Friday

September 19, 2014

September 19, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

the sum of the digits in a three-digit number is 16.the ones digit is three times the hundreds digit.if the digits of the number are reversed ,the new number is 594 more than the original .what is the original number?
*Friday, September 19, 2014 at 5:52pm*

**Math**

This is really confusing to me. I'm not sure on how to do this or even how to get an answer? Can someone perhaps help me? Thanks! :) f(x)=x^2-25/x-5 if x is less than or equal to -1; 2x-3 if x>-1. f(4)= f(-1)=
*Friday, September 19, 2014 at 5:25pm*

**math skill sheet 777**

i have equal numbers of pennies, nickels ,dimes, and quarters. The total value of my coins is $2.05. Altogether i have ? coins. Please tell me how you did it and show your work please so i understand.
*Friday, September 19, 2014 at 5:09pm*

**Math**

Which of the following equations has an infinite number of solutions? A. 3x-3=-4x B. 2y+4-y=16 C. 7x+5=4x+5+3x D. 6y-2=2(y-1)*** Is the answer D?
*Friday, September 19, 2014 at 4:01pm*

**Math help**

Find all whole numbers which: A: 20-x=x B: 20-x-6=0 C: x+4=3+x+1
*Friday, September 19, 2014 at 4:01pm*

**Math Help**

Evaluate the piecewise function: f(x)= {x^2-25/x-5, if x < -1 --- and 2x-3, if x>-1 We are looking or f(4)= and f(-1)= with that whole equation
*Friday, September 19, 2014 at 3:46pm*

**Math **

Evaluate the function and simplify: f(x)=4x^2+3x-3; f(x-1)
*Friday, September 19, 2014 at 3:42pm*

**Math**

Determine whether the graph of x=y^2-1 is symmetric with respect to the x-axis, the y-axis, the origin, or has no symmetry.
*Friday, September 19, 2014 at 3:41pm*

**Math help**

There is a center circle with eight circles connected to it. A. Place numbers 24 through 32 so the sums are all the same. B. How many numbers can be placed in the middle to obtain a solution?
*Friday, September 19, 2014 at 3:38pm*

**Math **

Graph the inequality:x</=-2 A. <-6,-4,-2,0,2,4,6> The dot is on the -2 going to 6 and it's a filled dot. B. <-6,-4,-2,0,2,4,6> The dot is on the -2 going to -6 and its a filled dot. C. <-6,-4,-2,0,2,4,6> The dot is on the -2 going to -6 it's a ...
*Friday, September 19, 2014 at 3:26pm*

**Math**

The width of a rectangle is 6 in. less than its length. The perimeter is 68 in. What is the width of the rectangle? (not multiple choice) my answer is 14 5(a-4) - 8a = 55 (not multiple choice) my answer -25 2n-7/3 = 15 (not multiple choice) my answer is 6
*Friday, September 19, 2014 at 3:25pm*

**Math**

Which of the following equations has an infinite number of solutions? A. 3x-3=-4x B. 2y+4-y=16 C. 7x+5=4x+5+3x D. 6y-2=2(y-1)*** Is the answer D?
*Friday, September 19, 2014 at 3:20pm*

**Math**

Write the inequality and solve for the following question: the result of 6 subtracted from a number n is at least 2, A. n-2>6;n>8 B. n-6>2;n>8 these arrows have a line under them.*** C. n+6>2;n<4 these arrows have a line under them. D. n+6>2;n>4 these ...
*Friday, September 19, 2014 at 3:10pm*

**Math**

g/-5<-18 Solve the inequality A. g<-23 B. g>-90 C. g>90 D. g<90 Is the answer C?
*Friday, September 19, 2014 at 2:59pm*

**Math**

What's the probability of picking out 5 white and 3 red balls from a bag containing 12 white and 3 red balls? That is all the red balls and 5 white from the bag leaving 7 white balls.
*Friday, September 19, 2014 at 2:41pm*

**Math**

The first prize in a lottery is $250 000. Each winner chosen after the first is paid 20% as much as the winner before them. Determine a formula for the sum of n terms of the geometric sequence.
*Friday, September 19, 2014 at 1:15pm*

