Thursday

April 17, 2014

April 17, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

a^2 + b^2 = c^2 8^2 + b^2 = 10^2 64 + b^2 = 100 b^2 = 36 b = 6 The ladder reaches 8 feet.
*Saturday, March 15, 2014 at 11:10pm*

**MATH 104**

Last semester, a certain professor gave 24 As out of 244 grades. If one of the professor's students from last semester were selected randomly, what is the probability that student received an A? (Assume that each student receives a grade.)
*Saturday, March 15, 2014 at 11:04pm*

**math**

A 10 foot ladder is placed against a vertical wall of a building, with the bottom of the ladder standing on level ground 8 feet from the base of the building. How high up the wall does the ladder reach.
*Saturday, March 15, 2014 at 11:01pm*

**math**

the number of tickets sold each day for an upcoming performance is given by N(x)=-0.5x^2+13x+15 where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold that day? Ticket sales peak ___ days after ...
*Saturday, March 15, 2014 at 10:56pm*

**Math**

width = x length = y kitchen is 10 by x dining room is square so (y-10) = x kitchen area = 10 x dining area = x^2 so 10 x + x^2 = 264 x^2 + 10 x - 264 = 0 (x-12)(x+22) = 0 x = 12 y = x+10 = 22 so living room is 12 by 12 length is 22
*Saturday, March 15, 2014 at 9:55pm*

**math**

could be a very nasty equation but .... 3^x + 4^x = 5^x by inspection and recall, I know that 3^2 + 4^2 = 5^2 (did you recognize the 3-4-5 right-angled triangle) so x = 2 now suppose it had been 3^x + 4^x = 6^x look at Wolfram's solution http://www.wolframalpha.com/input/?...
*Saturday, March 15, 2014 at 9:46pm*

**math**

-7.2 – (-3.8) -7.2 + 3.8 = -3.4
*Saturday, March 15, 2014 at 9:45pm*

**math**

Solve: -7.2 – (-3.8)
*Saturday, March 15, 2014 at 9:40pm*

**Math help plz check my answers!**

Surface area of a square pyramid usually just adds up the surface area of the 4 isosceles triangles, not including the base one of them: base = 11 hypotenuse = 15 height^2 + 5.5^2 = 15^2 height^2 = 194.75 height = √194.75 area of one of them = (1/2)(11)√194.75 = ...
*Saturday, March 15, 2014 at 9:39pm*

**Math**

An architect has allocated a rectangular space of 264ft^2 for a square dining room and a 10ft wide kitchen. What is both the width of the square dining room and the length of entire space.
*Saturday, March 15, 2014 at 9:12pm*

**math**

The distance versus time plot for a particular object shows a quadratic relationship. Which column of distance data is possible for this situation?
*Saturday, March 15, 2014 at 8:11pm*

**math**

Given that 3^x + 4^x =5^x. Solve for x
*Saturday, March 15, 2014 at 8:05pm*

**Math help plz check my answers!**

Find the surface area of a square pyramid with a base length of 11 cm and a slant height of 15 cm. 472 cm2 451 cm2*** 781 cm2 330 cm2 Find the volume of a rectangular prism with the following dimensions: Length = 5 mm Base = 7 mm Height = 3 mm 142 mm3 *** 105 mm3 126 mm3 130 mm3
*Saturday, March 15, 2014 at 7:40pm*

**I really need help**

Here are some of the formulas. http://math.about.com/od/formulas/ss/surfaceareavol_2.htm
*Saturday, March 15, 2014 at 7:24pm*

**math**

Find the volume of a cone with a radius of 10 mm and a height of 6 mm. 628 mm3 600 mm3 1,884 mm3 1,254 mm3 Find the surface area of a square pyramid with a base length of 11 cm and a slant height of 15 cm. 472 cm2 451 cm2 781 cm2 330 cm2 Find the volume of a rectangular prism ...
*Saturday, March 15, 2014 at 6:20pm*

**math**

Thxs Steve :)
*Saturday, March 15, 2014 at 6:15pm*

**math**

cone: ok pyramid: v = 1/3 Bh = 1/3 * 81 * 4 = 108 B is the area of the base, not the side length
*Saturday, March 15, 2014 at 6:02pm*

