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August 1, 2014

Homework Help: Math

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Recent Math Questions

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math
If the point (a,3) lies on the graph of the equation 5x + y = 8, then a=
Thursday, July 10, 2014 at 2:26am

math
If the equation of a circle is (x + 5)2 + (y - 7)2 = 36, its radius is
Thursday, July 10, 2014 at 2:26am

math
The product of two numbers is 35. one of the numbers is n, what expression represents the other number?
Wednesday, July 9, 2014 at 11:37pm

math
a drug is supplied as a 20 mg/ml solution in a 50 ml vial. you need to make 15 ml of a 10 mg/ml solution. how much concentrate and how much diluent are needed to obtain the desired final volume?
Wednesday, July 9, 2014 at 11:29pm

math
Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. After hours of burning, a candle has a height of centimeters. After hours of burning, its height is centimeters. What is the height of the candle ...
Wednesday, July 9, 2014 at 10:50pm

Math
How do I work this problem? A license plate is to consist of 2 letters followed by 5 digits. Determine the number of different license plates possible if repetition of letters and numbers is not permitted. is this correct 26*26*10*10*10*10*10= 67,600,000
Wednesday, July 9, 2014 at 10:39pm

math
The radius of one sphere is twice as great as the radius of a second sphere. Find the ratio of their surface areas.
Wednesday, July 9, 2014 at 10:33pm

Math
Shantle and Kwamie are planning to buy their first home. Although they are excited about the prospect of being homeowners, they are also a little frightened. A mortgage payment for the next 30 years sounds like a huge commitment. They visited a few developments and scanned the...
Wednesday, July 9, 2014 at 10:31pm

math
what is procentage strength of a mixture made from 250 ml of witch hazel containing 16% alcohol, 150 ml of 90% alcohol and 450 ml of distilled water?
Wednesday, July 9, 2014 at 10:28pm

math
Find the slant height for a right circular cone with a radius of 3 and a height of 5.
Wednesday, July 9, 2014 at 9:22pm

Math
I am a number between 20 and 30. When you divide me into 6 equal groups,there is an even number in each group and 2 are left over.what number am I?
Wednesday, July 9, 2014 at 7:24pm

math
A random sample was taken from the normal IQ population, which has μ = 100 and σ = 15. ALL INFORMATION IS GIVEN: We gave a random sample of 25 undergrad students (n = 25) a new study pattern to see if it increases their IQ score. The samples mean IQ score is 112. The...
Wednesday, July 9, 2014 at 9:19am

Math
Parametrically represent a Mobius strip. Since I am very unfamiliar with this topic, Math jargon should appear as little as possible and please provide step by step working.
Wednesday, July 9, 2014 at 9:17am

math
student is taking up midterm exam for 3 minutes left to answer 10 remaining question of which there are 4 choices of answers for each question with only one choice correct. what is the probability of getting more than 5 of his answer is correct
Wednesday, July 9, 2014 at 8:47am

math
It has been found out that the probability that a child is a male in family is 0.4. In a family of 6 children, what is the probability that; i. exactly 5 are boys ? ii. at least 4 are boys ? iii. all boys
Wednesday, July 9, 2014 at 6:07am

Math pre-calculus
Write an expression for all of the vertical asymptotes of y=-3 csc(pi/4 *x) Can you list step by step to show how to do it , I don't understand this problem !!! Thanks
Wednesday, July 9, 2014 at 1:27am

Math
I have 3 questions: 1) If ABC and DEF are three- digit numbers, which of the following could be the number of digits in the product of ABC and DEF? i. 4 ii. 5 iii. 6 I don't have the vaguest idea on how to do this and what type of math it is part of... My answer is 6 only ...
Tuesday, July 8, 2014 at 11:20pm

Math 221
What is 5(8+v)= Please break it down for me to get a better understanding?
Tuesday, July 8, 2014 at 10:35pm

Math
the time required for one complete oscillation of a pendulum is called its period. if the length L of the pendulum is measured in feet and the period P n seconds, then the period is given by P=2¶(L/g)^1/2, where g is constant. use differentials to show the percentage ...
Tuesday, July 8, 2014 at 10:00pm