**Math**

For each arithmetic sequence, determine a) the value of t1 and d (2 marks) b) an explicit formula for the general term (2 marks) c) t20 (2 marks) 3a, 3a – 2b, 3a – 4b, 3a – 6b, …
*Friday, September 19, 2014 at 12:57pm*

**Math **

The width of a rectangle is 6 in. less than its length. The perimeter is 68 in. What is the width of the rectangle? (not multiple choice) my answer is 14 5(a-4) - 8a = 55 (not multiple choice) my answer -25 2n-7/3 = 15 (not multiple choice) my answer is 6
*Friday, September 19, 2014 at 12:53pm*

**Math**

Find the value of term 1 given S8 is equal to -3280 and the common ratio is equal to -3?
*Friday, September 19, 2014 at 12:40pm*

**Math**

A cone is 8cm high and its vertical angle is 62 degrees,find the diameter of its base
*Friday, September 19, 2014 at 12:34pm*

**math**

calculate the interest on a five-year loan of $13,950 at a 5.8% rate of interest.
*Friday, September 19, 2014 at 12:23pm*

**math**

Why do you think the scale in graphs is 0 to 28 by fours instead of 0 to 28 by one? What other scale could you use
*Friday, September 19, 2014 at 11:35am*

**math**

What does each space between the numbers represent?
*Friday, September 19, 2014 at 11:32am*

**math**

Explain how to use multiplication to check the answer to a division problem
*Friday, September 19, 2014 at 11:29am*

**math**

Explain how estimating the quotient helps you place the first digit in the quotient of division problem
*Friday, September 19, 2014 at 11:28am*

**Math**

You complete 3centimeters of a necklace in an hour. Each hour after the first, you triple the length of the necklace. Write an expression using exponents for the length of the necklace after three hours. Then find the length.
*Friday, September 19, 2014 at 10:55am*

**math**

how many ways can you choose two colors from green, orange, yellow, purple, blue, and silver?
*Friday, September 19, 2014 at 10:54am*

**Math**

square root -1 divided by square root -81 square root -36
*Friday, September 19, 2014 at 9:07am*

**Math**

Find the solutions of the equation. (Enter your answers as a comma-separated list.) x^4 = 625
*Friday, September 19, 2014 at 9:06am*

**math**

GCF of each pair of polynomials 27 y3z and 45 x2y
*Friday, September 19, 2014 at 6:51am*

**Math**

What is the largest possible value of the sum of 1000
*Friday, September 19, 2014 at 5:08am*

**math**

Estimate 540943 + 382093= 923036
*Friday, September 19, 2014 at 1:12am*

**math algebra word problems**

Two crews working toward each other are 9.45 miles apart. one crew paves 1.5 miles per day, and the other paves 1.2 mi per day. How long will it take them to meet?
*Friday, September 19, 2014 at 12:39am*

**Math**

Interpret th enumerical expression. (15 + 9 ) x 3
*Thursday, September 18, 2014 at 11:27pm*

**Math Precal/Trig**

Solve for n. 7((1-(-3)^n)/(1-(-3))=3829 I was confused on distributing the number 7, because we've always had problems with the number 1 on the outside.
*Thursday, September 18, 2014 at 11:07pm*

**Math (Exponents)**

A. Complete expanded form of 4.728 in exponential notation?
*Thursday, September 18, 2014 at 10:51pm*

**math**

I am thinking of a number. 55 but no more than 45 it is an odd number. The sum of the digits is 12. What is the number?
*Thursday, September 18, 2014 at 10:37pm*

**Math Problem (please help)**

Find the zeros of the function algebraically. f(x) = 36x^4 − 25x^2 x = (smallest value) x = x = (largest value)
*Thursday, September 18, 2014 at 10:36pm*

**Math-The chain rule HELP**

Use the chain rule and simplify your answer: y= 1/u prime u= 3x^2 + 5
*Thursday, September 18, 2014 at 10:28pm*

**math**

If P0 > c (which implies that −1 < a < 0), then the logistics function P(t) = c 1 + ae−bt decreases as t increases. Biologists often use this type of logistic function to model populations that decrease over time. See the following figure. Apply this ...
*Thursday, September 18, 2014 at 9:50pm*

