Tuesday

September 27, 2016
Total # Posts: 100,098

**math**

3x+y=6/2x-y=1

*July 23, 2016*

**Physics**

the same

*July 23, 2016*

**Linear equations in 1 variable**

5x+2(3x)=77 5x+6x=77 11x=77 x=77/11 .`.[x=7]

*July 23, 2016*

**Science**

What is the kinetic energy of 0.5 kg soccer ball that is travelling at a velocity of 3m/s?

*July 22, 2016*

**math**

find the probability of choosing a queen or a diamond from a standard deck of 52 cards

*July 22, 2016*

**math**

Find the probability of choosing spade or a red card from a standard deck of 52 cards

*July 22, 2016*

**math**

Write the equation in standard form, given the following information. vertex(-2,4), directrix y=1

*July 22, 2016*

**probability**

In the state of Georgia, telephone numbers consists of 10 digits, including the area code. One of these area codes is 770. The first digit following the area code cannot be 1 or 0. Find the number of possibilities for telephone numbers in area code 770. How many different ...

*July 22, 2016*

**math**

find missing denominator of 3\7=15\? to show equivalent fraction

*July 22, 2016*

**Math**

a) Find the values of x and y so that the ordered data below has a median of 31 and a mean of 31.25. 13, 17, 25, 27, 28, x, 32, 36, 37, 40, y, 47 b) The numbers below have been written in ascending order. Find the values of a, b, c and d if the mode is 15, the median is 17, ...

*July 22, 2016*

**Math**

A girl leaves her home A at 9am, and after cycling for 25km at 5km/h she reaches her destination B at 2pm. After having lunch at B for 90 minutes, she sets off for home. On the way home she stops for half an hour to see a friend who lives at C, which is 10km from A. At 5:30pm...

*July 22, 2016*

**Physics**

Searches related to a stone is projected vertically upward with a speed of 14m/s from a tower 100m high. find the maximum height attained and the speed with which it strikes the ground

*July 22, 2016*

**Physics**

thanku you soo much

*July 21, 2016*

**Math CSET**

The answe is 99.85%. There is .15% on each side of the normal curve past three standard deviations.

*July 21, 2016*

**Arithmetic/Geometric Sequence**

2/3, 1/3, 2/9, 1/6 Create an explicit formula for this. Is it an arithmetic or geometric sequence?

*July 21, 2016*

**Math**

H-gha37

*July 21, 2016*

**Math**

At a certain store, employees may buy clothing at a 20% discount from the original price, but must pay a 6% sales tax. If the final cost of a sweater purchased by an employee is $55.12 what is the original price of the sweater, before the discount and tax? Explain please

*July 20, 2016*

**Math**

In a group of 500 students, 150 are studying physics, 220 are studying biology, and 100 are studying chemistry. At least 25 students are studying more than one of these sciences. What is the greatest possible number of these students that might NOT be studying any of these ...

*July 20, 2016*

**Chemistry**

How many atoms are in 0.075 mol of titanium? 2.2 × 1024 4.5 × 1022 1.2 × 10–25 6.4 × 102

*July 20, 2016*

**Chemistry**

t = tonnes

*July 20, 2016*

**Calc**

the productivity of a person at work is modeled by a cosine function: 5cos (pie/2 (t)) +5, where t is in hours. If the person starts work at t=0, being 8:00 am, at what times is the worker the least productive?

*July 20, 2016*

**Math - Trig**

october

*July 20, 2016*

**Math - Trig**

reason im asking this question is because i got April (only) but i feel as if im missing something. as in the questions it says "monthS"

*July 20, 2016*

**Math - Trig**

The equation given below models the average monthly temperature (˚C). t denotes the number of months with t=1 representing January. During which months is the average monthly temperature 12.5˚C? 𝑇(𝑡) = 12.5 + 15.8sin (𝜋/6 (𝑡) −2...

*July 20, 2016*

**Math - Trig**

also how would i figure out the radius for the wheel?

*July 20, 2016*

**Math - Trig**

A hamster enters a wheel at the lowest point and begins to run . The height of point R (in the diagram below) above the ground is given by the function ℎ(𝑡) = −17.5 cos ( 2pi/3 𝑡) + 19, where ℎ is height in centimeters and 𝑡 is time in...

