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Posts by Jenn

Total # Posts: 319

2 math questions, urgent plz help!!
The line with equation a + 2b = 0 coincides with the terminal side of an angle ? in standard position and cos??<0 . What is the value of sin? ? ?1/2 <my answer 5? 5?/5 ?25?/5 The line with equation x?y=0 coincides with the terminal side of an angle ? in standard position...

maths
A company has 200 employees who are eligible for child care benefits. The company will pay eligible employees 25% of child day care costs, up to a maximum of $500 per child per month. If an employee has 2 children in day care at a cost of $500 per child per month, how much ...

MATH, please help
So this is a "Challenge" (we don't have to do it but my mum is making me) we haven't learned it, it's only if you want to do anything harder or more difficult. 1.explain why the ratios 6/9 and 8/12 are in proportion

MATH help ASAP
explain why the ratios 6/9 and 8/12 are in proportion. i don't understand what the question is asking?

chemistry
Derived the equation pH = pKa + Log [base] for a weak acid and its conjugate base, [acid]

chemistry
Tell how you would prepare an acetic acid/acetate buffer solution having apH of 3.79. Ka for acetic acid = 1.85 x 10-5

math
if there are 19 boys and 24 girls in the math class. 10 boys and 15 girls are freshman. if you randomly choose a student, what is the probability that it will be a girl or freshman?

College Algebra
ok, so I need to come up with an answer for this question- A car traveling 65mph on the hwy gets 25 miles per gallon. Write the function that represents the distance d(t) in miles that the car travels in t hours. *Then, Write a function that represents the number of gallons of...

Physics
Two ants race across a table 76 cm long. One travels at 5.2 cm/s and the other at 2 cm/s. When the first one crosses the finish line, how far behind is the second one? Answer in units of cm. Can you teach me how to do this plz?

Math
Please Steve, how did you find -3 and 1/3?

Math
Here is the problem. I got the answer but I would like a better understanding. Find the equation of a line that passes thru(6,-2) and is perpendicular to equation x-3y+16. I got the final answer being -3x+16. Can someone please explain how to get this? I am so confused!

Math
tan(θ)/ sec(θ) − cos(θ) Please help!

Poetry 7 - Check please!
thank you!!! i got 100%

math
If it says write the equation, five less than half a number is forty would the answer be 1/2n-5=40

Statistic
We thought if we each post a question you would answer our question. This is not a game we need help for our statistics math course before Monday day

Statistic
test consists of 10 multiple choice questions with five choices for each question. As an experiment, you GUESS on each and every answer without even reading the questions. What is the probability of getting exactly 7 questions correct on this test?

science
A 2.1kg soccer ball is struck with a 45N force for .3 seconds. What is the Frictional force if the ball rolls for 11 seconds before stopping.

English
They're different in meaning because in 1, the lady looked up AT the man. So she physically had to look up AT him. In 2, the lady looked up TO the man. As in, I look up TO my brother. He is a great student. So she idolizes him is kind of the meaning.

math
ou were named District Manager of the Month at BeBop Records due to a hiring study you conducted. Your study showed that each of 30 salespersons that you supervise average $50,000 in sales each month. Your study also showed that for each new salesperson hired, the average ...

Math
Austin bought a new house. The value of his house is modeled by the function H\left( x \right) = 120000{\left( {1.20} \right)^{\left( {\frac{1}{2}x} \right)}} where x is the number of years since he purchased the house. Looking at the model by what approximate percentage rate ...

English
Among the many marchers included,President Meyers who walked for the fifth time. Is this sentence OK, or how could I fix it?

Calculus
Does the series (cos(k/3))^2/2^(k/3)+1 from k=1 to infinity converge?

Trigonometry
16 sin^2 x = 16 − 8 cos x Find all solutions of the equation in the interval [0, 2π)

7th grade geometry
When wrapping a present in the shape of a rectangle prism, joe adds an additional 2.5 feet of paper to allow for overlap. How many sq ft does he use to wrap a gift 3.5 ft long, 18 inches wide, and 2 ft high?

Chem
c) Nearly all of the OH- comes from the first ionization. e) The approximations are usually valid because the first ionization constant is usually much larger than the second ionization constant. b) The concentration of OH- and the conjugate acid of the weak base (the anion of...

Health
its wrong the right answer is withdrawal and addiction

science
When a fan is turned on it changes electrical energy into blank energy is it ma. Motion b.magnetic c. Gravitational. D. Electromagnetic

art
omg is correct thank you! i got 100%

english please help
im really stuck,i need help

english
what's the meaning of 1. i've grown certain that the root of all fear is that we've been forced to deny who we are

english
so what exactly does the quote mean exactly? i'm sort of lost

english
what does this quote mean: never underestimate the power of stupid people in large groups please help!

Physics
A person weighing 900 Newtons is standing on snowshoes. Each snowshoe has an area of 2500cm^2. What is the pressure on the snow?