**math**

Linda did 24 problems out of 25 correctly.In the next test she did twice as many examples correctly but received a mark only half as good.How many problems were there in the second test?
*Thursday, September 18, 2014 at 9:29pm*

**Math**

Which number is larger .545 or .54 repeating?
*Thursday, September 18, 2014 at 9:29pm*

**math**

Distribution of Employees in National Insurance Company by age groups:(for questions 76-78) Age Group Per cent 46 and over 25 40-45 34.5 35-39 25.62 30-34 12.9 Under 30 1.9 76. Thirty thousand employees of this company are 46 years or over.How many thousand(to the nearest 0.1 ...
*Thursday, September 18, 2014 at 8:59pm*

**Math**

what does that mean?? write the place and value of each number. 1)5,272,468,693 what is the selected digit in? ^ its eight
*Thursday, September 18, 2014 at 8:54pm*

**Math (Pre-Calculus)**

Can someone help me with this? Thanks! Find the zeros of the function algebraically. f(x)=x^2-8x+15 ---------------- 10x
*Thursday, September 18, 2014 at 8:50pm*

**math**

what is a multiple?
*Thursday, September 18, 2014 at 8:43pm*

**math**

one edition of the book has 352 pages, how many were used in its page numbers
*Thursday, September 18, 2014 at 8:24pm*

**math**

need help with this problem of reasoning quantitively. simplify (-2)to the 3rd power -2 to the 5th power
*Thursday, September 18, 2014 at 8:05pm*

**Math Gr 12**

We are learning to solve Factorable Polynomial Inequalities Algebraically. Question: Solve using intervals. (4x +1)(2-x) is greater than or equal to 0.
*Thursday, September 18, 2014 at 8:02pm*

**math**

Compute the rate for the following loan. Round answers to the nearest tenth of a percent; use ordinary interest when time is stated in days. Do not enter the percent symbol in your answer. Principal Rate (%) Time Interest $5,000 % 3 years $1,200
*Thursday, September 18, 2014 at 8:00pm*

**math**

There were 665 hot air balloon pilots at a hot air race . There were 1,550 more ground crew members than there were pilots. How many ground crew members than there were pilots. How many ground crew members were there?
*Thursday, September 18, 2014 at 7:51pm*

**math**

The manager turns the restaurants two neon signs on at the same time both signs blink as theyaare turned on. One sign blinks every 9 seconds and one sign blinks every firfteen seconds. How many seconds will they both blink together again?
*Thursday, September 18, 2014 at 7:31pm*

**math**

I am a whole number. when you add 3 to me you get a 2-digit number. The 2-digit number is the same as 3 four times. What number am I?
*Thursday, September 18, 2014 at 6:33pm*

**math**

if aluminum cans are 65 cents per pound and I have 50 pounds what does this equal
*Thursday, September 18, 2014 at 6:30pm*

**Math**

Julia saw 5 times as many cars as trucks in a parking lot. If she saw 30 cars and trucks altogether in the parking lot, how many were trucks?
*Thursday, September 18, 2014 at 6:20pm*

**Math**

p+12<9 Solve the inequality A. p>21 B. p>3 C. p>-21 D. p>-3 Is the answer D?
*Thursday, September 18, 2014 at 5:52pm*

**Math**

Translate the following statement into an inequality: Five less than a number is at least nine. A. x-5>9 this arrow has a line under it** B. x-9>5 C. x-5>9 D. x-5<9 this arrow has a line under it. Is the answer A??
*Thursday, September 18, 2014 at 5:48pm*

**Math**

A survey found that 12 out of 15 people prefer hamburgers over pizza. If 65 people are surveyed the next week, how many people will choose hamburgers? How do I work this problem?
*Thursday, September 18, 2014 at 5:25pm*

**Math**

p+12<9 Solve the inequality A. p>21 B. p>3 C. p>-21 D. p>-3 Is the answer D?
*Thursday, September 18, 2014 at 5:25pm*

**Math**

For N balls, m are black and the rest white,what is the probability that in the first n balls from N, 1 of them are black. Here m< N.
*Thursday, September 18, 2014 at 5:20pm*

