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January 26, 2015

January 26, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**Math**

) If you are standing near the edge of the top of a 200 ft. building and throw a ball vertically upward it will be modeled by the function 𝑠(𝑡) = −16𝑡2 + 64𝑡 + 200 where s(t) is the balls height above ground in feet and t is seconds after ...
*Thursday, December 4, 2014 at 6:36pm*

**Math**

A man is running around a circular track that is 200m in circumference. An observer uses a stopwatch to record the runner’s time at the end of each lap, obtaining the data in the tale below. a. What was the man’s average speed (rate) between 68 s and 152 s? b. What ...
*Thursday, December 4, 2014 at 6:35pm*

**Math calculous**

x 1 2 3 4 h(x) 7 20 43 76 x = 1 h(x) = 7 x = 2 h(x) = 20 x = 3 h(x) = 43 x = 4 h(x) = 76 Using the table or in this case information for the polynomial function of the degree 2 Find the formula for h(x) h(x) = ?
*Thursday, December 4, 2014 at 6:09pm*

**math**

f(x)=x^6-2x^4-81x^2+162;-3
*Thursday, December 4, 2014 at 6:09pm*

**Math**

How to find x intercept and y intercept
*Thursday, December 4, 2014 at 6:09pm*

**Math ( Percents as Ratios)**

Sue receives a test score of 75% on a test with 20 questions. How many did she get correct? 👉 I need help making these kinds of questions into proportions because I have a Benchmark Test (like a mid year test) coming up & I need to be able to set up these kind of ...
*Thursday, December 4, 2014 at 6:07pm*

**Math**

Lisa sells cookies and gets a business where she pays $100 a month. If each cookie is $2 and there are 30 people in the store each week, how much money does she make in a month? What's the y intercept
*Thursday, December 4, 2014 at 6:02pm*

**Math**

The ratio of corresponding sides of two similar triangles is 2:7. The sides of the smaller triangle are 16 centimeters, 22 centimeters and 28 centimeters long. What is the perimeter of the larger triangle?
*Thursday, December 4, 2014 at 5:58pm*

**Math**

How do you know if a word problem is Direct Variation or not
*Thursday, December 4, 2014 at 5:57pm*

**Math**

It cost 4$ to enter the fair.Each ride cost $2.50.You have $21.50.How many rides can you go on?
*Thursday, December 4, 2014 at 5:47pm*

**Math**

Write a linear equation that is not a direct variation in word problem form. I need help how to make one
*Thursday, December 4, 2014 at 5:46pm*

**Math**

1. Determine which ratio forms a proportion with 9/5 by finding a common multiplier. a. 54/30 b. 45/50 c. 45/40 d. 90/20 2. Determine which ratio forms a proportion with 15/8 by using cross products. a. 25/16 b. 30/12 c. 60/32 d. 75/32 3. Solve 3/27 = w/54 a. 2 b. 6 c. 9 d. 18...
*Thursday, December 4, 2014 at 5:27pm*

**Math**

Direction:Write each power as a product of the same factor. Ten find the value. 1. 3^5
*Thursday, December 4, 2014 at 5:21pm*

**Math**

θ equals the angle in Quadrant II so that cot θ= -3. Find the values for sin θ, cos θ, and tan θ.
*Thursday, December 4, 2014 at 5:20pm*

**Math Question**

Find the values of the six trigonometric functions of an angle in standard position where the terminal side is going through the point (-1, 1). Sinθ = Cosθ= Tanθ= Cscθ= Secθ= Cotθ=
*Thursday, December 4, 2014 at 5:19pm*

**Math**

A container holds 5 quarts when filled now it contains 3 3/4 quarts of water. How much more water must be added to fill the container
*Thursday, December 4, 2014 at 5:18pm*

**Simple math**

If Kristin buys gas at $2.69 per gallon, which includes all taxes, what percentage of the price is the state tax? What percentage is the federal tax The state tax is .8 and federal tax is .18. So would I multiply each by the total amount the gas cost?
*Thursday, December 4, 2014 at 4:52pm*

**Math **

Given that x<5, rewrite 5x- (x-5) without using the absolute value signs. The () are absolute value signs.
*Thursday, December 4, 2014 at 3:11pm*

**Math **

Solve for the positive value of x such that 3sqrt(x^2-4x+4)=16. The 3 is the small number next to the sqrt sign.
*Thursday, December 4, 2014 at 3:09pm*

