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March 30, 2015

March 30, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

2 4/15 minus 10/15 equals
*Saturday, February 7, 2015 at 5:16pm*

**math**

How many times as great as 15^9 is 15^10 ?
*Saturday, February 7, 2015 at 4:22pm*

**Math**

How would you solve this problem? cos x/1+sinx
*Saturday, February 7, 2015 at 3:23pm*

**math**

In a game, you draw a card with three consecutive numbers on it. You can choose one of the numbers and find the sum of its prime factors. Then you can move that many spaces on a game board. You draw a card with the numbers 25, 26, 27. Which number should you choose if you want...
*Saturday, February 7, 2015 at 3:11pm*

**Math**

The company needs at least $300,000 fire and theft insurance and at least $4,200,000 and liability for the from these plans. How many units should be purchased from H plan to minimize the cost of the premiums? What is the minimum premium?
*Saturday, February 7, 2015 at 2:57pm*

**Math Help**

Hi! I need help with this practice problem. My teacher gave us the answer, "2cot u" BUT she wants us to figure out why that's the correct answer. I'm having some trouble with this and could really use some help. Thank you! Problem: 1+ sec u/tan u - tan u/1+...
*Saturday, February 7, 2015 at 2:17pm*

**Math**

If sin x = -12/13 and tan x is positive, find the values of cos x and tan x.
*Saturday, February 7, 2015 at 1:50pm*

**Math**

Which of these are NOT a trigonometric identity? A.) 1-cos^2x=sin^2x B.) sin^2x+1=cos^2x C.) 1+cot^2x=csc^2x D.) sec^2x-1=tan^2x
*Saturday, February 7, 2015 at 1:39pm*

**^Math.^ Pls,I need help**

I was aked to prove that (a - b)^2 = (a + b)^2 - 4ab
*Saturday, February 7, 2015 at 1:32pm*

**Aztec high school**

Math/ terry has a board that is 4 yards long. How much needs to be saw off to make the board 2 feet 8 inchs long?
*Saturday, February 7, 2015 at 1:27pm*

**Vectors and Math**

The textbook answer is -80 Question: find (3a+4b)(2b+4a) if a= -i-3j+k and b=2i+4j-5k What I did: =6(a)(b) - 12|a|^2 + 2|b|^2 - 4(a)(b) =2(a)(b)-12|a|^2+2|b|^2 substitute a and b with given equations. Added like terms for each part.(too long to write out) and I got -20-6+38+4-...
*Saturday, February 7, 2015 at 1:16pm*

**math**

You need to give 6mg of a drug, The drug on hand has a concentration of 24mg per ounce. How many teaspoons will you give?
*Saturday, February 7, 2015 at 12:25pm*

**math**

A number from 49 to 58, inclusive, is drawn at random. P (an even number).
*Saturday, February 7, 2015 at 11:42am*

**math**

Alice wants to find all the price factors of the number you get when you multiply 17x11x13x7. She thinks she has to use a calculator to perform all the multiplications and then find the prime factorization of the resulting number. Do you agree? Why or why not? THX
*Saturday, February 7, 2015 at 9:32am*

**Consumer Math**

The Brush Company issued 4,000 shares of common stock worth $200,000.00 total. What is the par value of each share?
*Saturday, February 7, 2015 at 8:31am*

**math**

A coin is tossed 3 times. Find the probability that all the 3 are heads (A) if it is known that the first is heads (B) if it is known that the first 2 are heads (C) if it is known that the 2 of them are heads
*Saturday, February 7, 2015 at 6:13am*

**Math**

lim x→−12 sqrt(x^2 +25 −13)/x+12
*Saturday, February 7, 2015 at 1:40am*

**math**

A cylinder of radius 14 cm contains water. A metal solid cone of base radius 7 cm and height 18cm is submerged into the water. Find the change in height of the water level in the cylinder
*Saturday, February 7, 2015 at 1:18am*

