Wednesday

February 10, 2016
Total # Posts: 821

**Pre - CALCULUS**

B ?
*April 11, 2015*

**Pre - CALCULUS**

Find the inverse of the matrix, if possible. A = { 0 -6 } {-2 -5} A. 0 -1/2 -1/6 5/12 B. -1/6 0 5/12 - 1/2 C. 5/12 - 1/2 -1/6 0 D. 5/12 1/2 1/6 0 C ?
*April 11, 2015*

**Pre - CALCULUS**

Thanks !
*April 11, 2015*

**Pre - CALCULUS**

SO I'm right ? :)
*April 11, 2015*

**Pre - CALCULUS**

Use Cramer's rule to solve the system. 2x + 4y - z = 32 x - 2y + 2z = -5 5x + y + z = 20 A. {( 1, -9, -6)} B. {( 2, 7, 6)} C. {( 9, 6, 9)} D. {( 1, 9, 6)} d ?
*April 11, 2015*

**pre - CALCULUS**

c ? :)
*April 11, 2015*

**pre - CALCULUS**

Let B = [-1 3 6 -3]. Find -4B. A. [-4 12 24 -12] B. [-3 1 4 -5] C. [4 -12 -24 12] D. [4 3 6 -3] b ?
*April 11, 2015*

**pre - CALCULUS**

thank you guys :)
*April 11, 2015*

**pre - CALCULUS**

Use Cramer's rule to determine if the system is inconsistent system or contains dependent equations. 2x + y = 8 6x + 3y = 24 A. system is inconsistent B. system contains dependent equations b ?
*April 11, 2015*

**pre - CALCULUS**

Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions, using set notation to express their solution sets. x + y = -8 x - y = 14 A. {( 3, -11)} B. {( 3, 11)} C. {(x, y) | x + y = -8} D. ∅ B?
*April 11, 2015*

**pre - CALCULUS**

Complete the following: (a) Use the Leading Coefficient Test to determine the graph's end behavior. (b) Find the x-intercepts. State whether the graph crosses the x-axis or touches the x-axis and turns around at each intercept. Show your work. (c) Find the y-intercept. ...
*April 10, 2015*

**pre - CALCULUS**

lol thank you so much again :)
*April 10, 2015*

**pre - CALCULUS**

Use the compound interest formulas A = Pert and A = P(1 + 𝑟/n)^nt to solve. Suppose that you have $11,000 to invest. Which investment yields the greater return over 10 years: 6.25% compounded continuously or 6.3% compounded semiannually? Show your work.
*April 10, 2015*

**Pre - CALCULUS**

You can do the rest here , Thank you by the way !
*April 10, 2015*

**Pre - CALCULUS**

For the data set shown by the table, a. Create a scatter plot for the data. (You do not need to submit the scatter plot) b. Use the scatter plot to determine whether an exponential function or a logarithmic function is the best choice for modeling the data. Number of Homes ...
*April 10, 2015*

**pre - CALCULUS**

Yeah sorry , I was trying to re post it so it would be easier for you to see it , But i seen that you replied , I replied back
*April 10, 2015*

**pre - CALCULUS**

Begin by graphing the standard absolute value function f(x) = | x |. Then use transformations of this graph to describe the graph the given function. h(x) = 2 | x | + 2
*April 10, 2015*

**pre - CALCULUS**

Thank you !! Can you help with my other two questions i had post ?
*April 10, 2015*

**pre - CALCULUS**

Can you show your work please ? and thats what the question says exactly
*April 10, 2015*

**pre - CALCULUS**

Find the specified vector or scalar. Show your work. u = -4i + 1j and v = 4i + 1j; Find ‖𝑢 + 𝑣‖.
*April 10, 2015*

**pre - CALCULUS**

Thank you
*April 10, 2015*

**pre - CALCULUS**

Find functions f and g so that h(x) = (f ∘ g)(x). h(x) = (6x - 14)8
*April 10, 2015*

**pre - CALCULUS**

Thank you !!!
*April 10, 2015*

**pre - CALCULUS**

Oh so the answer is (1,1) .. How can I describe it ? cause it says "Then use transformations of this graph to describe the graph the given function. "
*April 10, 2015*

**pre - CALCULUS**

when do i stop ? 1,1 ---> 1,6 1,1 1,8 2,2 2,4
*April 10, 2015*

**pre - CALCULUS**

Begin by graphing the standard absolute value function f(x) = | x |. Then use transformations of this graph to describe the graph the given function. h(x) = 2 | x | + 2
*April 10, 2015*