**Math**

Express the product x^2+4x/2x^2+13x+15 x x+5/x^2-16 in simplest form. a)- 1/2x+3 b)x/(2x-16)(x+4) c)(x^2+4x)(x+5)/(2x^2+13x+15)(x^2-16) d)x/(2x-3)(x-4)
*Thursday, December 4, 2014 at 2:03pm*

**6th grade math**

the sum of twelve divided by twice a number
*Thursday, December 4, 2014 at 1:58pm*

**Math**

I have got help from Damon on this question but all I need is help on integrating the answer he gave me into my original equation: y=-15/20.25(x+1.5)^2+0 Here's Damon's help: (x+1.5)(x+1.5) = x^2 + 1.5 x + 1.5 x + (1.5*1.5) = x^2 + 3 x + 2.25 So how would I put this ...
*Thursday, December 4, 2014 at 1:51pm*

**Math**

have got help from Damon on this question but all I need is help on integrating the answer he gave me into my original equation: y=-15/20.25(x+1.5)^2+0 Here's Damon's help: (x+1.5)(x+1.5) = x^2 + 1.5 x + 1.5 x + (1.5*1.5) = x^2 + 3 x + 2.25 So would I put this into my ...
*Thursday, December 4, 2014 at 1:35pm*

**Math**

A savings account with a current balance of $5,000 earns 2.75% annual interest, compounded continuously. To the nearest dollar, what will be the account balance in 10 years?
*Thursday, December 4, 2014 at 1:31pm*

**Math**

I have got help from Damon on this question but all I need is help on integrating the answer he gave me into my original equation: y=-15/20.25(x+1.5)^2+0 Here's Damon's help: (x+1.5)(x+1.5) = x^2 + 1.5 x + 1.5 x + (1.5*1.5) = x^2 + 3 x + 2.25 So would I put this into ...
*Thursday, December 4, 2014 at 1:28pm*

**math **

write the following square root in form a root b where a and b are intergers and b has the least value possible . root 45=
*Thursday, December 4, 2014 at 1:10pm*

**Math**

My math teacher said to use the FOIL (First Outer Inner Last) property to simplify these quadratic equations I have made from looking at two parabolas. Here are my equations & how would you use the FOIL property on each of the equations and also can someone help me with ...
*Thursday, December 4, 2014 at 1:06pm*

**Math**

How would I simplify these two equations I have made up from looking at parabolas: y=-15/20.25(x+1.5)^2+0 y=a(x+2)^2+1.5
*Thursday, December 4, 2014 at 12:57pm*

**Math**

The area of a rectangular field is 96m2. The length of one side is12m. The farmer needs to know its perimeter to work out how much fencing will be needed.
*Thursday, December 4, 2014 at 12:36pm*

**Math**

A length of rope is stretched between the top edge of a building and a stake in the ground. The head of the stake is at ground level. The rope also touches a tree that is growing halfway between the stake and the building. If the tree is 38 feet tall, how tall is the building...
*Thursday, December 4, 2014 at 12:35pm*

**Math**

A golf ball is hit off the top of a cliff that is 75 feet tall at an angle of 45° to the horizontal with an initial velocity of 80 feet per second. The quadratic equation shown below models the height, h(x), of the ball when it is x feet from the cliff’s edge. How far...
*Thursday, December 4, 2014 at 12:22pm*

**math**

Allie noticed that to get her test grade, she could take Valerie's grade, multiply it by 2 and subtract 15. If Valerie's test grade was x, how would you write Allie's test grade?
*Thursday, December 4, 2014 at 12:14pm*

**5th grade math **

how do i round and divide whith decimals?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
*Thursday, December 4, 2014 at 10:03am*

**5th grade math **

how do i simplify
*Thursday, December 4, 2014 at 10:02am*

**5th grade math**

there is a gameboard and the arrow has landed on seven.what is the probability of spinning a number larger than 6 on the spinner?
*Thursday, December 4, 2014 at 10:00am*

**math 3**

The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information: $231,500 $279,900 $...
*Thursday, December 4, 2014 at 8:00am*

**math**

Determine all numbers in between 10 and 200 where 'n' is a prime and (n-1) is a perfect square.
*Thursday, December 4, 2014 at 7:56am*

**math **

which equation is the equation of a line that passes through (-10,3) and is perpendicular to y=5x-7?
*Thursday, December 4, 2014 at 2:18am*

**math **

Describe a situation in which it is better to round a mixed number up to the next whole number even if the fraction in the mixed number is closer to 1/2 than 1?
*Thursday, December 4, 2014 at 12:04am*

