Saturday

April 19, 2014

April 19, 2014

Total # Posts: 376

**physics **

Mary is standing at a place such that she makes an angle of 42° to the right of the normal of a mirror. Where should Mary's mom stand so that she can best see Mary's reflection in the mirror?

**math**

Jim paid $ 5.55 for 1 notepad and 7 pencils. Anne paid $ 12.28 for 3 notepads and 2 pencils. How much does each notepad cost? Show all work. Thanks

**Algebra II**

70

**math**

you have a 2.5 od pipe can you get the same flow from two 1.and a quarter od pipe

**physics**

What is the pressure that is exerted by a box tjat has a dimension of 12cm long and 14cm wide and has a force of gravity on the box of 40N?

**chemistry**

How do I determine how many moles of KMnO4 it takes to neutralize C2O4-?

**math**

simplifies (8+12)5/6-5A+11

**Algebra**

Solve using FOIL (y-2) (3y3-5y+7)

**algebra**

(4a2+9b5) - (-2a2-6b5)

**math**

5, 6

**algebra**

Evaluate each polynomial for the given value of the variable. –x2-5x+6; x= -3 2x2-4x-1; x= 5

**algebra**

1

**algebra**

1

**algebra**

Simplify (x^3y^4/z^6)^2 (a^0b^6)^0 (-2x)^-6 (4^2)^3 (x/3)^4

**math**

Two sides of an equilateral triangle have lengths x+2 and -2x+20 which could be the length of the third side:14-x or 2x+4? A. 14-xonly B. Both 14x and 2x+4 C. 2x+4 only. D. Neither 14-x nor 2x+4

**algebra**

Stacy wants to build a triangular sand box for her son. Using the figure below, calculate the area of the triangular box, writing the answer as a polynomial. (Hint: A=1/2bh) x+2 7x-1 2x+6

**algebra**

Sam needs to fill up a box with packaging material. Use the picture below to calculate the volume of the box. 2x+3 x-3 x+2

**algebra**

Add polynomials (4y+5y2) + (2y3-8y2)

**algebra**

. Victoria wants to plant a vegetable garden in the shape of a square. She has a space allocated in her backyard that will accommodate 175 square feet. Using the drawing below, use the FOIL method to find the polynomial that represents the area of the square. If x=6, will she ...

**algebra**

John wants to hire an editor to check his thesis paper. The editor charges a flat rate of $50 and $2 per page. Write a polynomial to describe the cost. Find the cost of editing 75 pages.

**algebra**

Is (x+y)2 equal to (x2+y2)? Explain why or why not using an example to support your answer.

**algebra**

(5.2 x 1013) (7.1 x 10-22) write the answer in scientific notation

**MAT-134 Math XL**

Factor out the greatest common factor. Simplify if possible. 9x^6-63x^5+36x^4=

**MAT-134 Math XL**

factor out the gcf simplify if possible. 3x^7 - 9x^6 + 24x^5

**algebra**

Mary has a total of $5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was $331. Write and solve a system of equations to find out how much she has invested in both accounts.

**Algebra**

Terry is mailing two boxes. Together they weigh 21 lbs. If the smaller box is 5 lbs. less than the larger one, how much does each box weigh? Write and solve an equation that models this scenario.

**algebra**

The sum of two numbers is 30 and their difference is 2. Find the two numbers by writing and solving a system of equations.

**algebra**

A music concert was attended by 450 people. Adult tickets sold for $70 and children’s tickets for $40. If total sales were $27,750, how much of each ticket was sold?

**algebra**

Rachel has 15 coins with a value of $2.85. If the coins are either dimes or quarters, how many of each coin does she have? Write and solve using a system of equations

**algebra**

x=6y+2 3x-18y=4

**algebra**

Peter is throwing a surprise party for his friend Tammy. He has a budget of $350. If the restaurant charges $20 per person for drinks and food and a cleanup fee of $35, what is the maximum number of people that he can invite to stay within budget? Write and solve an inequality.

**algebra**

The Parker’s are installing a wooden fence in their backyard. They have 330 feet of wood. The length can be no more than 90 feet. Write and solve an inequality to find the maximum width of the fence.

**math**

The tax on a purchase was $9.33. If the sales tax rate is 6%, how much was the purchase?

**Math**

I have a similar problem The LCM of two numbers is 36. The GCF is 6. One number is 6 more than the other. The numbers are ------- and ------. If someone could show me how to do this one, I could figure out the other 5 I have to do (maybe) Thank you very much.

**Physics**

In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots. The horizontal distance between the buildings is 40.0 m, and the heights of the Jackson and Walton buildings are, respectively, 1...