**math**

There are two sign posts A and B on the edge of the road. A is 400 m to the west of b. A tree is on a bearing of 60 degree from A and a bearing of 330 degree from B Calculate the shortest distance of the tree from the edge of the road.
*Saturday, February 7, 2015 at 1:18am*

**math**

The a hollow cylinder. The internal and external radii are estimated to be 6 cm and 8 cm respectively, to the nearest whole number. The height of the cylinder is exactly 14 cm. (a) Determine the exactly values for internal and external radii which give maximum volume of the ...
*Saturday, February 7, 2015 at 1:04am*

**MATH**

If I put $300 in an account that earns 5.5%, how much will there be in the account at the end of 21 years?
*Saturday, February 7, 2015 at 12:58am*

**math**

how many times as great as 15^9 is 15^10?
*Saturday, February 7, 2015 at 12:46am*

**math**

Explain why it is possible to draw more than two different rectangles with an area of 36 square units, but it is not possible to draw more than two different rectangles with an area of 15 square units. The sides of the rectangles are whole numbers. EXPLAIN your answer. THX
*Saturday, February 7, 2015 at 12:29am*

**math**

An artist makes three types of ceramic statues (large, medium, and small) at a monthly cost of $820 for 180 statues. The manufacturing costs for the three types are $6, $5, and $4. If the statues sell for $22, $14, and $11, respectively, how many of each type should be made to...
*Saturday, February 7, 2015 at 12:27am*

**Math**

if z=3i and w=5i, then z<w. True or False?
*Friday, February 6, 2015 at 10:52pm*

**math**

x2 + x − 42
*Friday, February 6, 2015 at 9:36pm*

**Math**

A 15 m flagpole stands on level ground. from point P, due west of the flagpole the angle of elevation of the top of the pole is 38 degrees. From point Q, due north of the flagpole, the flagpole has an angle of elevation of 25 degrees. Find the distance of PQ, correct to one ...
*Friday, February 6, 2015 at 9:14pm*

**math**

A fruitier bought 144 pineapples at $10 for every six pineapples. Sh sold some of them at $12 for every three and the rest at $6 for every two. If she made a 65% profit, calculate the number of pineapples sold at $12 for every three
*Friday, February 6, 2015 at 8:34pm*

**math**

A and B are two matrices. If A= 1 2 4 3 Find B given that A^2 = A +B
*Friday, February 6, 2015 at 8:14pm*

**math**

f(x) = 0 if x<-3 f(x) = 4 if -3≤x<1 f(x) = -2 if 1≤x<5 f(x) = 0 if x≥5 g(x) = integral from -3 to x of f(t)dt g(-4) = 0 g(-2) = 4 g(2) = ? g(6) = ? The absolute maximum of g(x) when x = ? and is the value of ? It may be helpful to graph f(x). I didn...
*Friday, February 6, 2015 at 7:05pm*

**math**

If f(1) = 15 f' is continuous and integral from 1 to 6 of f'(t)dt = 29 what is f(6)? I took the antiderivative as F(6)-F(1) so it's 6x-1x and set it to 29... but that really does not do anything, especially if you plug in 1.
*Friday, February 6, 2015 at 6:56pm*

**math**

Let y = integrate from 1-9x to 1 of (u^3)/(1+u^2) What is y'? I flipped the integral so it's 1 to 1-9x and had the derivative of -9 via chain rule so -9 and just plugged in 1-9x to the (u^3)/(1+u^2) so it's -9*((1-9x)^3)/(1+(1-9x)^2). It tells me what's wrong; ...
*Friday, February 6, 2015 at 6:48pm*

**math**

how to rewrite the radical (index is 8)√5^2 as 5 to the power of a rational exponent ?
*Friday, February 6, 2015 at 6:27pm*