**math**

325 x .0145 =
*Wednesday, December 3, 2014 at 11:39pm*

**math**

(1.45) 325 x .0145 =
*Wednesday, December 3, 2014 at 11:37pm*

**Math Help**

Find the percent of increase. 50 to 70 A. 20% B. 30% C. 40% D. 50% Is the answer A?
*Wednesday, December 3, 2014 at 11:29pm*

**Math **

Evaluate log sqrt(5) 125sqrt(5).
*Wednesday, December 3, 2014 at 11:26pm*

**Math **

Find all solutions to the equation sqrt(2-3x)= 9. Express your answer as a common fraction. I squared both sides and I got 4-9z^2=81 and then -9z^2=77 then I divided both sides by -9 and now I am stuck, I know I can square root both sides. But I think something went wrong.
*Wednesday, December 3, 2014 at 11:25pm*

**Math: Reiny **

I already posted this question, and Reiny had a question about the question. How many square units are in the region satisfying the inequalities y>=(x) and y<=-(x)+3? Express your answer as a decimal. * the () are absolute value signs. •Math - Reiny, Wednesday, ...
*Wednesday, December 3, 2014 at 11:21pm*

**math**

a farmer has 120 m of fencing to make two identical rectangular enclosures using an existing wall as one side of each enclosure. The dimensions of each closure are x metres and y metres as shown. Obtain and expression in terms of x only for the total area of two enclosures, ...
*Wednesday, December 3, 2014 at 11:19pm*

**math**

A book store bought 160 copies of a book for $4,000. How much money will they loose if they give away 2 books. show in ratio table form. Every book costs $25 so the store would loose $50 but how do you put that in a ratio table?
*Wednesday, December 3, 2014 at 10:18pm*

**math**

Find the area of the region in the first quadrant that is below the parametric curve? the parametric curves are x = t^3 + 6t y = 4t - t^2 any help would be greatly appreciated. Thanks!
*Wednesday, December 3, 2014 at 10:15pm*

**Math **

Challenge 1: Compute log1/4 (32^-18). The 1/4 is the small number under the log.
*Wednesday, December 3, 2014 at 10:14pm*

**Math **

Find x, such that log (64)1/3) 4^x=1 The 64 and 1/3 are the small numbers under log.
*Wednesday, December 3, 2014 at 10:12pm*

**Math **

The square root of h is greater than 10/3 and less than 24/5. How many integer values of h satisfy this condition? I think the first step would be to square each fraction so 100/9 and 576/25 and then see which whole numbers are between. Am I on the right track?
*Wednesday, December 3, 2014 at 10:09pm*

**math**

If 18g of a radioactive substance are present initially and 5 yr later only 9g remains, how much of the substance will be present after 11yr?
*Wednesday, December 3, 2014 at 10:08pm*

**Math **

How many square units are in the region satisfying the inequalities y>=(x) and y<=-(x)+3? Express your answer as a decimal. * the () are absolute value signs.
*Wednesday, December 3, 2014 at 10:07pm*

**Math Help**

Use an equation to solve the problem. 224 is 25% of what number? A. 224*0.25=w;560 B. 224=0.25*w;896 C. 224*0.25=w;56 D. 224=0.25*w;90 Is the answer C?
*Wednesday, December 3, 2014 at 10:03pm*

**Math**

Real, Rational, Irrational, Integer, Whole, Natural 35.99 Real Ratio
*Wednesday, December 3, 2014 at 9:59pm*

**Math Help**

Use an equation to solve the problem. What is 57% of 11? A. 11=0.57*n; 19.3 B. n=57*11;627 C. n=0.57*11;6.27 D. 11=57*n;0.19 Is the answer C?
*Wednesday, December 3, 2014 at 9:54pm*

**math**

A photographer charge 20 dollars for 8x10 plus sitting fee. If 55 dollars was total for 2 photos and sitting fee. Assume the relationship is linear. Find and interpret the rate of change and intial value.
*Wednesday, December 3, 2014 at 9:47pm*

**Math 120**

Write 4logb(X)-1/3logb(y)+2logb(z)as a single logarithm Its log base b.
*Wednesday, December 3, 2014 at 9:37pm*

**math - pls check!!!**

29) 4k - 1 >= -3 30) 6(c - 1) < -18 31) 3t > 5t + 12 32) -6/7y - 6 >= 42 33) 4 + x/2 > 2x 34) 3x + 5 <= 2x -8 35) 13.5a + 7.4 <= 85.7 36) 42w > 2(w +7) ANSWERS: 29) k >= -2 30) c < -12 31) t < -6 32) y <= -56 33) x < 8/3 34) x <= -13 ...
*Wednesday, December 3, 2014 at 9:34pm*