*July 20, 2016*

**statistics**

find the number of units that must be produced to break even. R(x)=200x - x^2 C(x)= 70x +2200 0 < x < 100 (These < are supposed to b less than or equal to signs)

*July 20, 2016*

**Math**

If given the graph of 𝑓(𝑥) = − sin (3x + 𝜋/3 ) − 2 describe the steps you would take to draw the graph of the reciprocal function

*July 20, 2016*

**statistics**

What is straight line depreciation for an item that costs $15,951. whose life is 13 years?

*July 20, 2016*

**Math**

Clark has 7 1/2 feet of wire. Part A. How many 3/4 foot pieces can Clark cut from the 7 1/2 feet of wire? Part B. Using the information in Part A, interpret the meaning of the quotient in terms of the two fractions given.

*July 20, 2016*

**Math**

A number sentence is 50 1/2 ÷1/4 =202. Part A. Create a story or context for this number sentence. Part B. Rewrite this number sentence using multiplication. Part C. Give a verbal explanation that describes how these three numbers are related.

*July 20, 2016*

**Math**

The dimensions of a rectangular prism are Length 2/14 feet width 1 foot Height 1 1/4 feet. The length of the sides of a small cube are 1/4 foot each. Part A. How many small cubes can be packed in the rectangular prism? Part B. Use the answer obtained in Part A to find the ...

*July 20, 2016*

**Math**

if sec(x) = - squaroot 20 /3 (squroot applies to 20 not the fraction) then state the exact vale of tan (x)

*July 20, 2016*

**mathematics**

what is the probability that today is tuesday and tomorrow is wednesday

*July 20, 2016*

**physics**

a car moving through road what is the direction of force and surface of acting

*July 20, 2016*

**Math**

1.5

*July 19, 2016*

**Math**

If a(b)=b^2 -2b and 4a(b)=a(2b)-24, what is the value of b?

*July 19, 2016*

**Math**

if e and f are inversely proportional and e=3 when f=9, then what is the value of e when f=3^-1? Please help.

*July 19, 2016*

**science **

a bullet of mass 20g traveling horizontally at 100m/s embedded itself in the center of block of wood mass 1kg which is suspended by a light vertical string of length

*July 19, 2016*

**Math**

How many possible values exist for y if 4-3y<10,-y-8>-14,and y is an integer? Help?

*July 19, 2016*

**Math**

If the sum of the five consecutive integers is 80, what is the value of sum of the least of these integers and the median of these integers? Can you explain it?

*July 19, 2016*

**comprehension**

One day a crow spied a piece of cheese on a window sill. The cheese fell and was soon eaten by the crafty animal. She picked it up and flew to a neighbouring tree. a cunning fox approached and praise her voice. The bird, highly flattered, opened her mouth to sing.

*July 19, 2016*

**maths**

The denominator of a fraction is 3 more than the numerator .if 5 added to both parts the resulting fraction is equivalent 4/5 .Find the fraction.

*July 19, 2016*

**mathes**

Area of the room=8m×6m =48m²=48×10⁴cm Area of tiles =8×10=80cm No.of tiles=480000/80 =6000

*July 19, 2016*

**mathes**

A room is 8m×6m.how many tiles of 8cm×10cm are required to cover the floor?

*July 19, 2016*

**calculus**

A farmer has 100 m of fencing to make a rectangular pen with 3 congruent rectangular subdivision side by side. Each subdivisions must be 3 meter wide and at least 8 meters long. What is the range of the possible length of it's division?

*July 19, 2016*

**Calculus the derivative**

v = ds/dt =-16(2)t =-32 t -32 t = -64 ?? if that is the question the answer is 2

*July 18, 2016*

**MAth**

so then how did you derive that just by knowing? what im trying to say is how would i be able to come about that in a question that was similar like this?