Precalculus
275, 000. $650

statistics probability
Assume that the thermometer readings are normally distributed with a mean of 0 degrees C and a standard deviation of 1.00 degrees C. A thermometer is randomly selected and tested. The probability of getting a reading between -1.39 degrees C and 1.69 degrees C is ____

geometry
Satellite Explorer VII, with a = 4465 and b = 4462, and with the center of the Earth being at one of the foci of the ellipse. Assuming the Earth has a radius of about 3960 miles,graph both the orbits of Explorer VII and earths surface on the same axis if the average radius of ...

Chemistry
What is the freezing point of a solution that contains 21.1g of urea, CO(NH2)2, in 305mL water, H2O? Assume a density of water of 1.00 g/mL.

statistics
Describe whether the following study would most likely be “observational” or “experimental”, and why it would be so. A survey examines the preferences for laundry detergent. ***The admissions office wants to estimate the cost of textbooks for students at ...

Health
2. C 5. A 7. A 13. D 14. D 17. C 19. C

Health
13. D

Managerial Accounting
I have a homework problem that asks me to do the following: 1. Prepare a schedule of total cash collections for October through December. 2. Prepare a schedule of total cash disbursements for October through December. 3. Prepare a cash budget for October through December. I ...

Physics
A basketball is thrown horizontally with an initial speed of 4.70m/s . A straight line drawn from the release point to the landing point makes an angle of 30.0 ∘ with the horizontal. What was the release height?

algebra
a squirrel can run at a speed of 20 miles per hour. How many feet per second is this?

College Algebra
Jen recently rode her bicycle to visit her friend who lives 12 miles away. On her way there, her average speed was 10 miles per hour faster than on her way home. If Jen spent a total of 1 hour bicycling, find the two rates.

Chemistry
If a sample of silver carbonate contains 1.75 grams of silver [Ag] atoms, calculate the mass (in grams) it contains of oxygen atoms [O].

Math quadratic word problem
The base of a triangle is 4cm shorter than twice the altitude, find the dimensions if the area is 80sqcm. this is work x(2x-4)=80 2x squared - 4x=80 2x squared -4x-80=0 (2x 8)(x-10) =0 so x= -8 and x=10 my classmate told me its wrong so can you pls help me.,

Math using quadratic equation
The freight train runs 12miles per hour than a passenger train. It runs 65miles in the same time that the passenger train runs 165miles find the rate of each train. I don't really know the formula using quadratic im sorry

Math using Quadratic equation
The area of a square is 196cm2(squared), find the measure of one side. Thank you,, this is my assign. In math1, im using the formula A=s*s but i need to solve this using quadratic equation.

Chemistry
How much energy, in calories, is needed to heat 18 cubic centimeters of fat from 25 degrees Celsius to 35 degrees Celsius?

algebra
A rock is thrown upward with a velocity of 15 meters per second from the top of a 30 meter high cliff, and it misses the cliff on the way back down. When will the rock be 10 meters from the water, below? Round your answer to two decimal places. I am not understanding how to ...

organic chemistry
What is the complete reaction mechanism for the reaction between butanone and methylamine (CH3NH2) with the reaction buffered at a pH of 3.5 and heated.

algebra
express 5/2 x (1/11 - 1/2) as a single fraction

algebra
Factor: 3x^2 + 5x - 2

Math
The numerator of a simple fraction is 2 less than its denominator. The sum of this fraction and its reciprocal is 2 4/35. Find this fraction.

Chemistry
A 495-mL sample of unknown HCl solution reacts completely with Na2CO3 to form 18.1g CO2. What was the concentration of the HCl solution?

Chemistry
What volume of 1.25M HCl in liters is needed to react completely (with nothing left over) with 0.750L of 0.300M Na2CO3?

S.S (DAMON)
How are natural disaster like hurriccanes and earthquake a threat to biodiversity? A. They destry natual habit

geometry
if the measurement of angle fgk is 3y-4 and measurement of angle kgh is 2y+7 find x

Geometry
Player hits the ball at point A an angle of 45 degrees on a pool table that measures 9’ by 4.5’. How many times will the bait a side of the table before going into a pocket?

Bus 311
1. Petra contracted to paint Bret’s house for $2,000. After beginning the job, Petra realizes that the house is really quite big, and she’s not going to make enough profit, so she tells Bret she wants another $500 to finish the job. Bret doesn’t want to pay ...

Business Law 311
#10- There is no contract - Merlin never made an offer

College Algebra
solve the polynomial inequality and graph on number line. express in set interval rotation. Show work x^3 - 3x^2 - 9x + 27 < 0

Stats
Which of the following statement is true? In testing the hypothesis for the equality of two population proportions, the acceptance region for the null hypothesis will be wider than the confidence interval for two population proportions, assuming the same value of alpha. A 95% ...

Accounting
Describe the mechanisms that WorldCom’s management used to transfer profit from other time periods to inflate the current period.

Physics
At t = 0, an automobile traveling north begins to take a turn. It follows one-quarter of the arc of the circle of radius 9.8 m until, at t = 1.38 sec, it is traveling east. The car does not alter its speed during the turn.

Chemistry
A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 5.8cm . Its mass is 1.5kg . Calculate the density of the metal.

Science
What effect does CRH have on the corticotrophs of the anterior pituitary?