English
1. He has studied math for three hours. 2. He has been studying for three hours. ---------------- Are both grammatical? Which one is commonly used?
Tuesday, July 8, 2014 at 9:16pm

math
The given curve is rotated about the y-axis. Find the area of the resulting surface. y = 3 − x2, 0 ¡Ü x ¡Ü 4
Tuesday, July 8, 2014 at 5:44pm

math
5.Escape velocity is the speed necessary to escape the gravitational pull of a plant. The escape velocity of Earth is 11.3 kilometers per second, while the escape velocity of Saturn is 310% of that. What is the escape velocity of Saturn?
Tuesday, July 8, 2014 at 5:39pm

math
3.Students at one school sell magazine subscriptions to raise money for athletic equipment. The school keeps 20% of sales. How many dollars worth of subscriptions must be sold to make $1500?
Tuesday, July 8, 2014 at 5:31pm

Math
Write a formula expressing the information: i)Rose paid twice as much as Mike I used R for Rose and M for Mike The formula I cam up with is R=2M ii)Taxes are 6 percent of income [Use T and x] So I wrote it like this T(0.06)/X iii)There are twenty times as many students as ...
Tuesday, July 8, 2014 at 5:25pm

math
A ship model is 0.5% actual size. If the model is 1 meter long, what is the actual length of the ship?
Tuesday, July 8, 2014 at 4:59pm

Math
Ship A heads north at a speed of 22.2 km/h while ship B heads east Twenty two hours later they are 863 km apart
Tuesday, July 8, 2014 at 1:27pm

math
The fourth and ninth term of an a.p are -3 and 12 repectively find:the common different and the sum of the first seven term.
Tuesday, July 8, 2014 at 1:12pm

math
What number sets does square root 3 belong to?
Tuesday, July 8, 2014 at 12:25pm

math
It is important for Bob to have a gross salary in his fifth year of at least $100,000. He is promised salary increases of 3 percent per year in the second and third years and 5 percent thereafter. What must be his starting salary be to achieve his goal? My original answer was...
Tuesday, July 8, 2014 at 11:56am

Math
what is the maximal number of consecutive 3-digit numbers that have at least one odd digit?
Tuesday, July 8, 2014 at 11:38am

Math (statistics)
In an examination a candidate is given the four answers to four questions but is not told which answer applies to which question. He is asked to write down each of the four answers next to its appropriate question. b). show that there are 6 ways of getting just two answers in ...
Tuesday, July 8, 2014 at 11:21am

math
In order for a spacecraft to reach Earth's orbital velocity, it must achieve a speed of 17,500 mph in 610 seconds after its first stage burnout where it should have achieved a speed of 1530 mph. What percent increase in speed per second is necessary after first stage in ...
Tuesday, July 8, 2014 at 11:20am

chem/math
I need help solving for x here (I dont get the right answer, which is supposed to be x=0.137) 3.88 = 3.74 + log (x/0.1) Please explain how you would get that answer Thank you
Tuesday, July 8, 2014 at 6:30am

MATH
need word problem help. One half of the total budget of $5,000 was for salaries. Three fifths of that amount was paid to 4 employees. How much of the budget was spent on employees? 1/2 of 5,000 = 2,500 2500 divided by 3/5 = 4166 2/3 Am I on the right track?
Tuesday, July 8, 2014 at 2:00am

business math
Assume 450,000 people line up on the streets to see the Macy's Thanksgiving Parade in 2010. If attendance is expected to increase 30%, what will be the number of people lined up on the street to see the 2011 parade?
Tuesday, July 8, 2014 at 1:15am

Math
Encircle the error in the following "proof" that the two arbitrary numbers are equal to each other. Let a and b the arbitrary numbers such that a is not equal to b. Then, (a - b)^2 = a^2 - 2ab + b^2 = b^2 - 2ab + a^2 (a - b)^2 = (b - a)^2 a - b = b - a 2a = 2b a = b
Monday, July 7, 2014 at 11:41pm

Math
Consider the general quadratic equation ax^2 + bx + c = 0, where a is not equal to 0. Solve for x by completing the square.
Monday, July 7, 2014 at 11:23pm