**math**

Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for π and round to the nearest whole number. 439 ft2 324 ft2 572 ft2 286 ft2*** Find the volume of a square pyramid with a base length of 9 cm and a height of 4 cm. 324 cm3 108 ...
*Saturday, March 15, 2014 at 5:52pm*

**Math plz help me!!! URGENT!!**

Hey connxus person /)
*Saturday, March 15, 2014 at 5:36pm*

**Math**

1C 40 people will or might attend 2A 285/3.75 = 76 jumps/min
*Saturday, March 15, 2014 at 5:00pm*

**math**

did that one for you, look for your previous post
*Saturday, March 15, 2014 at 4:47pm*

**math**

Thanks everyone for the help
*Saturday, March 15, 2014 at 4:45pm*

**math**

looks like a lot of nonsense and mathematical gibberish.
*Saturday, March 15, 2014 at 4:40pm*

**math**

all lines of the type y = (-3/2)x + b , where b is any real number would be perpendicular to your given line Where there any choices? so just make sure the answer starts with y = (-3/2)x ...
*Saturday, March 15, 2014 at 4:34pm*

**math**

let the original cost of one shirt be x so three shirts cost 3x reduced by 30% leaves you with .7(3x) .7(3x) = 63 2.1x = 63 x = 63/2.1 = 30 Just noticed this same question was asked last year. http://www.jiskha.com/display.cgi?id=1361331485 Now you have 3 different ...
*Saturday, March 15, 2014 at 4:31pm*

**math**

0.7x = 63 x = 90 90 / 3 = 30
*Saturday, March 15, 2014 at 4:30pm*

**math**

You're welcome.
*Saturday, March 15, 2014 at 4:27pm*

**math**

What is 8/9 - 3/5 ?
*Saturday, March 15, 2014 at 4:26pm*

**Gr 11 - math linear systems**

(10-2)x - 2000 = $16,000 8x - 2000 = 16000 8x = 18000 X = 2,250 Tickets.
*Saturday, March 15, 2014 at 4:18pm*

**math**

got it . Thank you
*Saturday, March 15, 2014 at 4:05pm*

**Math**

The circumference of a pond is 942 feet.A model boat is moving alot the pond, at a rate of 4 feet per second.How long does it take to get to the other side?
*Saturday, March 15, 2014 at 3:54pm*

**math**

Center C has a radius of 13.Chord AB=10. Find the distance from the center of the circle to chord AB. CD=?
*Saturday, March 15, 2014 at 3:50pm*

**math**

Suppose you try to solve a system of linear equations using substitution and get this result. 1. x=-2 2. y=12 3. 6=x 4. -8=-8 5. 7=y 8. 5=3
*Saturday, March 15, 2014 at 3:50pm*

**math**

Divide: 24/60 = ? Multiply your answer by 100 to get the percentage.
*Saturday, March 15, 2014 at 3:44pm*

**math**

y=-3x/2+13/2
*Saturday, March 15, 2014 at 3:32pm*

**math**

which line is perpendicular to the line y=2/3x+3
*Saturday, March 15, 2014 at 3:30pm*

**math (cant figure it out)**

thank you guys I figured it out! and especially to Chelle (:.
*Saturday, March 15, 2014 at 3:11pm*

**math **

Pete saved 24.00 of the 60 .oo dollars he earned. What percentage of his earnings did he save ?
*Saturday, March 15, 2014 at 3:00pm*

**math **

John bought 3 of the same shirt and paid 63.00 after the 30% discount.What was the original price of one of the shirts ? Not sure at all how to do this. Thank you
*Saturday, March 15, 2014 at 2:49pm*

**math**

how do I calculate what is left over if 3/5 of a casserole from 8/9 of a casserole?
*Saturday, March 15, 2014 at 2:33pm*

**Math**

1 Catriona is deciding how large of a cake to order for a party. She can choose from a 1-layer cake that serves 10 people, a 2-layer cake that serves 20 people, a 3-layer cake that serves 40 people, or a 4-layer cake that serves 65 people. The cost of the cake increases with ...
*Saturday, March 15, 2014 at 2:14pm*

**math**

(a-b):(a+b):ab = 1:4:15 (a-b)/(a+b) = 1/4 4a-4b = a+b 3a = 5b (a-b)/ab = 1/15 15a-15b = ab 15a-9a = a(3a/5) 30a = 3a^2 a = √10 b = 3/5 √10 15a+15b = 4ab 15a + 9a = 4a(3a/5) 120a = 12a^2 a = √10 a-b = 2/5 √10 a+b = 8/5 √10 ab = 6 = 30 * 2/5 √...
*Saturday, March 15, 2014 at 12:06pm*