STATISTICS
(a) With n=12 and p =0.4 find the binomial probability that p(9) by using a binomial probability table. (b) np ¡Ý5, nq¡Ü5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial, is np < 5 or nq &...

Statistics
(a) With n=12 and p =0.4 find the binomial probability that p(9) by using a binomial probability table. (b) np ¡Ý5, nq¡Ü5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial, is np < 5 or nq &...

Statistics
women's heights are normally distributed with a mean 63.1 in and standard deviation of 2.5. A social organization for tall people has a requirement that women must be at least 69in tall. What percentage of woman meet that requirement? The percentage of woman that are ...

Math
If you are dealt a 5-card hand from a standard deck of 52 playing cards, what is the probability (rounded to 6 decimal places) that you are dealt at least 4 hearts?

statistics
The sample mean for a recent introductory psychology test was 78, and the sample variance was 9. If a student received a score of 82, what was this student’s z-score?

Algebra
Find the equation with the given properties. Express the equation in slope intercept form. Containing points p=(-4,-2) and Q=(-2,1) What is the equation of the line? y=

math
Sorry The ratio of yellow paint to blue paint is 3 quarts to 2 quarts to make the color green to paint my bathroom. I need a total of 12 quarts of yellow paint?

math
The ratio of yellow paint to blue paint is 3 quarts to make the color green to paint my bathroom. I need a total of quarts of yellow paint. How many quarts of blue paints I need?

Use the intermediate value
Not sure that is why I asked :)

Use the intermediate value
Use the intermediate value theorem to show that the polynomial function has a zero in the given interval. f(x)=9x^4-3x^2+5x-1;[0,1]

Solve the inequality...
Solve the inequality x^2(9+x)(x-9)/(x+7)(x-5) is greater than or equal to 0?

College algebra
Form a polynomial f(x) with real coefficents having the given degree and zeros degree 5; zeros: 5; -i; -9 +i f(x)=a

Using the remainder
use the remainder theorem to find the remainder when f(x) is divided by x - 3. Then use the factor theorem to determine whether x-3 is a factor of f(x) f(x)=2x^3-10x^2+11x+12

Solve the inequality
Solve the inequality x^2(8+x)(x-9)/(x+4)(x-7) is greater than or equal to 0?

inequality
solve the inequality (x+8)^2(x-4) > 0

College algebra
Find the vertical, horizontal, and qblique asymptotes, if any, for the following rational function. T(x)=x^2/x^4-256

Algebra
Find the following function f(x)=(x+3)^2(x-1)^2 (a)Find the x and y intercept of the polynomial function f. (b) Determine whether the graph of the f crosses or touches the x-axis at each x intercept. (c) Put all the information to obtain the graph of f.

Algebra
Use completing the square to describe the graph of the following function. Support your answer. f(x)=-2x^2+4x+1

Algebra
Find the vertical, horizontal, and oblique asymptotes, if any, for the following rational function. T(x)=x^2/x^4-256

Algebra
Determine the quadratic function of f whose vertex is (2,-1) and passes through (3,1) f(x)=

Use completing the square to...
Use completing the square to describe the graph of the following function support your answer graphically. f(x)=-2x^2+4x+1

Quadratic function
Determine the quadratic function f whose graph is given. The vertex is (-3,-13) and the y-intercept is -4 f(x)=

math
I have an average of 66.67 i need a 70percent to pass the class, what do i need to get on thenext test?

math
I have an average of 66.67 i need a 70percent to pass the class, what do i need to get on thenext test?

Given the following rational function
Given the following rational function, find a) the horizontal asymptote(s), b) the vertical asymptote(s), if any, and c) the oblique asymptote(s), if any. F(x) = x^2-x-2/2x^2-x-2

Please help! quadratic equation
Given the following quadratic equation find. a) the vertex b) the axis of symmetry c) the intercepts d) the domain e) the range f) the interval where the function is increasing g) the interval where the function is decreasing h) graph the function y= -x^2-6x

Determine without graphing
I needed help learning how to find the value.

Determine without graphing
Determine without graphing, whether the given function has a maximum value and then find the value. f(x)=3x^2+30x-1

College algebra
Determine without graphing, whether the given function has a maximum value and then find the value. f(x)=3x^2+18x-6

College algebra!
For the linear function f(x) = 5x + 3 (a) Determine the slope and y-intercept (b) Use the slope and y-intercept to graph the linear function. (c) Determine the average rate of change of the function (d) Determine whether the linear function is increasing, decreasing, or constant.

College algebra
Answer the questions about the following functions. f(x) = 14^2/x^4 + 49 (a) Is the point (-sqrt 7,1) on the graph of f? (b) If x=1, what is f(x)? What point is on the graph of f? (c) If f(x)=1, what is x? what point(s) are on graph of f? (d)What is the domain of f? (e) list ...

Science help.
number 5 its wrong the correct answer is. (C)-produce vitamin d.

Algebra
If you bought 6 pears and 20 oranges and then bought 11 pears and 12 oranges and spent the same each time, how much do oranges cost if the pears are 80 cents each?

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