**Math**

1/5(2x-10) + 4x = -3(1/5x + 4. Solve for x. I need some really help! please and thank you. Ms.Sue?
*Friday, February 6, 2015 at 6:16pm*

**math**

Use the line graph to solve. What was the difference in water levels between Week 2 and Week 4? A. 10 m B. 1 m C. 0.10 m D. 0.01 m the water kecvers is 5.3 and 5.4
*Friday, February 6, 2015 at 5:52pm*

**Math**

1/5(2x-10) + 4x = -3(1/5x + 4. Solve for x. I need some really help! please and thank you
*Friday, February 6, 2015 at 5:36pm*

**help math**

3x+7= -11+2x my answer x=1
*Friday, February 6, 2015 at 5:34pm*

**math**

Emilio’s pay varies directly with the number of sales he makes. He made 22 sales and earned $154. How much will he earn for 35 sales? $
*Friday, February 6, 2015 at 5:05pm*

**math**

A student’s final grade in chemistry is determined by the following weights: Quizzes 5% Exam 1 20% Exam 2 20% Lab Reports 15% Research Paper 15% Final Exam 25% The student received the following grades: Lab reports: 75 80 70 75 85 69 90 75 Quizzes: 85 60 70 0 75 80 80 80 ...
*Friday, February 6, 2015 at 4:09pm*

**math**

Solve the equation sin 5/2¦È = -1/2 for 0¡ã ¡Ü 0 ¡Ü 180¡ã
*Friday, February 6, 2015 at 2:48pm*

**Math**

Find the distance between P1(3, –195°) and P2(–4, –94°) on the polar plane. Round your answer to the nearest thousandth. I got 5.75 as my answer. Is this correct?
*Friday, February 6, 2015 at 2:45pm*

**math**

Mary bought maize and beans from a wholesaler. She then mixed the maize and beans ratio 4:3, she bought the maize as $4 per kg and the beans $2 per kg. if she was to make a profit of 30 %. What should be the selling of price 1 kg of the mixture?
*Friday, February 6, 2015 at 1:47pm*

**math**

The cash price of a car is $25000. A customer paid deposits $ 3750. He repaid the amount owing in 24 equal monthly installments. If he was charged simple interest at the rate of 40% p.a, how much was each installment. 25000 – 3750 = 21250 21250 × 0.4 × 24/12 =...
*Friday, February 6, 2015 at 1:20pm*

**Math (Probability)**

It is known that steroids give users an advantage in athletic contests, but it is also known that steroid use is banned in athletics. As a result, a steroid testing program has been instituted and athletes are randomly tested. The test procedures are believed to be equally ...
*Friday, February 6, 2015 at 11:44am*

**Math**

Hi! So this question kind of has two parts to it. If someone could help me with this, that would be great! Thanks! :) Juan lives in a large city and commutes to work daily by subway or taxi. He takes the subway 80% of the time because it costs less and he takes a taxi 20% of ...
*Friday, February 6, 2015 at 11:43am*

**math**

what do they mean by find the sum of 28g +14g and how do I do it
*Friday, February 6, 2015 at 11:42am*

**math/algebra**

Determine three consecutive odd integers such that three times the middle integer is seven more than the sum of the first and third integers.
*Friday, February 6, 2015 at 11:24am*

**math**

The measures of two angles of a triangle are 36 and 71. Find the measure of the third angle, and classify he triangle according to its angles. Would you have to add 36 and 71 and then subtract the answer from 180. Which gives you an answer of 73 acute
*Friday, February 6, 2015 at 10:57am*

**math**

How long will it take to earn $252 in interest if $1200 is invested at a 7% annual interest rate?
*Friday, February 6, 2015 at 10:55am*

**math**

Write a quadratic function rule for the given table in problems 4 and 5. 4. X (0, 1, 2, 3) Y (-6, -5, -7, 3) a. y= x-6 b. y= x-4 c. y= x^2 - 3 d. y= x^2 - 6 5. X(-1, 0, 1, 7) Y(5,4,5,8) a.y=x+4 b.y=x^2+4 c.y= x^2+6 d.y=x+6
*Friday, February 6, 2015 at 8:37am*