**math**

apparently 2x+3x+4x = 25+70+49 9x = 144 x = 16 So, A:B:C = 32:48:64 Now figure the shortfalls.
*Saturday, March 15, 2014 at 11:53am*

**math **

Three men, A, B and C agree to share the expense of a fishing expedition in the ratio 2:3:4. A pays $25 for the hire of the boat, B pays $70 for the meal and C pays $49 for traveling expenses. How much must A and C pay B to settle their agreed shares?
*Saturday, March 15, 2014 at 11:13am*

**math**

Two numbers are such that their difference, their sum, and their product are in the ratio 1 : 4 : 15. What are the two numbers?
*Saturday, March 15, 2014 at 11:04am*

**Math**

sorry; that's the angle between the diagonal and a side of the rectangle. so, draw a diagram, and the angle you want is Ø, where 2θ+Ø = 180
*Saturday, March 15, 2014 at 5:59am*

**Math**

tanθ = 130/170 or, for the other angle, tanθ = 170/130
*Saturday, March 15, 2014 at 5:57am*

**math**

3log+6
*Saturday, March 15, 2014 at 5:34am*

**math (cant figure it out)**

Explanation r = d / 2 d = 2 r For that reason A = d * pi * ( d / 2 + h ) = 2 * r * pi * ( r + h )
*Saturday, March 15, 2014 at 2:38am*

**math (cant figure it out)**

Surface Area A = 2•pi•r^2 + 2•pi•r•h The radius is half the diameter 2(3.14)3^2 + 2(3.14)3•20 56.52 + 376.8 = 433.32 A = 433cm
*Saturday, March 15, 2014 at 2:36am*

**math (cant figure it out)**

Area of a circle = d ^ 2 * pi / 4 Circumference of a circle = d * pi Area of a rectangle = Circumference * height = d * pi * h Area of a cylinder = 2 * Area of a circle + Area of a rectangle A = 2 * d ^ 2 * pi / 4 + d * pi * h So : A = 2 * d ^ 2 * pi / 4 + d * pi * h = d ^ 2...
*Saturday, March 15, 2014 at 2:34am*

**math**

Cost: $200 Selling Price: $275 275/200 = 1.375 Move decimal two places to right: 137.5 Or, Multiply by 100: 1.375 x 100 = 137.5 Next, subtract 100 from 137.5 137.5 - 100 = 37.5% Or, you can just subtract the cost from the selling price then divide answer by cost. Then move ...
*Saturday, March 15, 2014 at 2:07am*

**Math**

A rectangle has sides 170mm and 130mm.What is the angle between the diagonals?
*Saturday, March 15, 2014 at 1:46am*

**math**

If a store owner buys a microwave for $200 and sells it for $275. What is the percent markup based on cost?
*Saturday, March 15, 2014 at 12:43am*

**math (cant figure it out)**

How to find the surface area of a cylinder with a diameter of 6ft and a height of 20cm using 3.14 rounded to the nearest whole number. (I cant figure it out my book doesn't give an example of it just a radius formula and ive tried searching the formula but i cant find any ...
*Saturday, March 15, 2014 at 12:25am*

**math**

2. Shifted 5units down. 5. -7x^2 + 6x + 3 = 0 Use Quadratic formula and get 2 solutions : -0.354, and 1.211. 6. Y = 3x^2 + 18x + 27 = 0 x^2 * 6x + 9 = 0 (x+3)(x+3) = 0 x+3 = 0, x = -3. x+3 = 0, X = -3. 2 solutions : -3, and -3. 11. Use Quad. Formula and get 3.54 s. 12. V = Vo...
*Friday, March 14, 2014 at 10:31pm*

**math**

A & B Antiques issued the following bonds: Date of issue and sale: April 1, 20-1 Principal amount: $430,000 Sale price of bonds: 100 Denomination of bonds: $1,000 Life of bonds: 10 years Stated rate: 8%, payable semiannually on September 30 and March 31 Prepare journal entries...
*Friday, March 14, 2014 at 10:05pm*

**Math**

75% of 60 is 45. so, which option is not equal 45 that one is wrong.
*Friday, March 14, 2014 at 9:50pm*