**MAT-134 Math XL**

Graph the following linear equation using one of the following methods: 1st slope intercept form y = mx + b 2nd table of values 3rd x-intercept and y-intercept 1. 3x + 4y = 12

**math **

Eric and Madison both measured the same trading card. Eric says the card is 3 inches long. Madison says it is 2 3/4in long. The teacher says they are both right. How is this possible?

**Math**

can you show me how 7 friends share 3 liters of soda equally?

**Math**

How would 7 people share 3 liters of soda equally?

**Social Studies**

My answer is D

**Social Studies**

Advances in all of the following except ____ have led to rapid population growth in recent years. A. Sanitation B. Farming Methods C. Medicine D. Computers

**PHYSICS IMP PLS**

You should use the equation dv = -v_ex*ln(m_f/m_i). You need to determine how much fuel is burned throughout the first 145 seconds, than substract that number from the initial mass to get m_f. After that, to find a, you need to find the derivative of the above equation. (You c...

**College Algebra**

1. 2log8^x=log8(4x+12) both log bases are 8. I have no clue what to do. 2. 1/2ln (x) -3 ln y - ln (z-2) so far for this second one i have ln sqrt(x)-ln y^3 - ln (z-2) dont know what to do next

**College Algebra**

Find a Quadratic polynomial function with real coefficients satisfying the given conditions. -4 and 3 are zeros; f(1) = -30 HELP. I have no idea.

**Chemistry**

Oxygen gas can be generated by heating KClO3 in the presence of some MnO2. 2KClO3 → 2KCl + 3O2 If all the KClO3 in a mixture containing 1.58 g KClO3 and 0.30 g MnO2 is decomposed, how many liters of O2 gas will be generated at T = 25.0°C and P = 760.6 torr?

**physics**

.019M

**physics**

.019M

**chem**

if a rock climber accidentally drops a 56 gram piton from a height of 375 meters, what would its speed be before striking the ground ignore the air resistance

**physics**

A 1310-kg car is being driven up a 9.12 ° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of 541 N. A force F is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act o...

**chem word problem **

.A gas at 72 °C occupies 10 L. What is the temperature in Kelvin when it expands to a volume of 22 L? Round to the nearest whole number and don't forget the units. is it charles or boyles law? my answer cam out to be 6.7k but i know its wrong

**Geometry**

the vertices of a parallelogram are a(3,-1),b(4, 3),c(7, 5), and d(6, 1). at what point do the diagonals intersect?

**math**

Jenny borrowed $500 for five years at 4 percent interest, compounded annually. What is the total amount she will have paid when she pays off the loan?

**Physics**

An electric space heater draws 15.5 A from a 120 V source. It is operated, on the average, for 4.0 h each day. (b) How much energy in kWh does in consume in 30 days? (c) At 11 per kWh, how much does it cost to operate the heater for 30 days?

**Physics**

A 100 W lamp is connected to 120 V, and its current is measured. A resistor is added to the lamp to reduce the current to half its original value. (a) What is the potential difference across the lamp? (b) How much resistance was added to the circuit? (c) How much power is now ...

**Physics**

A circuit contains six 270 lamps and a 18.0 heater connected in parallel. The voltage across the circuit is 120 V. (a) What is the current in the circuit when four lamps are turned on? (b) What is the current in the circuit when all lamps are on? (c) What is the current in the...

**Physics**

A transistor radio operates by means of a 9.0 V battery that supplies it with a 40 mA current. (a) If the cost of the battery is $0.50 and it lasts for 300 h, what is the cost per kWh to operate the radio in this manner? (b) The same radio, by means of a converter, is plugged ...

**Math-Help**

Where did you get 1263 from>?

**physics**

The curved artery can be approximated as a semicircular arch whose diameter is 4.9 cm. If blood flows through the aortic arch at a speed of 0.35 m/s, what is the magnitude (in m/s2) of the blood's centripetal acceleration?

**physics**

Two charges, qA and qB, are separated by a distance, d, and exert a force, F, on each other. Analyze Coulomb's law and answer the following questions. (a) What new force will exist if qA is doubled? (b) What new force will exist if qA and qB are cut in half? (c) What new f...

**physics**

A strong lightning bolt transfers about 26 C to Earth. How many electrons are transferred?

**physics**

A 6 N force acts on a current carrying wire of length 0.5 m that is placed in a 1.5 T external magnetic field. What is the current in the wire?

**physics**

A wire that is 46 cm long is parallel to a 0.54 T uniform magnetic field. The current through the wire is 4.5 A. What force acts on the wire?