*July 18, 2016*

**MAth**

but how did you get x = 7π/6 or 11π/6 when x=sin-1 (-1/2) is -π/6

*July 18, 2016*

**MAth**

*** 6sin^2(x) + 5sin(x) + 1 = 0

*July 18, 2016*

**MAth**

6sin^2(x) - 5sin(x) + 1 = 0 solve

*July 18, 2016*

**Math (PLEASE HELP!)**

The function g(x) is a transformed image of the graph of f(x)=2^x. Write the equation of the transformed function g(x) in the form g(x)= b^x-h+k. f(x) (0,1) (2,4) g(x) (-1,2) (-3,-1)

*July 18, 2016*

**Math - Trig**

Solve for exact or to 1d.p of x E [0 ,2pi] 4cos^2x-3

*July 18, 2016*

**Economics**

1. Why is it difficult for the fed to prevent recessions by lowering interest rates A. The Fed can change the rate only once each year. B. It can take years for local banks to change their rates. C. The Fed's rate does not affect business loans. D. It can take businesses ...

*July 18, 2016*

**Spanish**

well i know its something about pluto and other planets

*July 18, 2016*

**Physics**

time is distance/speed=900/30=30m/s

*July 18, 2016*

**MATH 70**

3 is less than or equal to y , and y is less than or equal to 4

*July 18, 2016*

**Health**

What does Vitality tell us?

*July 17, 2016*

**Data Analysis with spreadsheets with Lab**

You have a list of contracts and due dates for annual maintenance fees. You wish to determine when you have a contract due in the next 45 days and provide a note that warns you that the payment is due. Using the IF function.

*July 17, 2016*

**pre cal**

Describe the effect that the transformations y=8f(8x) have on the graph of y=f(x).

*July 17, 2016*

**pre cal **

If the point (40,3) is on the graph of y=f(x), what point must be on the graph of y=8f(8x)? The point (?,?) must be on the new graph.

*July 17, 2016*

**trigonometry**

if tan theta= 1/2, find the exact values of the five remaining trigonometric functions for theta, which is acute

*July 17, 2016*

**chemistry**

rust

*July 17, 2016*

**chemistry**

rust

*July 17, 2016*

**physics c**

Suppose q1 = +2.90 µC is no longer at y = 0.300 m, but is now at y = 0.244 m. The charge q2 = +2.90 µC is at x = 0 and y = 0.500 m, and the point 3 is at x = y = 0.500 m.

*July 17, 2016*

**math**

In order for Mateo to walk 1000 meters in his rectangular backyard, he must walk the length 25 times or the perimeter 10 meters. What is the are of his backyard in square meters? Thanks!

*July 17, 2016*

**math**

A circle and two separate lines are sketched on a sheet of paper. What is the largest possible number of points of intersection of these 3 figures?

*July 17, 2016*

**pre cal**

totally lost

*July 17, 2016*

**pre cal**

left 3, up 9... but the g(x) function is wrong or i might have a glitch in my online assignment

*July 17, 2016*

**pre cal**

The function f(x)=x2+6x+18 can be obtained from an even function g by shifting its graph horizontally and vertically. That even function is g(x)= ?

*July 17, 2016*

**Economics**

1. Johnny washes Mrs. Smith s car. She offers to pay Johnny with cookies but Johnny prefers cash. A. Measure of Value B. Medium of Exchange c. Store of Value 2. Johnny puts the money he earns from washing cars under his mattress. He will spend it later. A. Measure of Value B. ...

*July 17, 2016*

**MAth**

In one area of the Bay of Fundy, the tides cause the water level to rise to 7.2 m above average sea level and to drop to 7.2 m below average sea level. The time between the peak and the trough is approximately 6 hours. Determine the equation of a sinusoidal function that would...

*July 17, 2016*

**chemistry**

a 51.6 litre sample of a pure allotrope of oxygen has a mass of 100.0 grams. (25 degrees celsius and 100 kPa) Show, by calculation, which allotrope of oxygen is present.

*July 17, 2016*

**Math**

john wrote a three digit number on a piece of paper it is between 600 and 700 write down a number which john could possibly written

*July 17, 2016*

**pre calculus**

C=2 x^=8y

*July 17, 2016*

**sience**

1st reason: the radius of arterioles is smaller compared to radius of arteries so since arteries supply blood to the arterioles,arterioles offer resistance to the blood flow thus the pressure of blood in the arterioles decreases which is the reason why pressure of the blood in...

*July 17, 2016*

**algebra**

The side of a regular hexagon is denoted by ‘a’. Express the perimeter of hexagon using ‘a’.