**Math**

Expand and simplify (p+3)(p-7)
*Wednesday, December 3, 2014 at 9:19pm*

**Math**

Sr. John and his wife went to a party where four other married couples were present. Every person shook hands whit everyone he or she was no acquainted with. When the handshaking was over , Sir John asked everyone how many hands they shook. Sir. John was surprised when he got ...
*Wednesday, December 3, 2014 at 9:13pm*

**Math**

In the middle pond is a patch of moss. The moss doubles in size every day. After exactly 20 days the complete pond will be covered by moss. After how many days will half of the pond be covered by the moss ?
*Wednesday, December 3, 2014 at 9:09pm*

**Math**

Here men were invited to lunch one day. The host places them in a line on three chairs. The men are positioned in such as way that Man #3 can see both Man #1 and Man #2 , Man #2 can see only Man # 1 , and Man #1 can see none of the other men. The host then show each man 5 ...
*Wednesday, December 3, 2014 at 9:06pm*

**Math**

Once there four boys who wanted to cross a street. They were all on the same side. It was night time and they only had one flashlight between them. Only two boys can cross the street at a time, and anyone who crosses , either one or two people, must always have a flashlight ...
*Wednesday, December 3, 2014 at 8:57pm*

**MAth**

Real, Rational, Irrational, Integer, Whole, Natural 4 1/8 Rational Real
*Wednesday, December 3, 2014 at 8:53pm*

**Math**

Writing with exponents 2x2x2
*Wednesday, December 3, 2014 at 8:48pm*

**Math**

how many fractions between 1/4 and 1/2
*Wednesday, December 3, 2014 at 8:30pm*

** Math**

Compute Adela's estimated tax payment for the second quarter. She is self employed and she expects to earn $93,440 this year. Her estimated income tax rate is 25%. For self employed persons, social security tax is 12.4% of wages up to $106,800, and Medicare tax is 2.9% of ...
*Wednesday, December 3, 2014 at 8:30pm*

**math**

taryn and alastair both mow lawns. Each charges a flat fee to mow a lawn. The table shows the number of lawns in the past week, the time spent mowing lawns and the money earned. Taryn mowed 9 lawns. She spent 7.5 hrs mowing lawns. Taryn earned $112.50 Alastair mowed 7 lawns. ...
*Wednesday, December 3, 2014 at 8:24pm*

**Math**

Whats 9 + 10
*Wednesday, December 3, 2014 at 8:22pm*

**Math**

A fishing boat leaves port at 5 miles per hour at a bearing of 350∘ for 2 hours, then turns to a bearing of 40∘ at 12 miles per hour for 2 hours, and finally changes to a bearing of 180∘ at 10 miles per hour for 5 hours. At this point, the boat heads directly...
*Wednesday, December 3, 2014 at 8:21pm*

**math**

delias family car weight 2 tons. how many ounces does the car weight?
*Wednesday, December 3, 2014 at 8:12pm*

**Math**

Is 3.87655 a rational number
*Wednesday, December 3, 2014 at 8:10pm*

**Math**

When a number is a multiple of 6, what are the possible values for the ones digit?
*Wednesday, December 3, 2014 at 8:00pm*

**Business Math**

Kristy has bi-weekly gross earnings of $1,750. What were her total social security and Medicare tax with holdings for a whole year?
*Wednesday, December 3, 2014 at 7:58pm*

**Math**

Name ALL sets of numbers to which each number belongs Real Rational Irrational Integer Whole Natural 0 Whole Integer Square root of 5 Irrational -80 Integer 12/3 Rational square root of 100 Irrational square root of 4 Irrational 3pi Irrational
*Wednesday, December 3, 2014 at 7:48pm*

**Math**

Using the data from the set included, what is the minimum number of 4's that must be added to make 6 an outlier? Data Values:-3,-1,1,3,4,5,6,7,9 Frequency: 34,6,12,4,7+x,1,20,3,12 Cumulative Frequency: 34,40,52,56,63+x, 64+x,84+x,87+x,99+x This is not for homework, it is ...
*Wednesday, December 3, 2014 at 7:45pm*

**Math**

Suzan needs a bored that is at least 3.5 meters long and I have a 17 centimeter books is that enough
*Wednesday, December 3, 2014 at 7:15pm*

