invested in stable bonds yielding 5.5% and that no more than $60,000 should be invested in more volatile bonds yielding 11%. How much should they invest in

*asked on June 7, 2016* -
## Calculus

Air expands adiabatically in accordance with the law PV^1.4=Const. If at a given time the volume is 14 cubic feet and the pressure is 40 pounds per square inch, at what rate is the pressure changing when the volume is decreasing 1 cubic foot per second?

*asked on May 1, 2016* -
## Chemistry

Question: write the balanced equations for the titration of oxalic acid (C2H2O4) with KOH. Work so far: I know that the overall equation is COOH)2 + 2KOH ------.> (COOK)2 + 2H2O but I am unsure how to proceed to the two step-wise equations

*asked on April 9, 2016* -
## Algebra

Consider the leading term of the polynomial function. What is the end behavior of the graph? Describe the end behavior and provide the leading term. -3x5 + 9x4 + 5x3 + 3 how would I solve this?

*asked on February 17, 2016* -
## algebra

Let f(x) = -2x - 7 and g(x) = -4x + 3. Find (f o g)(-5) A. -9 B. 3 C. 23 D. -53 could you help me with this one? Would it be c?

*asked on February 9, 2016* -
## algebra

Let f(x) = -3x - 4 and g(x) = 2x - 6. Find (f o g) (-7) A. 28 B. -20 C. 17 D. 56 I think it'll be A?

*asked on February 9, 2016* -
## algebra

What is the equation of the given line in standard form? Use integer coefficients. y = -6.9x + 5.1 A. -69x + 10y = -51 B. 69x + 10y = 51 C. 69x + 10y = -51 D. -69x + 10y = 51 how would I solve it steph by step? I think the answer is C.

*asked on January 29, 2016* -
## Geometry

The equation (x + 5) + (y + 3) = 169 models the position and range of the source of a radio signal. Describe the position of the source and the range of the signals. ???? Would the answer be (5,3) is the center and 13 is the range of signals..??

*asked on October 2, 2015* -
## Calculus

An airplane is heading at a bearing of N23°E at a speed of 700 km/hr, but there is a wind blowing from the west at 60 km/hr. If the plane does not make any correction, what will be the bearing of the plane? What is its speed relative to the ground (ground

*asked on July 29, 2015* -
## sciencce

A dog breeder wanted to produce a small variety of cocker spaniel. He mated the smallest dogs from various litters for many generations. This is an example of

*asked on June 1, 2015*