Saturday
February 13, 2016

Posts by alexa

Total # Posts: 330

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?
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?
February 9, 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 maximum value; ...
February 1, 2016

algebra
its b
January 29, 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.
January 29, 2016

Physics
An object of mass m = 2.9 g and charge Q = +42 µC is attached to a string and placed in a uniform electric field that is inclined at an angle of 30.0° with the horizontal. The object is in static equilibrium when the string is horizontal. a) Find the magnitude of the...
January 21, 2016

Math
Oh okay! Thank you for the help! I think I understand now. Thank you!
January 17, 2016

Math
Thank you for the help, but I am confused on as to why you used 8 instead of 1/8? Is it because the whole pool is being filled or.. ?
January 17, 2016

Math
4/15 of a pool is filled every 1/8 of an hour. How much of the pool will be filled in one hour?
January 17, 2016

American History
yes please do give me your interpretation..
December 17, 2015

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 ...
December 17, 2015

American History
thank you
December 17, 2015

American History
The Department of Homeland Security protects the United States against terrorism. (a) List three of the five main services that it provides. (b) Why do you think the work of this department is so complex?
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?
November 30, 2015

Math
Johnny spent 4 2/3 for his exams studying for his math exams. He spent 3/4 of the time studying for math. How many hours did Johnny spend stydying for his exam? How do I show the number sentence?
November 2, 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-]. The value of k’...
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. Show your work. The ...
October 2, 2015

Geometry
75.40 cm^3 would that be the final answer?
October 2, 2015

Geometry
1/3 (pi *r^2)(h) ?
October 2, 2015

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. How would I solve this?
October 2, 2015

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..??
October 2, 2015

Geometry
2π * 7 * 45 = 630π = 1978.2cm^2 then would that be my final answer?
October 2, 2015

Geometry
Janine wants to paint just the sides of a cylindrical pottery vase that has a height of 45 cm and a diameter of16. Janine wants to paint just the sides of a cylindrical pottery vase that has a height of 45 cm and a diameter of 14 cm. To the nearest whole number, find the ...
October 2, 2015

Help me! Geometry
A design on the surface of a balloon is 5 cm wide when the balloon holds 71 cm^3 of air. How much air does the balloon hold when the design is 10 cm wide? Explain the method you use to find the amount of air. How would I solve this step by step?
September 28, 2015

Calculus
Thank you so much!
September 27, 2015

Calculus
Consider the line through the points (3,2,5) and (1,1,1). Consider the plane A that is perpendicular to this line, and passing through the point (-1,0,2). Consider the plane B that passes through the points (1,-1,0), (0,2,0), and (0,5,2). Consider the intersection of plane A ...
September 27, 2015

Calculus
Consider the line through the points (3,2,5) and (1,1,1). Consider the plane A that is perpendicular to this line, and passing through the point (-1,0,2). Consider the plane B that passes through the points (1,-1,0), (0,2,0), and (0,5,2). Consider the intersection of plane A ...
September 27, 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. Show your work. How ...
September 22, 2015

English
Thank you darling!
September 16, 2015

English
Which sentence has no direct object? A. Read me those directions again, please. B. Can you return this book by tomorrow? C. I just told Janice to call me tonight. D. Hank spoke to the audience for an hour. I think D..
September 16, 2015

English
What is the prepositional phrase in this sentence, and what does it modify? The purpose of the last song was to show off all the musicians’ talents. A. of the last song; an adjective phrase that modifies the noun purpose B. to show off all the musicians’ talents; an ...
September 16, 2015

English
Coyote hid himself and watched the Beings from a distance. He noticed that for a short time when they changed guardians of the fire, it remained unguarded. When the moment was right, Coyote snatched up a flaming piece of fire and raced away, the furious Beings just behind him...
September 16, 2015

English
So it would be D?
September 16, 2015

English
What is the infinitive phrase in this sentence? In August, we went to Ontario and to upstate New York to see Niagara Falls. A. to Ontario B. to upstate New York C. to see D. to see Niagara Falls I think its C
September 16, 2015

English
I was thinking that too.Thank you
September 16, 2015

English
What is the most likely reason that Shakespeare would include a scene in a tragedy that focuses on a minor character who uses a commoner’s dialect and falls over everything? A. to show that he is democratic B. to promote a social cause C. to poke fun at an unpopular ...
September 16, 2015