Math
Find the monthly payment. Mortgage amount Annual percentage rate 2. $146,800 5.25% 30 years 4. $113,400 5% 15 years 6. Find the interest paid the mortgage in exercise 2. 8. Find the total interest paid for the mortgage in exercise 4.
Monday, July 7, 2014 at 10:46pm

Math
In interviewing November's statement she notices that her beginning balance was $600 and that she made a $200 payment on November 10. She also charged purchases of $80 on November, 5, $100 on November 15, and $50 on November 30. She paid $5.27 in interest the month before...
Monday, July 7, 2014 at 10:37pm

math
. Four tablespoons of extract are mixed with 240 ml of oral suspension base. What is the final concentration of the suspension?
Monday, July 7, 2014 at 9:43pm

Math/Statistics
A group of 10 students have average of GPA of 2.8 with SD of 0.3. Does this group present enough evidence to indicate that the average GPA is less than 3.0? Make your decision at a 5% level of significance.
Monday, July 7, 2014 at 6:29pm

math
There are 60 coins in a box containing only nickels, dimes, and quarters. If there is one more than twice as many dimes as quarters, and the total value of all dimes is five cents less than the total value of all nickels, how many of each denomination are in the box?
Monday, July 7, 2014 at 5:43pm

math
Sue is two years older than Chris. Jim is 4 years older than Sue. Their ages total 68. How old is Sue?
Monday, July 7, 2014 at 5:40pm

math
17. Jenny, Greg, & Hank gather their marbles and have 20 in total. If Jenny has 3 less than twice the number Greg has, and Hank has 1 less than Greg has, how many marbles do each of them have?
Monday, July 7, 2014 at 4:31pm

business math
If refinishing your basement at a cost of $44,568 would add $18,520 to the resale value of your home, what percent of your cost is recouped? (Round to the nearest percent.)
Monday, July 7, 2014 at 3:10pm

Math
what is the future value of 500 deposits at the end of each year for eight years 8% compounded annually what is the annuity at the end of eight years
Monday, July 7, 2014 at 2:13pm

math
you have mixed equal parts of a 10 % and a 2,5 % benzocaine ointment what is the resulting concentration?
Monday, July 7, 2014 at 1:18pm

math
you have mixed 25g of 2%crem into 35g of 6% cream. What is the resulting concentration?
Monday, July 7, 2014 at 1:17pm

math
the population of Erik's school increased by 5% from last year to this year. This year, there were 15 more students in his school than last year. How many students were in Erik's school last year?
Monday, July 7, 2014 at 12:24pm

math
A patient needs 45% dextrose 100ml The pharmacy has only 70% dextrose 500ml. a) how much concentrate will you need b) how much diluent
Monday, July 7, 2014 at 11:59am

math
If a b c are non zero,unequal rational numbers then prove that the roots of the eqn (abc²) x²+ 3a²cx+b²cx-6a²-ab+2b²​;=0 are rational.
Monday, July 7, 2014 at 11:47am

math
If p,q,r,s belongs to R and pr=2(q+s) then show that atleast one of the eqn x²+px+q=0,x²+rx+s=0 has real roots.
Monday, July 7, 2014 at 11:45am

math
There are 25 red beads,x blue beads and y green beads in a box.When a bead is picked at random,the probability that it is blue is 1 over 4 and the probability that it is green is 1 over 3. (a)Find the value of x and y. (b)How many blue beads must be added so that the ...
Monday, July 7, 2014 at 11:37am

math
Find the value of 'a' so that x²-11x+a=0 and x²-14x+2a=0 have a common root.
Monday, July 7, 2014 at 11:33am

math
In a bag,there are 18 cards of which x cards are coloured and the rest are white.When another 6 white cards are added into the bag,the probability of a white card being picked is x over 8.Find the value of x. Answer:6 How?
Monday, July 7, 2014 at 10:23am

Math
Add a term to b^2 - 4/5b to make the expression a perfect square. Write the results as the square of a bracketed expression.
Monday, July 7, 2014 at 9:37am

Math
If the largest two-digit number is added to 200, what is the sum?
Monday, July 7, 2014 at 9:26am