*July 17, 2016*

**maths**

If two non parallel lines are perpendicular to other two non parallel lines prove that acute angel between first two non parallel lines is equal to acute angle between other two non parallel lines

*July 17, 2016*

**Chemistry**

Write a balanced equation for the complete oxidation reaction that occurs when ethanol (C2H5OH) burns in air.

*July 17, 2016*

**math**

what is the greatest common factor of the terms of 90x^6y^6+18x^4y^4+27x^2y^2

*July 17, 2016*

**Calculus**

A spherical balloon is being inflated.Let r(t)=3t can represents its radius at time t seconds and let g(r)=4/3 pie r be the volume of the same balloon if its radius is r.Write (g.r) in terms of t and describe what it represents.

*July 16, 2016*

**math**

your report card comes out on the day the 8millionth second passes in the new (non-leap) year. what day is that?

*July 16, 2016*

**maths**

no they are not related

*July 16, 2016*

**math**

for x = 0 x = [ 11 +/- sqrt(121 -12) ]/ 2 x = 5.5 +/- .5 sqrt(109) this is a parabola positive for x ---> + or - infinity so negative only between those roots center at x = 5.5 answers between 5.5 - .5 sqrt 109 and 5.5 + .5 sqrt 109

*July 16, 2016*

**math**

hotdog 9.5 and juice 5.5

*July 16, 2016*

**algebra**

Find the sum of the terms of geometric sequence where the first term is 4, the last term is 324 and the common ratio is 3.

*July 16, 2016*

**Physics**

initial speed = s initial ke =.5 m s^2 = E u = s cos 60 forever at top v=0 so ke = .5 m u^2 = .5 m s^2 cos^2 60 which is E cos^2 60 = E/4

*July 16, 2016*

**Healthcare**

What are some concerns in informatics? privacy and confidentiality protection of human subjects from potential misuse a and b there are no potential threats to anyone A?

*July 16, 2016*

**Physics**

Aaz=Emanuel? v = Vi - g t h = .5 g t^2 at 4.2 meters, t=time at 4.2m 4.2 = .5 g t^2 t = sqrt (8.4/g) v = Vi - sqrt (8.4 g) = 0.6 Vi so 0.4 Vi = sqrt(8.4 g) Vi = sqrt(8.4 g) / 0.4 use 9.81 or whatever you use for g and you have the initial speed up 0 = Vi - g t finds t at top ...

*July 16, 2016*

**HealthCare**

Sexually transmitted diseases are not considered as indicators of limitations of health communication. True False Help?

*July 16, 2016*

**Chemistry**

A small section of a polymer chain, containing 10 repeating units, has a relative molecular mass of 625. Which of the following monomers could have polymerised to form this chain? ethylene viyl chloride styrene glucose

*July 16, 2016*

**Calculus1**

The radius of a sector of a circle is increasing at a rate of 3 cm/sec while the area is decreasing at a rate of 1 cm2/sec. At what rate is the angle of the sector changing when the area is 20 cm2 and the radius os 5cm?

*July 15, 2016*

**Data Analysis with spreadsheets with Lab**

Using the IF function. You have a list of contracts and due dates for annual maintenance fees. You wish to determine when you have a contract due in the next 45 days and provide a note that warns you that the payment is due".

*July 15, 2016*

**Data Analysis with spreadsheets with Lab**

You wish to calculate the total pay for an employee who receives regular time for 40 hours, time and a half for 40-50 hours, and double time for over 50. Using the IF function. Please help

*July 15, 2016*

**Physics**

Determine the magnitude of current I3. Let the voltage of the bottom battery VB =13.0 volts and r= 1.0 Ω.

*July 15, 2016*

**Math**

2 x-1!=0, y = x/(2 x-1) != means doesn't equal.

*July 15, 2016*

**Health**

examples of situations displaing positive stress.

*July 15, 2016*

**science**

ALSO... Is the 36,000 km the radius of the orbit or is it the height of the satellite from Earth's surface? If it's the radius of the orbit, then ... R = orbital radius = 36,000 km = 36,000,000 m Since the orbit is specified as being circular, then ... C = ...

*July 15, 2016*

**science**

Since it's a satellite in the question is it moving in a circular motion?

*July 15, 2016*