**pre - CALCULUS**

Thank you !!
*April 10, 2015*

**pre - CALCULUS**

Find the reference angle for the given angle. Show your work. -404° my answer is 44 degree , But i don't know how to put my work together..
*April 10, 2015*

**pre - CALCULUS**

Find functions f and g so that h(x) = (f ∘ g)(x). h(x) = (6x - 14)8
*April 10, 2015*

**Pre - CALCULUS**

B^2-4AC= 144-120= 24 x=12+sqrt24 / 12 2*2*2*3 sqrt24=sqrt2*2*2*3= + 2* sqrt6 x=(12+2*2.449)/12 x =(12+√24)/12=1+1/6√ 6 = 1.408
*April 10, 2015*

**Pre - CALCULUS**

6x2 ?
*April 10, 2015*

**Pre - CALCULUS**

Find the x-intercepts (if any) for the graph of the quadratic function. 6x2 +12x+5=0 Give your answers in exact form. Show your work.
*April 10, 2015*

**pre - CALCULUS**

The wind chill factor represents the equivalent air temperature at a standard wind speed that would produce the same heat loss as the given temperature and wind speed. One formula for computing the equivalent temperature is 𝑡 W(t) = {33 − (10.45+10√𝑣...
*April 9, 2015*

**pre - CALCULUS**

Yeah I had this answer , just making sure , Thank you :)
*April 9, 2015*

**pre - CALCULUS**

Verify the identity. Show your work. (1 + tan2u)(1 - sin2u) = 1
*April 9, 2015*

**pre - CALCULUS**

The wind chill factor represents the equivalent air temperature at a standard wind speed that would produce the same heat loss as the given temperature and wind speed. One formula for computing the equivalent temperature is 𝑡 W(t) = {33 − (10.45+10√𝑣...
*April 9, 2015*

**pre - CALCULUS**

Thank you !!
*April 9, 2015*

**pre - CALCULUS**

A gas company has the following rate schedule for natural gas usage in single-family residences: Monthly service charge Per therm service charge 1st 25 therms Over 25 therms $8.80 $0.6686/therm $0.85870/therm What is the charge for using 25 therms in one month? Show your work...
*April 9, 2015*

**pre - CALCULUS**

Thank you !
*April 9, 2015*

**pre - CALCULUS**

Verify the identity. Show your work. cot θ ∙ sec θ = csc θ
*April 9, 2015*

**PRE - CALCULUS**

Thank you
*April 8, 2015*

**PRE - CALCULUS**

Solve the quadratic equation by the square root property. (2x + 5)2 = 49 A. {-6, 1} B. {0, 1} C. {-27, 27} D. {1, 6} d?
*April 8, 2015*

**PRE - CALCULUS**

I did do that but i had got it wrong
*April 8, 2015*

**PRE - CALCULUS**

Evaluate the radical expressions or indicate that the root is not a real number. 3sqrt-4^3 A. -64 B. 4 C. -4 D. not a real number B?
*April 8, 2015*

**Physics !**

A. series R=r+r+r parallel 1/r=1/r+1/r+1/r B. series R=R1+R2+R3 Parallel 1/R= 1/r1+1/r2+1/r3 C. p=1xV=90 mA x 9V=0.81W D. 3(1/3) Ax120 V= 120 W) Are those right so far ?
*April 7, 2015*

**Physics !**

Three identical light bulbs are connected in series, then are disconnected and arranged in parallel. For each of the scenarios below indicate what changes (if any) take place A. Total resistance of the circuit B. Total current of the circuit C. Power dissipated by the circuit ...
*April 7, 2015*

**Physics!**

THANK YOU !!!!
*April 7, 2015*

**Physics!**

An ammeter indicates the current for a toaster is 5.0 amps when the toaster is connected to 120-V circuit. How much energy is given off by the toaster in 42.0 seconds? Show all calculations leading to an answer.
*April 7, 2015*

**I NEED HELP WITH THIS**

Three identical light bulbs are connected in series, then are disconnected and arranged in parallel. For each of the scenarios below indicate what changes (if any) take place A. Total resistance of the circuit B. Total current of the circuit C. Power dissipated by the circuit ...
*April 7, 2015*

**Physics!**

An ammeter indicates the current for a toaster is 5.0 amps when the toaster is connected to 120-V circuit. How much energy is given off by the toaster in 42.0 seconds? show all the calculations leading to your answer
*April 7, 2015*