Math
a party of people go for an excursion in x cars, of which y cars each hold 4 people and the remainder 5. How many people were their in the party
Monday, July 7, 2014 at 3:00am

math
use a ruler and a pair of compass construct a triangle 6cm 5cm 7cm and the degree 45
Monday, July 7, 2014 at 1:26am

Math
If you purchase a fishing boat for 18 monthly payments of $106 and an interest charge of $238, how much is the refund after 10 payments
Monday, July 7, 2014 at 12:32am

math
A bathroom measures 250cm by 175cm.Calculate the side of the largest square tile that can be used to tile the floor without cutting.
Sunday, July 6, 2014 at 11:28pm

Math
A living room measures 450cm by 330cm.Find the dimension of the largest tile that can be used to tile the floor without cutting.
Sunday, July 6, 2014 at 11:24pm

Math
Find the discount (ordinary interest) and proceeds on a promissory note for $2,000 made by Barbara Jones on February 10, 2007, and payable to First State Bank on August 10, 2007, with a discount rate of 9%.
Sunday, July 6, 2014 at 10:40pm

Math 221
2 5 - / - 9 12 /-means divided by What is the simplest form?
Sunday, July 6, 2014 at 9:41pm

Math 221
2 5 - / - 9 12 / is divided by
Sunday, July 6, 2014 at 9:30pm

Math 221
A chess club with 55 members is electing a new president. Ali received 33 votes. What percentage of the club members voted for Ali?
Sunday, July 6, 2014 at 8:43pm

Math
When x is increased by 5, the result is 60% of increasing x by 15. What is the value of x? I got this far: x+5 = 0.60(x+15) x+5 = 0.60x + 9 x = 0.60x + 4 What is the next step?
Sunday, July 6, 2014 at 7:33pm

Math
Find the annual percentage rate on a loan of $1,500 for 18 months if the loan requires $190 interest and is repaid monthly.
Sunday, July 6, 2014 at 6:40pm

Math
Malinda Levi borrows $12,000 on a 9.5% , 90 day note. On the 30th day, Malinda pays $4,000 on the note. If ordinary interest is applied, what is Malinda’s adjusted principal after the partial payment? What is the adjusted balance due at maturity?
Sunday, July 6, 2014 at 6:30pm

Math
The finance charge on a copier was $1,778. The loan for copier was to be paid in 18 monthly payments. Find the finance charge refund if it is paid off in eight months.
Sunday, July 6, 2014 at 6:28pm

Math
Alice Dubois was charged $455 in finance charges on a loan for 15 months. Find the finance charge refund if she pays off the loan in full after 10 payments.
Sunday, July 6, 2014 at 5:24pm

Math
vacuum cleaner was purchase on the installment plan with 12 monthly payments $36.98 each. If the cash price was $415 and there was no down payment , find the annual percentage rate.
Sunday, July 6, 2014 at 5:23pm

statistics
Describe one of the following experiments, which study human subjects, in 450 to 750 words: A pharmaceutical company wants to test a new sleep aid. An educational company is interested in determining whether their new math curriculum will raise standardized test scores. ...
Sunday, July 6, 2014 at 4:50pm

math
if you have 600 cards and gave away 280 of them. to the nearest hundredth what percant of the cards is left
Sunday, July 6, 2014 at 4:09pm

Math 221
How do simplify 0.05(0.3m + 35n) – 0.8(-0.09n – 22m)
Sunday, July 6, 2014 at 3:53pm

Math 221
How do I simplify 2w – 3 + 3(w – 4) – 5(w – 6)
Sunday, July 6, 2014 at 3:53pm

Math 221
How do I simplify 2a(a-5)+4(a-5)
Sunday, July 6, 2014 at 3:52pm

Math
Using the maximum ratios for a conventional mortgage, how big a monthly payment could the Taylor family afford if their gross ( before- tax) monthly income amounted to $ 3,500? Would it make any difference if they were already making monthly installment loan pay-ments totaling...
Sunday, July 6, 2014 at 3:48pm

math
Anny invests $3,000, at 6% interest, compounded monthly for 1 year. Use Table 11-1 to calculate the compound amount for her investment.
Sunday, July 6, 2014 at 1:47pm

math/117
An object 5.7 feet tall casts a shadow that is 17.1 feet long. How long in feet would the shadow be for an object which is 19.5 feet tall?
Sunday, July 6, 2014 at 1:21pm

math
find the zeroes of : p(x)= X^2 + 2 root2x + 6
Sunday, July 6, 2014 at 12:42pm