**Math**

Solve each inequality y+5>7 The arrows are supposed to have lines under them but I can't figure out how to put them. A. y<2 B. y<12 C. y>2 D. y>12 Is the answer A?
*Thursday, September 18, 2014 at 5:18pm*

**Math**

m-7<6 Solve each inequality A. m<-1 B. m>1 C. m<13 D. m<-13 Is the answer C?
*Thursday, September 18, 2014 at 5:07pm*

**Math**

Calculate the dot product Ā·Ê(where Ê = Ē/E ~ is the unit vector in the direction of Ē ) and plot both Ā and Ê, showing how Ā·Ê is the projection of Ā on Ê. Ā= −4ˆi + 3ˆj Ē= 12...
*Thursday, September 18, 2014 at 5:04pm*

**Math**

1. Benny is setting up fish tanks at the pet store. He has 8 angel fish, 12 tiger barbs , and 24 guppies. If he wants to have the same number of each kind of fish in every tank, what is the greatest number of tanks he can set up?
*Thursday, September 18, 2014 at 5:01pm*

**math:ratios**

Lamika buysc12 packs of juice boxes that are on sale and pays a total of $48 by using ratio table to determine how much will Lamika pay to but a 8 more packs of juice boxes at the same store.
*Thursday, September 18, 2014 at 5:00pm*

**math**

John as building a new fence and wants it to stand 81/2 feet above ground level to make sure its secure he must place it 23/4 feet into the ground.how long of a post should john buy?
*Thursday, September 18, 2014 at 4:58pm*

**Math: Pattern**

Use the rule to write the first 12 terms in the pattern. Rule: Add 10,Subtract 5 First term: 11 (IM HAVING TROUBLE THIS IS ONE OF MY WEAKNESSES)
*Thursday, September 18, 2014 at 4:54pm*

**Math**

The perimeter of a rectangle is 122 feet and the length is 10 times longer than twice the width. Find the dimension.
*Thursday, September 18, 2014 at 4:16pm*

**math calculus 3**

find a formula for a function g( x,y,z) whose level surfaces are planes parallel to z=3x-2y+7
*Thursday, September 18, 2014 at 4:11pm*

**math**

stamjps are sold in bookiets of 100,50, and 10.find as many different ways to buy 200 stamps as you can. record your work in the chart. could you give me some examples...please!
*Thursday, September 18, 2014 at 4:07pm*

**math 4th grade**

Find two numbers the exact answer is between 3x567
*Thursday, September 18, 2014 at 3:44pm*

**math**

what is -18/-13
*Thursday, September 18, 2014 at 3:34pm*

**math**

What is the solution of the equation 4t=64?
*Thursday, September 18, 2014 at 3:29pm*

**math grade 4**

James has 12 seashells mounted in a row. The 6 shells in the center of the row are nautilus shells. Is there the same number of shells on either side of the nautilus shells?
*Thursday, September 18, 2014 at 3:17pm*

**math**

what is 1 fourth times 8
*Thursday, September 18, 2014 at 2:19pm*

**Math**

A designer is designing a cylindrical punching bag. He wants to use a maximum of 1.3m^2 of material. He has determined that the diameter of bag should be 36cm. Determine the maximum possible height of the bag to nearest tenth if a centimeter. Please help and show steps on how ...
*Thursday, September 18, 2014 at 2:13pm*

**Math**

a) the value of t1 and d (2 marks) b) an explicit formula for the general term (2 marks) c) t20 (2 marks) 3a, 3a – 2b, 3a – 4b, 3a – 6b, …
*Thursday, September 18, 2014 at 1:56pm*

**Math**

b) an explicit formula for the general term (2 marks) c) t20 (2 marks) 7/4, 1, 1-4, -1/2
*Thursday, September 18, 2014 at 1:43pm*

**Math**

Calculate the dot product Ā·Ê(where Ê = Ē/E ~ is the unit vector in the direction of Ē ) and plot both Ā and Ê, showing how Ā·Ê is the projection of Ā on Ê.
*Thursday, September 18, 2014 at 1:40pm*

**Math**

For each arithmetic sequence, determine a) the value of t1 and d (2 marks) b) an explicit formula for the general term (2 marks) c) t20 (2 marks) 7/4, 1, 1/4, -1/2
*Thursday, September 18, 2014 at 1:38pm*