**Physics**

A hard-rubber or plastic comb rubbed against wool can often be shown to have a static charge. Why does a metal comb not readily show a static charge when rubbed against wool?
*April 6, 2015*

**Help please**

No some will answer other people "physic" questions but not mine. So I thought this time I'll type "please help" to catch someones attention and I did with you.
*April 6, 2015*

**Help please**

Well I have been doing that the past 2 days and I haven't been getting help.
*April 6, 2015*

**Help please **

A hard-rubber or plastic comb rubbed against wool can often be shown to have a static charge. Why does a metal comb not readily show a static charge when rubbed against wool?
*April 6, 2015*

**physics**

Consider eight two-cubic centimeter (2 cm3) sugar cubes stacked so that they form a single 2 x 2 x 2 cube. How does the surface area of the single, large cube compare to the total surface area of the individual eight cubes? Report your answer as a ratio. Be sure to show all ...
*April 6, 2015*

**physics**

A falling 50-kg skydiver experiences an upward acceleration of 6.2 m/s2 when she opens her parachute. Show (by calculation) how much drag force is produced by the parachute. (50*10)=500N (10+6.2)=16.2m/sec^2 force = (ma)=50*16.2=810N
*April 5, 2015*

**physics**

The sun’s mass is about 2.7 x 107 times greater than the moon’s mass. The sun is about 400 times farther from Earth than the moon. How does the gravitational force exerted on Earth by the sun compare with the gravitational force exerted on Earth by the moon? Amoon = ...
*April 5, 2015*

**physics **

A 2.0-gram bullet is shot into a tree stump. It enters at a speed of 3.00 x 104 cm/s and comes to rest after having penetrated 0.05 m in to the stump. What was the average force during the impact? Show all calculations leading to an answer. KE 1= 1/2*0.002kg*300^2m/s=30 j KE2=...
*April 5, 2015*

**physics**

(2m)u = (m+2m)v v= (2/3)u = (2/3)(5meters/s) = 3.33 meters/s
*April 5, 2015*

**physics **

If a stationary cart is struck head-on by a cart with twice mass of the stationary one and a velocity of 5 m/s, what will be the new velocity of the stationary cart if the collision is inelastic? Show all calculations leading to an answer.
*April 5, 2015*

**physics **

At a particular point, a satellite in an elliptical orbit has a gravitational potential energy of 7000 MJ with respect to Earth’s surface and a kinetic energy of 4000 MJ. At another point in its orbit, the satellite’s potential energy is 2000 MJ. What is its kinetic ...
*April 5, 2015*

**physics **

Leon’s bicycle wheels have a circumference of 2 m. What is his linear speed when the wheels rotate at 1 revolution per second? Show all work leading to your answer. The wheel doesn't slip on the ground so the ground goes by at the same rate that a point on the rim of ...
*April 5, 2015*

**Physics**

If a freely falling rock were equipped with a speedometer, by how much would its speed readings increase with each second IF it were on a planet where g = 20 m/s2? Show all work leading to your answer. g=20 m/s^2 20 m/s V=gt S=g( T ^2) / 2 Is this right ?
*April 5, 2015*

**Physics**

If a person weighs 500 N on Earth, what would she weigh on Jupiter, where the acceleration due to gravity is 26 m/s2? Show all work leading to your answer.
*April 5, 2015*

**personal finance**

Future value calculations are also referred to as: A. discounting. B. add-on interest. C. compounding. D. simple interest. D?
*April 3, 2015*

**personal finance**

Okay thanks
*April 3, 2015*

**personal finance**

PSI, a financial services consultant, estimates that over _____ million U.S. households have a net worth in excess of $1 million. A. 4 B. 5 C. 10 D. 20 D ?
*April 3, 2015*

**reading and literature**

Thank you
*February 9, 2015*

**reading and literature**

Okay thanks so much , I read it , it helped and so did you :)
*February 9, 2015*

**reading and literature**

what does fable mean ? is it an old time story ? and a moral means the setting , the point of the story or does it mean it should have a bad behavior in it ?
*February 9, 2015*

**reading and literature**

what does "Create an original fable with a clear moral" mean ? Am I supposed to make up my own story ?
*February 9, 2015*

**math**

For every cup of seltzer you use, how much orange juice do you use?
*January 28, 2015*

**math**

if a basketball is dropped from 160 feet, what is the total vertical distance the ball will travel from the moment it is dropped to the time it hits the floor for the fifth time?
*December 23, 2014*