**math**

You're welcome, Pat.
*Friday, March 14, 2014 at 9:10pm*

**Math, Please Help!**

he has n/3 + 2 he wants 3n - 2 to get the 3n, he needs to multiply by 9. That will give him 3n+18 So, then he needs to subtract 20.
*Friday, March 14, 2014 at 9:02pm*

**math**

Three pumps begin draining a 7500-gallon pool. At the same time, two pumps begin to drain a 4800-gallon pool. Assuming that all pumps drain at the same time., how many gallons are left in the larger pool when the smaller pool finished being drained? (a) 300 (b) 600 (c) 900 (d...
*Friday, March 14, 2014 at 9:00pm*

**math**

Thanks Ms. Sue
*Friday, March 14, 2014 at 8:57pm*

**math**

Cross multiply and solve for x. 5/4 = 360/x
*Friday, March 14, 2014 at 8:50pm*

**math**

There is a 5 to 4 ratio of women to men at the game. If there are 360 women , how many men are at the game (a) 256 (b) 275 (c) 288 (d) 305
*Friday, March 14, 2014 at 8:48pm*

**Math**

employees earns x manager earns 1.4 x x/1.4 x = 1/1.4 = 10/14 = 5/7
*Friday, March 14, 2014 at 8:40pm*

**Math**

At an office, the manager earns 40% more than a first year employee. The employee earns what fraction of the manager earnings? (a) 1/4 (b) 3/4 (c) 5/7 (d) 4/5
*Friday, March 14, 2014 at 8:35pm*

**math**

I = PRT 960 =4000(R)(3) solve for R (I got 8%)
*Friday, March 14, 2014 at 7:43pm*

**math**

from the given: term(3) = ar^2 = 28 term(4) = ar^3 = -56 so ar^3/(ar^2) = -56/28 r = -2 then in ar^2 = 28 a(4) = 28 a = 7 sum(6) = a(r^6 - 1)/(r-1) = 7((-2)^6 - 1)/(-2-1) = 7(63/-3) = -147 check: GP is 7, -14 , 28 , - 56 , 112, - 224 sum of that is -147
*Friday, March 14, 2014 at 7:42pm*

**math-Algebra**

Anonymous: Your answer is INCORRECT. The correct formula is: k=xy k= 8*10 k=80 y=80/x y=80/6 simplify the fraction to y=40/3. I am a homeschool teacher.
*Friday, March 14, 2014 at 7:41pm*

**THIS IS FOR MATH AND SCIENCE TUTORS**

HAPPY PI DAY! A mathematician, a physicist, and an engineer are all given identicalrubber balls and told to find the volume. They are given anything theywant to measure it, and have all the time they need. The mathematician pulls out a measuring tape and records the ...
*Friday, March 14, 2014 at 7:34pm*

**Happy Pi Day**

From the article: "The Illinois Science Council and Fleet Feet Sports are hosting a 3.14-mile walk/run Friday night, ." It is ironic that the state of Illinois actually introduced a bill , the notorious #246, which attempted to declare the value of π to be 3. ...
*Friday, March 14, 2014 at 7:22pm*

**Math**

You're right; C is wrong. Jacob/Toni/Jocab -- please use the same name for your posts.
*Friday, March 14, 2014 at 6:43pm*

**Math**

45 so that would not be correct.
*Friday, March 14, 2014 at 6:39pm*

**Math**

What is 60/20? What is 60/20 * 15?
*Friday, March 14, 2014 at 6:25pm*

**Math**

I think I'm in agreement with Toni, what do you think Ms.Sue?
*Friday, March 14, 2014 at 6:24pm*

**Math**

So would it be C. 60 × 15 20
*Friday, March 14, 2014 at 6:23pm*

**Math, Please Help!**

Ned divided a given number by 3 and then added 2. If he should have multiplied the number by 3 and then subtracted 2, which of the following two steps can he do next to get the correct answer? Subtract 4 and then multiply by 9. Subtract 12 and then multiply by 3. Multiply by 3...
*Friday, March 14, 2014 at 6:20pm*

**Math**

75% of 60 = 0.75 * 60 = 45 60/4 * 3 = 15 * 3 = 45 E is not the right answer.
*Friday, March 14, 2014 at 6:14pm*