**math**

A man sold 3/5 of the goods at 20% loss, at what profit% should he sell remaining goods to get 10% profit on the whole?
*Friday, February 6, 2015 at 6:13am*

**math**

) A water tank is emptying steadily by 2 liters of water per hour. There were 2 liters of water 6 hours after midnight. Let x represent the number of hours since midnight, and let y represent the number of liters of water in the tank. Find the equation showing the amount of ...
*Friday, February 6, 2015 at 3:16am*

**math**

) A water tank is emptying steadily by 2 liters of water per hour. There were 2 liters of water 6 hours after midnight. Let x represent the number of hours since midnight, and let y represent the number of liters of water in the tank. Find the equation showing the amount of ...
*Friday, February 6, 2015 at 1:50am*

**math**

An employee started on a salary of £ 6,000 per annum and received a constant increment. If he earned a total of £ 32,400 by the end of five years, calculate his annual increment
*Friday, February 6, 2015 at 1:46am*

**math**

Mary bought maize and beans from a wholesaler. She then mixed the maize and beans ratio 4:3, she bought the maize as $12 per kg and the beans $4 per kg. if she was to make a profit of 30 %. What should be the selling of price 1 kg of the mixture?
*Friday, February 6, 2015 at 1:43am*

**math **

At the beginning of every year, a man deposited $ 10,000 in a financial institution which paid compound interest at the rate of 20% p.a. He stopped further deposits after three years. The Money remained invested in the financial institution for a further eight years. (a) How ...
*Friday, February 6, 2015 at 1:41am*

**math**

The cash price of a car is $25000. A customer paid deposits $ 3750. He repaid the amount owing in 24 equal monthly installments. If he was charged simple interest at the rate of 40% p.a, how much was each installment. 25000 – 3750 = 21250 21250 × 0.4 × 24/12 =...
*Friday, February 6, 2015 at 1:37am*

**math**

The demand function for the Sicard wristwatch is given by the following function where d(x) (measured in units of a thousand) is the quantity demanded per week and x is the unit price in dollars. d(x) = 50 0.01x2 + 1 (0 ≤ x ≤ 20) (a) Find d'(x). d'(x) = (b...
*Friday, February 6, 2015 at 12:58am*

**math **

Place the numbers below on a number line: ∛7 , -3 , 0 , 105/59 , 7^1/3 , 7^2/3 I tries: ∛7 = 1.912 -3 0 105/59 = 1.779 7 1/3 = 7.33.. <-- right? 7 2/3 = 7.66.. <-- right? first of all ,does the answer i convert right?
*Friday, February 6, 2015 at 12:03am*

**math -hw help**

Determine whether the following regular tetrahedrons have an edge length that is a whole number, a rational number or irrational number. The surface are of a tetrahedron is given by the equation: SA = √ 3s^2 Surface are of regular tetrahedron A = 1.5 Surface are of ...
*Thursday, February 5, 2015 at 11:50pm*

**6TH GRADE MATH **

No more than 7 copies of a newspaper are left in the newspaper rack. Which inequality represents this situation? A. N<7 B. N>7 My answer is N<7. Do I have answer correct?
*Thursday, February 5, 2015 at 11:27pm*

**math**

Alyssa claims that dividing by 4/5 is the same thing as multipying by 5 then dividing by 4. Is she correct?explain why or why not
*Thursday, February 5, 2015 at 11:01pm*

**math**

Alyssa claims that dividing by 4/5 is the same thing as multipying by 5 then dividing by 4. Is she correct?explain why or why not
*Thursday, February 5, 2015 at 10:59pm*

**math NEED HELP**

2x+5 x+4 ------ - --------- x^2+3x+2 x^2+3x+2 i keep getting x+9 ------------ (x+1)(x+2)
*Thursday, February 5, 2015 at 10:45pm*