**math**

The ratio of an object's weight on Earth to its weight on Neptune is 5 : 7. How much would a person who weighs 150 pounds on Earth weigh on Neptune?
*Wednesday, December 3, 2014 at 6:28pm*

**Math fraction**

2/7=_/21
*Wednesday, December 3, 2014 at 6:22pm*

**Math**

Name ALL sets of numbers to which each number belongs Real, Rational, Irrational, Integer, Whole, Natural -5/6
*Wednesday, December 3, 2014 at 6:09pm*

**math**

Q. What's 463 divided by 16? A. 8??
*Wednesday, December 3, 2014 at 6:00pm*

**Math **

Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls. In 1990, the concentration of calcium in precipitation in a certain area was 0.11 milligrams per liter (mg/L). A random sample of 10 precipitation dates in 2007 results in ...
*Wednesday, December 3, 2014 at 5:58pm*

**Math please help**

According to a study conducted by a statistical organization, the proportion of americans who are satisfied with the way things are going in their lives is 0.82. Suppose that a random sample of 105 Americans is obtained. (Please answer the below and round to four decimals ...
*Wednesday, December 3, 2014 at 5:57pm*

**6th grade Math**

Abraham earns $11.50 an hour. How many hours will Abraham have to work to earn $483? Please Show Work!!!!
*Wednesday, December 3, 2014 at 4:58pm*

**Math **

How do you put 28/4 in a whole number
*Wednesday, December 3, 2014 at 4:54pm*

**math**

I need help with Lesson 4 Unit 3
*Wednesday, December 3, 2014 at 4:31pm*

**math**

At Soap ans Suds there are 16 washing machines in a single row with no space between each one.Each washing mashine is 2 feet 5 inches across. What is the total length of the 16 washing machines?
*Wednesday, December 3, 2014 at 4:30pm*

**math**

x^2-20=0
*Wednesday, December 3, 2014 at 4:19pm*

**math **

The area of a circle with radius r given by the formula A = pi r^2. If a circle has area 81 pi square in inches, what is the radius?
*Wednesday, December 3, 2014 at 4:05pm*

**Math check my answer please!**

Which expression is equivalent to 4x4x4x4x4x4x4x4? a. 4 x 8 b. 8^4 c. 8x8 d. 4^8 I think D.
*Wednesday, December 3, 2014 at 2:30pm*

**Math**

There are four kinds of road signs in a certain town. The number of each kind is shown. What is the ratio of the number of school signs to the number of stop signs?
*Wednesday, December 3, 2014 at 2:25pm*

**Math**

an employee is hired at a salary of $38560.25 which is 5.5% higher than her salary at her previous job. what was her previous salary?
*Wednesday, December 3, 2014 at 1:33pm*

**2 math ?s**

Thank you so much in advance! Verify each identity. Work one side (the harder side) Please show me the work sin θ +cos θ cot θ= csc θ Cos^2 θ + 1 =2cos^2 θ +sin^2 θ
*Wednesday, December 3, 2014 at 11:06am*

**3 Math**

If you know That 4 x5= 20, how can you use the commutative property to find 5x4= 20 ?
*Wednesday, December 3, 2014 at 10:55am*

**DUMB MATH**

How the heck do I do this: I am z. To find me, multiply b by 3,then subtract 7. HELLLLPPPPPPP!
*Wednesday, December 3, 2014 at 9:53am*

**math**

Daniel scored 162 points playing his video game.he can move to the next level of the game when he earns 275 points exactly. daniel says he needs about 100 points to get to the next level his friend Valerie says he needs about a 120 points to get to the next level explain why ...
*Wednesday, December 3, 2014 at 9:46am*

**math**

bianca has total of 25c.She has some nickels and pennies.How many different combination of nickels and pennies could bianca have?
*Wednesday, December 3, 2014 at 6:54am*

**Business Math**

Check My Work (7 remaining) What payment should be made on an invoice in the amount of $3,400 dated August 7 if the terms of sale are 3/15, 2/30, n/45 and the bill is paid on ... a. ... August 19? $ b. ... September 3? $
*Wednesday, December 3, 2014 at 5:01am*

**math**

3. In a class of 40 boys, 18 passed Business Mathematics, 19 passed Accounts, 10 passed Economics, 6 passed Accounts only, 5 passed Business Mathematics and Accounts only, 2 Passed Accounts and Economics only. How many passed in all three papers.
*Wednesday, December 3, 2014 at 2:29am*

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