**Math**

Im think E
*Friday, March 14, 2014 at 6:09pm*

**Math**

Each of the following is equivalent to 75% of 60 EXCEPT A. 0.75 × 60 B. 0.6 × 75 C. 60 × 15 20 D. 75 × 6 100 E. 60 × 3 4
*Friday, March 14, 2014 at 6:08pm*

**math**

Well, that's no help...
*Friday, March 14, 2014 at 5:50pm*

**math**

i put 4000.00 in savings. at end of 3 years the account earned 960.00 in simple interest at what simple interest rate did the account grow? please show me the work.
*Friday, March 14, 2014 at 5:33pm*

**4th grade math**

3/5 is taken away 2 is left that is my answer from mia igoe
*Friday, March 14, 2014 at 5:08pm*

**4th grade math**

3/5 is taken away 2 is left
*Friday, March 14, 2014 at 5:07pm*

**Math**

How would you like us to help you with this assignment?
*Friday, March 14, 2014 at 5:05pm*

**Happy Pi Day**

http://www.cnn.com/2014/03/14/tech/innovation/pi-day-math-celebrations/
*Friday, March 14, 2014 at 5:04pm*

**Math**

In the Math Virtually Everywhere project you completed for this module, you learned all about cell phone plans. The best cell phone plan for a customer can vary based on how much they plan to talk. The plan that is the best deal for one customer may not be the best deal for ...
*Friday, March 14, 2014 at 5:01pm*

**math**

A G.P has 6 terms. If the 3rd and 4th term are 28 and -56 respectively find common ratio, first term and the sum of the G.P.
*Friday, March 14, 2014 at 4:47pm*

**math**

Looks good!
*Friday, March 14, 2014 at 4:06pm*

**calculus**

I am a Math !@#$%^&.
*Friday, March 14, 2014 at 3:18pm*

**how many ways can we make 35 In math**

I dongpirh1urghpqg4 together j2q4yebwh owrh 92r9iqj9i2rngp i2rgnkp2rqmgkp 2ngk p2rngkwrjgqpkwrnkgp3tntbkpnq3kvpmt3pkm3tgopm3tpn pnw wigegjpit3gn p3tgm3pbtqnqgebpkbetqpknbp in3to pj3tbopegbklpegblgbekmgeb kpmegb Qnegbkpmgekpegqmkegpbmegegwomobgp3jw3gbo...
*Friday, March 14, 2014 at 1:38pm*

**math**

You won't find any diagrams here, but division is just a shorthand way to subtract. 2.6/.4 tells you how many times you can subtract .4 from 2.6 without passing zero. 2.6 - .4 = 2.2 2.2 - .4 = 1.8 1.8 - .4 = 1.4 1.4 - .4 = 1.0 1.0 - .4 = 0.6 0.6 - .4 = 0.2 Now you must ...
*Friday, March 14, 2014 at 1:11pm*

**math**

(x-6)(x+3) = 0 for the product to be zero, one of the factors must be zero.
*Friday, March 14, 2014 at 1:05pm*

**Math**

slope is y-change/x-change so, as x changes by 2 each time, y changes by -3. So, the slope is ...
*Friday, March 14, 2014 at 12:54pm*

**Algebra **

1) If N is the set of natural numbers that are factors of 18, represent this set in roster form. 2) Suppose U={1,2,3,4,5,6,7,8,9,10} is the universal set and A={1,4,5,9,10} What is A? 3) The wrestling team is holding a car wash. The teams goal is to raise at lease 252 and each...
*Friday, March 14, 2014 at 12:34pm*

**Algebra **

1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 2) of the 125 students in an elementary school, 89 ...
*Friday, March 14, 2014 at 12:33pm*

**Math**

The data in the table are linear. Use the table to find the slope. x 2 4 6 8 y 1 -2 -5 -8 A. 3/2 B. -3/2 C. -2/3 D. 2/3
*Friday, March 14, 2014 at 12:17pm*

**math**

select the approximate values of x that are solutions to f(x)=0 where f(x)-5x^2+8+5
*Friday, March 14, 2014 at 11:46am*

**math**

select the approximate values of x that are solutions to f(x)=0, f(x)=-8x^2+2x+4
*Friday, March 14, 2014 at 11:44am*

**math**

slove for ^x in the equation X^2 -3x-18=0
*Friday, March 14, 2014 at 11:39am*

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