**math**

Ms sue can u explan the answer

**math**

What is the range of this data 36.75.63.49.83.46.54.79

**math**

21 inch

**math**

o ok i got it 1/2 1/3 1/4 1/5 1/6 1/7 1/8 1/9 1/10 thanks

**math**

n(A) is the cardinal of the sets and how did you get the #18

**math**

find n(A)for each set A={1/2, -1/2, 1/3, -1/3,..., 1/10, -1/10}

**Physics**

A hockey puck has a mass of 0.120 kg and is at rest. A hockey player makes a shot, exerting a constant force of 29.5 N on the puck for 0.16 s. With what speed does it head toward the goal?

**Physics**

You take a ride in a fast elevator to the top of a tall building and ride back down while standing on a bathroom scale. During which parts of the ride will your apparent and real weights be the same? During which parts will your apparent weight be less than your real weight? D...

**Physics**

A 200-N box is placed on an inclined plane that makes a 35.0° angle with the horizontal. Find the component of the weight force parallel to the plane's surface.

**Physics**

A bag is dropped from a hovering helicopter. The bag has fallen for 1.8 s. What is the bag's velocity? How far has the bag fallen?

**Physics**

A brick is dropped from a high scaffold. (a) What is its velocity after 4.5 s? m/s (b) How far does the brick fall during this time?

**Physics**

Engineers are developing new types of guns that might someday be used to launch satellites as if they were bullets. One such gun can give a small object a velocity of 4.4 km/s while moving it through a distance of only 1.6 cm. (a) What acceleration does the gun give this objec...

**Math**

Charlie paid for his purchases with a $50.00 bill. He paid $2.34 sales tax on his purchases and received $8.70 in change. If Charlie bought 8 items what is the average cost of one item without tax?

**physic**

An airplane flies due north at 200 km/h relative to the air. There is a wind blowing at 70 km/h to the northeast relative to the ground. What are the plane's speed and direction relative to the ground?

**Physics**

A 170-N box is placed on an inclined plane that makes a 35.0° angle with the horizontal. Find the component of the weight force parallel to the plane's surface.

**Physics**

A ball is kicked off a field with sufficient force and a trajectory such that it travels horizontally 60m with a maximum altitude of 20m. What was the initial speed? What was the trajectory angle?

**english**

ashley

**Calculus**

The population (in thousands) of the Tzitzit bird is well described by a function of the form P(t) = ae^kt, where t is the time in years and a and k are constants. If the population was 10 thousand when t-0 and 300 thousand when t=3, determine the constants a and k exactly. Th...

**Box and whisker plot math**

How do I read a box-and-whisker plot ?? Please help with example if you can?? Thank you so much.

**Help Ms. Sue ?? 6th grade math Statistics and Graphs**

But,wouldn't the average be misleading statistic when so many students have no pets? Another student has just one pet. One kids has alot 30 pets when the others have a little.

**6th grade math Statistics and Graphs**

ok thanks!

**6th grade math Statistics and Graphs**

If I were to do a survey on how many students have pets in my class should I include the zero amount of kids that didn't have pets in my calcualtion?

**History**

So its Yangtze? But its spelled different

**History**

I need help, m guess is c but not sure

**History**

During the Song Dynasty, Jurchen invaders from the North forced the Song to withdraw past the a.Gobi Desert b.Himalayas c.Yellow River d.Yangtze River e.Mekong Delta

**Help**

Does anyone know?

**History**

thiking the shire but not positive

**History**

The responsibility of compiling the data from the Domesday Survey fell to The Norman King the shire tenant in chief the office of the Exchequer the local sheriff none of the above

**golden oak**

Fractions and decimals. how to make whole numbers. and mixed numbers .

**Chem**

45

**physics**

A helicopter 8.70 above the ground and descending at 2.60 drops a package from rest (relative to the helicopter). We have chosen the positive positive direction to be upward. The package falls freely. Just as it hits the ground, find the velocity of the package relative to the...

**math**

A math has a scale of 3 cm: 18 km. If Riverside and Smithville are 54 km apart then they are how far apart on the map?

**English 3**

A dependent clause is also called a(n): adverb clause subordinate clause adjective clause

**Chemistry**

I have a question for chem 1LD webworks number 4. it asks to repeat the previous question steps and find the delta H for the high spin and low spin for Fe(ox)3 3- but calculate with B3LYP, 6-31G* instead of a semi-empirical

**geomerty**

a wheel has a dimater of 12 cm, how many turns does it take to go 2 meters?

**english**

FYSUSS

**Math**

A radio substance has a half-life of 10 years. What is its annual decay rate?

**Math**

Expand Your Knowledge: Negative Binomial Distribution Suppose you have binomial trials for which the probability of success on each trial is p and the probability of failure is q= 1-p. Let k be a fixed whole number greater than or equal to 1. Let n be the number of the trial o...