**math**

Francine can read 24 pages in 30 minutes.How can you mentally calculate the number of pages she can read in 45 minutes
*Thursday, February 5, 2015 at 10:17pm*

**math**

Alyssa claims that dividing by 4/5 is the same thing as multiplying by 5 then dividing by 4. Is she correct
*Thursday, February 5, 2015 at 10:09pm*

**Math**

A bag contains 33 balls: 10 blue, 11 red, and 12 green. If a person will select balls at random from the bag without replacement, what is the minimum number of balls that need to be selected in order to be sure that the balls selected include 3 balls of the same color?
*Thursday, February 5, 2015 at 9:59pm*

**math**

A ramp is what three dimensional shape?
*Thursday, February 5, 2015 at 9:34pm*

**Math**

How do I find the volume of a box? Length = 8 in Width= 1 3/4 in. Height= 12 1/8 in.
*Thursday, February 5, 2015 at 9:30pm*

**math **

i didi thi question but i keep getting a wrong answer ( x^2+5) - (x^2-2) -------- ------- (x^2-4) (4-x^2) THIS IS A RESTRICTIONS QUESTION PLEASE HELP
*Thursday, February 5, 2015 at 9:27pm*

**math**

a metal cutter was accurate to the nearest micron.about how many pieces of metal 0.8188 centimeters long could the metal cutter cut from a 32.253 length of metal?
*Thursday, February 5, 2015 at 9:26pm*

**math**

¾ of the seats in a concert hall were occupied. The ratio of adults to children was 7 : 3. If 90 more adults attended the concert, the number of adults would be 3 times the number of children. How many seats were in the concert hall?
*Thursday, February 5, 2015 at 9:19pm*

**math**

Madeline walked down her driveway and made a 90° turn to the left. What type of angle did Madeline make?
*Thursday, February 5, 2015 at 9:16pm*

**math **

At the beginning of every year, a man deposited $ 10,000 in a financial institution which paid compound interest at the rate of 20% p.a. He stopped further deposits after three years. The Money remained invested in the financial institution for a further eight years. (a) How ...
*Thursday, February 5, 2015 at 8:52pm*

**math**

Mary bought and beans from a wholesaler. She then mixed the maize and beans ratio 4:3, she bought the maize as $12 per kg and the beans $4 per kg. if she was to make a profit of 30 %. What should be the selling of price 1 kg of the mixture?
*Thursday, February 5, 2015 at 8:26pm*

**math**

The cash prize of a television is shillings 25000. A customer paid deposits Shillings 3750. She repaid the amount owing in 24 equal monthly installments. If she was charged simple interest at the rate of 40% p.a, how much was each installment
*Thursday, February 5, 2015 at 8:25pm*

**math **

which of the following shows the numbers in order from least to greatest a)2 /15,2 1/6,2 1/7 b)2 1/8,2 1/4, 2.4 c)2.4,2 1/5,2.6 d)2.2,2.5,2.25
*Thursday, February 5, 2015 at 8:13pm*

**math**

for what value of x (radicand) and n (index) can the expression "n root x " not be evaluated?
*Thursday, February 5, 2015 at 7:42pm*

**math**

Estimate 5/30 as a percentage.
*Thursday, February 5, 2015 at 7:40pm*

**math**

Estimate 5/30 as a percent.
*Thursday, February 5, 2015 at 7:32pm*

**Math**

There were 100 children at a carnival. 60 of them were boys. Express the number of girls as a fraction of the total number of children at the carnival
*Thursday, February 5, 2015 at 7:18pm*

**Math**

Find the length on each side of a rectangle Perimeter -24m side 1 - 2x-3 side 2 - x
*Thursday, February 5, 2015 at 7:08pm*