English
Thank you
September 16, 2015

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 opinion in the text ...
September 16, 2015

Math
If I post is put every 6 feet along the fence that is rectangular and nuts 42 feet long and 36 foot wide how many posts do I need
September 10, 2015

math
a chemist wants to create a solution that is 36% acid. How many liters of a 60% acid solution must be added to 30 liters of a 15% acid solution to obtain this 36% acid mixture?
September 9, 2015

Math
Suppose x is an angle in the second quadrant such that cosx=-8/17, what is the value of tan(3x/2)?
July 31, 2015

Math
Please help with math question below: Express the triple angle formula of tangent (i.e. tan〖(3x)〗) in terms of tanx.
July 31, 2015

Math
Can you explain more Sunny?
July 31, 2015

Math
Suppose a function f(x) has domain (-1,1). Find the domains of f((x+1)/(x-1))
July 31, 2015

trig
If sinx=3 cosx, then what is sinx∙cosx?
July 30, 2015

Math
You are given triangle ABC. AB=13,BC=15, and CA=14. Point D is on segment BC and CD=6. Point E is on segment BC such that CE>CD and ∠BAE=∠CAD. What is the length of BE?
July 30, 2015

geometry
I'm sorry, should be geometry (math)
July 30, 2015

Math
How many values of x satisfy the equation: sin⁡x=x^2/(625π^2 )?
July 30, 2015

Math
A pirate is on a hill looking at a building. The building is 400 feet tall. The angle of elevation from the pirate to the building is 4° and the angle of depression from the pirate to the bottom of the building is 2°. What is the shortest distance the pirate will need ...
July 30, 2015

Trig
Write an algebraic expression for the following: sin⁡(arctan⁡〖(x+1)/(x-1)〗 )
July 30, 2015

Trig
Prove the identity: (sin⁡(2x-y)+sin⁡y)/(cos⁡(2x-y)+cos⁡y )=tan⁡x
July 30, 2015

Math
A weight of 150 lbs is placed on a smooth plane inclined at an angle of 24° with the horizontal. What is the required force needed to prevent the weight from sliding down the plane?
July 30, 2015

trig
But still not sure how you come up with this formula (a+b)^2 ?
July 29, 2015

trig
Thanks Steve, but how do you get to this step? (a+b)^2 = a^2+2ab+b^2 = 8+32 = 40
July 29, 2015

trig
The hypotenuse of a right triangle has length 8. The area of the triangle is also 8 units squared. What is the perimeter of the triangle?
July 29, 2015

Calculus
Can you explain how to get these from here: 700 @ N23°E = (273.51,644.35) (333.51,644.35) = 725.55 @ N27.36°E
July 29, 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 speed = airspeed...
July 29, 2015

Algebra
6700000
June 24, 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
June 1, 2015

Geometry
thank you so much!
May 12, 2015

Geometry
Use the Distance Formula and the x-axis of the coordinate plane. Show why the distance between two points on a number line (the x-axis) is | a – b |, where a and b are the x-coordinates of the points. How would I solve this?
May 12, 2015

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 equality x = 3 e....
April 27, 2015

geometry
2x 6x + 8 .__________.__________. A B C this is a more accurate scale drawing
April 27, 2015

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 equality x = 3 e....
April 27, 2015

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 a square?
April 22, 2015

physics
A honeybee with a mass of 0.175 g lands on one end of a popsicle stick (Active Example 9-2). After sitting at rest for a moment, the bee runs toward the other end with a velocity 1.75 cm/s relative to the still water. What is the speed of the 5.00 g stick relative to the water...
April 17, 2015

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 player 2 be at an ...
April 17, 2015

physics
To balance a 29.8 kg automobile tire and wheel, a mechanic must place a 58.2 g lead weight 25.0 cm from the center of the wheel. When the wheel is balanced, its center of mass is exactly at the center of the wheel. How far from the center of the wheel was its center of mass ...
April 17, 2015

Geometry
A tire leaves a track of fresh snow. The area of the track is 250 square feet. How many turns does the tire make?
March 19, 2015