Math
The 8th term of a g.p is -7/32 fine it's common ration if its first term is 28
Sunday, July 6, 2014 at 9:18am

math
Mang jose wants to make a table which has an area of 6m, the length of the table has to be 1m longer than the width. If the width of the table is p meters, what will be the length. Form a quadratic equation that represent the equation.
Sunday, July 6, 2014 at 8:21am

math
there are seven consecutive even numbers .if the largest no is x write an algebraic expression for the middle no . if the middle no is 48 find the value of smallest no
Sunday, July 6, 2014 at 7:54am

math
a vendor loses the selling price of 4 oranges on selling 36 oranges . what is his loss percent
Sunday, July 6, 2014 at 5:15am

Math
The probability that Roberto wins is 1/3 the probability that Roberto loses. What is the probability that Roberto loses?
Saturday, July 5, 2014 at 11:35pm

Math
X and y are positive integers and x+y=11. What is the largest possible value of 1/x -1/y?
Saturday, July 5, 2014 at 11:33pm

math
If a,b,c are integers and b²=4(ac+5d²), d €N then roots of the eqn ax²+bx+c=0 are
Saturday, July 5, 2014 at 12:12pm

math
Let a,b and c be real numbers such that 4a+2b+c =0 and ab>0. Then the eqn ax²+bx²+cx²=0 has-
Saturday, July 5, 2014 at 12:10pm

math
Consider the eqn x²+2x-n =0 where n€N and n€[5,100]. Total no. Of different values of 'n' so that the given eqn has integral roots is-
Saturday, July 5, 2014 at 12:08pm

math
If the roots of the eqn x²-2cx+ab=0 are real and unequal, then prove that the roots of x²-2(a+b)x+a²+b²+2c²​=0 will be imaginary.
Saturday, July 5, 2014 at 12:03pm

math
Show that if roots of eqn (a²-bc) x²+2(b²-ac)x +c²-ab=0 are equal then either b=0 or a³+b³+c³=3abc.
Saturday, July 5, 2014 at 11:58am

math
find the straight line that passes through point (2,4) and is perpendicular to line 2x + 12y - 6 = 0
Saturday, July 5, 2014 at 10:50am

math
X+3y+9=0 and x+3y-7=0 are parallel or not ,how to work out,can anyone show me please
Saturday, July 5, 2014 at 9:40am

math
this code has five digit 1,2,3,4,5. the first digit plus the second digit is equal to the third digit the second digit twice times the first digit the second digit is half the fourth digit and the fifth digit is the sum of the first and fourth digits. what is the answer?
Saturday, July 5, 2014 at 4:49am

Math
Find (a) the exact interest and (b) the ordinary interest. Round answers to the nearest cent Malinda Levi borrows $12,000 on a 9.5% , 90 day note. On the 30th day, Malinda pays $4,000 on the note. If ordinary interest is applied, what is Malinda’s adjusted principal after...
Saturday, July 5, 2014 at 12:07am

Math
Find (a) the exact interest and (b) the ordinary interest. Round answers to the nearest cent Find the discount (ordinary interest) and proceeds on a promissory note for $2,000 made by Barbara Jones on February 10, 2007, and payable to First State Bank on August 10, 2007, with ...
Saturday, July 5, 2014 at 12:06am

Math
Myrna Lewis wishes to have $4,000 in four years to tour Europe. How much must she invest today at 8% interest compounded quarterly to have $4,000 in four years? $4000 = x(1+ 0.02)^16 =$2,913.78
Friday, July 4, 2014 at 11:53pm

Math
$500 in 15 years at 8% annual interest compounded semiannually. P = $500 Time = 30 years Rate = 4% $500(1+.08/2)^(2*15) = $1621.70
Friday, July 4, 2014 at 11:53pm

Math
$1,000 in seven years at 8% compounded quarterly.
Friday, July 4, 2014 at 11:50pm

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