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March 30, 2015

Homework Help: Math

Branches of Math

Recent Math Questions

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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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