**Math**

Determine whether each sequence is geometric, arithmetic, or neither. Justify your answer. 1/5, 1/4, 1/3,1/2,1
*Thursday, September 18, 2014 at 1:38pm*

**Math**

Find the value of term 1 given sum 8= - 3280a and the common ratio = - 3?
*Thursday, September 18, 2014 at 12:47pm*

**math**

What is (-7)^5 in expanded form? 1.-7*-7*-7*-7*-7 2.-7*5 3.(-7)*7*(-7)*7*-7 4.5*5*5*5*5*5*7 IS IT D
*Thursday, September 18, 2014 at 12:43pm*

**Math**

A Registered Education Savings Plan (RESP) earns interest at a rate of 5% per year, compounded annually. Jasmine’s parents invest $4000 in the account today. a) Determine an explicit formula to represent the value of the investment. (2 marks) b) Use your formula to write ...
*Thursday, September 18, 2014 at 12:42pm*

**MATH WORD PROBLEM**

Lisa needed to borrow money from Kim. Kim said to he would have to pay him back one and half times the original sum plus $20. Kim paid a total of $200. What was the original amount Lisa Borrowed?
*Thursday, September 18, 2014 at 12:37pm*

** math**

Which of the following situations describe quantities that combine to make 0? During the top of the fourth inning of a baseball game, the Ravens scored three runs. During the bottom of the fourth inning, the Raiders scored five runs to tie the game. Jacoby went on a hiking ...
*Thursday, September 18, 2014 at 12:33pm*

**Math**

The first prize in a lottery is $250 000. Each winner chosen after the first is paid 20% as much as the winner before them. b) Determine an explicit formula for the general term. (2 marks) c) Determine a formula for the sum of n terms of the geometric sequence. (2 marks) d) If...
*Thursday, September 18, 2014 at 12:26pm*

**math**

If sales tax is 1/16 of the price and the price is $16 how much tax do I pay?
*Thursday, September 18, 2014 at 7:01am*

**math**

3px-3pt-x+y
*Thursday, September 18, 2014 at 6:52am*

**math**

Each interior angle of a regular polygon is 140 degree. the number of sides of the polygon is?
*Thursday, September 18, 2014 at 4:57am*

**math**

The ratio of two numbers is 3:4 and their HCF is 6. Their LCM IS?
*Thursday, September 18, 2014 at 4:55am*

**math**

if 150 is the third proportional to 6 and x ; find the value of x.
*Thursday, September 18, 2014 at 4:09am*

**Math algebra**

what do you call an alligator that sneaks up and bites you from behind
*Thursday, September 18, 2014 at 4:05am*

**math**

A fraction becomes 1/2 when 3 is subtracted from its numerator. If 5 and 7 are respectively added to its numerator and denominator, it becomes 3\4 then, the LCM of the numerator and denominator of the said fraction,must be
*Thursday, September 18, 2014 at 4:04am*

**science/math**

a skateboarder traveling at 7.0 meters per second rolls to a stop at the top of a ramp in 3.0 seconds. what is the skateboarders acceleration? is 2.3m/s correct
*Thursday, September 18, 2014 at 12:30am*

**science/math**

a cyclist accelerates at a rate of 7.0m/s^2. how long will it take the cyclist to reach a speed of 18m/s? my answer is 2.5seconds. is this correct?
*Thursday, September 18, 2014 at 12:28am*

**science/math**

after traveling for 6.0 seconds, a runner reaches a speed of 10m/s. what is the runners acceleration? my answer is 60m/s , is that correct?
*Thursday, September 18, 2014 at 12:26am*

**science/math**

a car starting from rest accelerates at a rate of 8.0 m/s. what is its final speed at the end of 4.0 seconds?I got 32m/s, is this correct
*Thursday, September 18, 2014 at 12:23am*

**Math**

How do you reflect -0.25x + 5 across the x-axis?
*Thursday, September 18, 2014 at 12:22am*

**science/math**

as she climbs a hill, a cyclist slows down from 25mi/hr to 6mi/hr in 10 seconds. what is her deceleration? my answer is -1.9 is this correct or should it be a positive 1.9...am confused
*Thursday, September 18, 2014 at 12:20am*

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