**math estimating products**

Show three ways to estimate 3 / 5 ×9 1/2. Identify each method you use.
*Thursday, February 5, 2015 at 7:00pm*

**Math**

Three eights of the cast in a musical have to sing. What fraction of the cost does not have to sing?
*Thursday, February 5, 2015 at 6:55pm*

**math**

Mary bought and beans from a wholesaler. She then mixed the maize and beans ratio 4:3 she bought the maize as $12 per kg and the beans $4 per kg. if she was to make a profit of 30 %. What should be the selling of price 1 kg of the mixture?
*Thursday, February 5, 2015 at 6:51pm*

**Math**

Find the length on each side of a triangle. Perimeter - 35m side 1 - x side 2 - x+2 side 3 - x+3
*Thursday, February 5, 2015 at 6:43pm*

**Math**

mars orbits the sun at a rate of 15 miles per seconds. how far does mars travel in one day? is the answer 360 miles in a day?
*Thursday, February 5, 2015 at 6:14pm*

**Math**

I am a 3digit number divisible by 3. my tens digit is three times as great as my hundreds digit and the sum of my digits is 15. if you were reverse my digits I am divisible by six, as well as by 3. what number am I?
*Thursday, February 5, 2015 at 6:12pm*

**math**

The ratio of one side of a polygon to the corresponding side of a similar polygon is 5:8 The perimeter of the second polygon is 96. What is the perimeter of the first polygon.
*Thursday, February 5, 2015 at 6:11pm*

**Math**

I am a three digit number less than 300. I am divisible by two and five but not 3. What number am I?
*Thursday, February 5, 2015 at 6:03pm*

**math**

kathyrn is thinking of four numbers from 1 through 9 with a sum of 18 find the numbers. this is the questions to the answer above.
*Thursday, February 5, 2015 at 5:55pm*

**math**

one company makes 50 t-shirts for $295 and another offers 40 t-shirts for $250. which company is the better deal? answer please
*Thursday, February 5, 2015 at 5:51pm*

**math**

On Rhonda's family farm, the workers picked 5/12 of the strawberries in the first week. These strawberries were put in 10 crates, and 20kg were left over. The crates were sent off to the supermarket and the other 20kg were sold at the family fruit stand. During the second ...
*Thursday, February 5, 2015 at 5:41pm*

**Math**

a comic book store sells used comic books in a package of 5 and new comic books in a package of 3. if Amy buys a total of 16 comic books, how many packages of new and used comic books dis she buy. i think it is 2 packages of used comic books and 2 new comic books. am i correct?
*Thursday, February 5, 2015 at 5:26pm*

**MATH**

Anna bought seven half gallons of apple juice and 18 quarts of orange juice. How many gallons of juice did she buy
*Thursday, February 5, 2015 at 5:08pm*

**Math Ms Sue please help me **

In the diagram, lines m and n are parallel. If m∠2 = 150°, find the measure of the following angles. lines m and n are parallel. If m∠2 = 150°, find the measure of the following angles 1. ∠4 = ? (1 point) 120º 50º 30º 150º 2. &#...
*Thursday, February 5, 2015 at 5:02pm*

**Math**

If you eat 1/6 of one pizza 1/4 of another pizza 5/12 of another pizza and 1/3 of another pizza have you eaten the equivalent of a whole pizza
*Thursday, February 5, 2015 at 4:39pm*

**Math**

1. Does the table represent an exponential function? X: 1, 2, 3, 4 Y:-1,-8,-27,-64 Yes or No? I am confused on this, so help would be nice. Thank you.
*Thursday, February 5, 2015 at 4:25pm*

**math**

what is the mystery number?greater than 1oo -odd more than 3 tens less than 150 the sum of the digits is 12?? please help
*Thursday, February 5, 2015 at 4:06pm*

**Math**

would 1,661.06 turn into 1,661 if I rounded it to the nearest tenth ?
*Thursday, February 5, 2015 at 3:40pm*

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