**chemistry**

What is the value of A in the following nuclear reaction? 212/84Po→208/82Pb+A/ZX
*December 8, 2014*

**physics**

nvm I figured it out... the answer was -1.6*10^-2 m
*December 6, 2014*

**physics**

A 265g mass attached to a horizontal spring oscillates at a frequency of 1.00Hz . At t =0s, the mass is at x= 4.20cm and has vx = − 1*.0cm/s. Determine the position at t= 3.60s. So I already found that... The period is 1.0000 s The angular frequency is 6.2832 rad/s The ...
*December 6, 2014*

**biology **

To find out which key will open a lock, you try several until one works. This kind of learning is called ________________________.
*December 2, 2014*

**Science**

specific heat for liquid water is 4190 c (J/kg*K)
*November 29, 2014*

**Science**

A 40.0 g block of ice at -15 degrees C is dropped into a calorimeter (of negligible heat capacity) containing water at 15 degrees C. When equilibrium is reached, the final temperature is 8.0 degrees C. How much water did the calorimeter contain initially? Specific heat of ice ...
*November 29, 2014*

**math**

Write a number sentence. There are 17 goats in the barn. 8 goats go outside. How many goats are still in the barn?
*November 9, 2014*

**Biology **

1. Mitochondria and chloroplasts reproduce the same way free-living bacteria do—by _____________. My answer: Binary fission. 2. The tropism that allows seedlings to find their way out of the soil and into the sunlight is _________________. My answer: Positive tropism. &...
*October 23, 2014*

**math**

A person purchased a $204,815 home 10 years ago by paying 10% down and signing a 30-year mortgage at 10.2% compounded monthly. Interest rates have dropped and the owner wants to refinance the unpaid balance by signing a new 30-year mortgage at 5.1% compounded monthly. How much...
*October 4, 2014*

**gemetry**

How does the volume of a cone change when the radius is quadrupled and the height is reduced to 2004-06-01-04-00_files/i0300000.jpg of its original size
*September 25, 2014*

**Math**

Oh , Thank you so much
*August 5, 2014*

**Math**

Given f(x) = 2x 4 - 3x 2 - 8x + 4, what is f(3)? A. 88 B. 115 C. 131 D. 133 A?
*August 5, 2014*

**math**

Which of the following represents the zeros of the function g(x) = x 3 - 9x 2 + 2x + 48? A. x = –8, x = 2, and x = –3 B. x = 8, x = –2, and x = 3 C. x = 6, x = –4, and x = 9 D. x = –6, x = 4, and x = –9 I need help
*August 5, 2014*

**Math**

no , So its D ? 2 inches
*August 5, 2014*

**Math**

Arlan needs to create a box from a piece of cardboard. The dimensions of his cardboard are 10 inches by 8 inches. He must cut a square from each corner of the cardboard, in order to form a box. What size square should he cut from each corner, in order to create a box with the...
*August 5, 2014*

**Math**

Thank you so MUCH ! :)
*August 5, 2014*

**Math**

Thankyou:)
*August 5, 2014*

**Math**

Ohh I get it now , Thanks so much , but now im kinda confused about the negative signs
*August 5, 2014*

**Math**

That's the question , but you wrote +3 twice , the middle one is -3|0-1|
*August 5, 2014*

**Math**

it just says what does it equal
*August 5, 2014*

**Math**

what am I supposed to type in matrix b ?
*August 5, 2014*

**Math**

well it didn't come out right again but thank you anyway , Ill check at out rigt now
*August 5, 2014*

**Math**

it has a -3 on the outside of it |-8 4| -3|0 -1| |6 3| That's how it looks
*August 5, 2014*

**Math**

There Matrices , Sorry I don't know how to type it on the laptop
*August 5, 2014*

**Math**

what does [-8 4] equal ? -3[ 0-1] [ 6 3] How do I do this ? Help please
*August 5, 2014*

**Algebra**

Thank you
*April 3, 2014*

**Algebra**

1. Find the quotient: e^2-e-12/e-4 A. e+3/e-4 b. e^2+3 C. e-3 D. e+3 2. Find the quotient: (a^2+11a+30) / (a + 5) A. a+6 B. a^2 + 10a+25 C. a^2 + 11a + 25 D. a+6/a+5 3. Find the LCM for x^2+3x+2 and x^2 +5x+6. A. (x+1)(x+2)(x+3) B. x+1 C. x+3 D. (x+1)(x+3) Need help with these...
*April 3, 2014*