English
What is a great way to start a compare and contrast essay about honor? I want to compare Julius Caesar and Abraham Lincoln, the two great honorable men of our history.
February 23, 2015

English
Essay: Honor Introduction/Topic sentence: Courage, strength, and dignity is a very hard goal to achieve and to accomplish in ones life. Many have not succeeded in such a gift in their life but they took it for granted. How can you fix these two sentences or are they correct as...
February 23, 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 did wrong.did I do ...
February 11, 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
February 11, 2015

linear algebra
Your cheating isn't helping you Hannah, I hope you know that this will be seen by the school, and there will be major punishment, and webmails going to your mother. I hope you don't mind that!
February 3, 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
February 2, 2015

math
A tile is the basic unit that makes an entire floor pattern what fraction is white? Green? Yellow? brown?
February 2, 2015

Math
if x erasers have a weight of 80 grams, what is the total weight of 50 erasers?
January 12, 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 -> 6C2 + 3H2O...
December 1, 2014

Literature
Which of the following passages from “The Garden of Stubborn Cats” is a clue that the cats symbolize resistance to order? A. “Following his tabby friend, Marcovaldo had started looking at places as if through the round eyes of a cat ….” B. “On the...
October 8, 2014

Literature
thank u!
October 8, 2014

Literature
The chaperone allowed it, so Sarita and Pepe _____ to dance. A. begun B. began C. beginned D. will have begun A or B which A sounds better?
October 8, 2014

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??
October 8, 2014

Literature
Which of these statements includes details about setting? A. A new student in school wants desperately to make friends. B. You can get satisfaction from trying, even if you do not succeed. C. The Great Depression had put half of the town out of work. D. Nobody has seen the ...
October 8, 2014

Chemistry
A gas mixture composed of helium and argon has a density of 0.846g/L at a 734mmHg and 298 K. What is the composition of the mixture by volume?
October 8, 2014

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 is the ...
October 8, 2014

physics
A soccer ball is kicked from the ground with an initial speed of 19.4 m/s at an upward angle of 49.8˚. A player 48.5 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before ...
October 2, 2014

Precalc
A taxi company charges $4.00 for the first mile (or part of a mile) and 40 cents for each succeeding tenth of a mile (or part). Express the cost C (in dollars) of a ride as a piecewise-defined function of the distance x traveled (in miles) for 0 < x ≤ 2.
September 7, 2014

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 point of the solution is ...
May 22, 2014

Chemistry
that makes sense thank u!
May 22, 2014

Chemistry
If the solubility of a gas in water is 1.22 g/L at 2.75 atm, what is its solubility (in g/L) at 1.0 atm? A. 0.44 g/L B. 3.97 g/L C. 2.25 g/L D. 3.36 g/L I think the answer is C.. i did 2.75 x 1.0 = 2.75 / 1.22 = 2.25 but people say the answer is A... why? i think the answer is...
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. 101.3 kPa B or C???
May 21, 2014

Chemistry
Calculate the molarity of 17.g of NaCl in 881 ml of solution
April 13, 2014

chemistry
Sodium sulfate is slowly added to a solution containing 0.0500 M Ca2 (aq) and 0.0210 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate? Ksp=1.20×10^–5 silver sulfate ksp=4.93x 10 ^-5 calcium sulfate
April 10, 2014

statistics
A.) .55067 B.) .30119 C.).3297
April 9, 2014

Math!!!!
thanks!!! i will ask some more later(:
March 26, 2014

Math!!!!
y-(-3)= -1/2(x-(0)) How do you solve this equation and graph?????
March 26, 2014

Math
The names, or notes, of all the white keys on a piano are written on pieces of paper and placed in a cup. There are 7 sets of the notes D, E, F, and G and 8 sets of the notes A, B,and C. If a person draws one note out of the cup without looking, what are his or her chances of ...
March 20, 2014

chemistry
if you had 0.028 moles of copper sulfide, how many grams would you have?
March 20, 2014

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 conjecture is true. I think ...
March 20, 2014

Science URGENT
Hi, I am working on stoichiometry and limiting reactant problems. I have worked through examples in my book and I did them right and can solve for the excess, however there is one problem in the book that has confused me. I don't understand why they identified the limiting...
March 12, 2014

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