Friday
October 21, 2016

# Homework Help: Math

## Recent Math Questions

math
let f be the function f(x)=x(x+2) Find and simplify f(x)-f(-x)/2x I tried pluggin in whatever is for x in the first equation and get an answer for each value but it isn't working out can someone please help thank you
Sunday, September 25, 2016 by madison

math
if, instead of assuming that the mean body temperature is 98.20 degree Ferinheight, we assume that the mean is 98.60 F(as many people believe), wht is the chance of randomly selecting 106 people and getting a mean of 98.20 degree F or lower? (continue to assume that the ...
Sunday, September 25, 2016 by Anonymous

math
A number when multipled by 3 exceed itself by 48 what is the number
Sunday, September 25, 2016 by prashant

MATH 6grade
Juan plans to build a bookcase to store his paperback books, DVDs, and CDs. He has lumber that he will use for the sides and back of the bookcase. The bookcase will have five shelves, and each shelf will be 2 1/2 feet. DVD cases are 9 16 inch wide. a. If Juan has 60 DVDs...
Sunday, September 25, 2016 by AMBER A.

math
show that in a quadrilateral abcd , ab+bc+cd+da>ac+bd .
Sunday, September 25, 2016 by deepak kumar

Math
a small plane flies due south with a speed of 112 m/s while a tailwind blows due south at 31 m/s. Draw and label a vector diagram and calculate the magnitude and direction of the plane's resultant velocity
Sunday, September 25, 2016 by Penn

Math
Find the distance between the two points: P1= ( -1,0) and P2= (2,4)
Sunday, September 25, 2016 by Irma

Math
Let f:[0,infinity) -> R be a differentiable function such that f'(x) >= f(x) > 0 for all x in [0,infinity). Construct a proof to show that f'(x) >= f(x) for all x in [0,infinity).
Sunday, September 25, 2016 by Annoymous

math
Volume of cicle
Sunday, September 25, 2016 by kelebohile

math
A Boy Is 6 years Younger Than His Sister.The Product Of Their Ages Is 135.Find The Ages
Sunday, September 25, 2016 by elvis

Math
Six years hence a man 's age will be three times his son 's age and three years ago,he was nine times as old as his son .find their present ages
Sunday, September 25, 2016 by Pooka

math
it takes 3 mins to fill a water tank using pipe A and 5 mins to fill the same tank using pipe b alone how long will it take to fill the water if pipes a and b are used together, in minutes and seconds?
Sunday, September 25, 2016 by rey

Math
Express 84 minutes as a fraction of 4 hours in lowest term?
Sunday, September 25, 2016 by Cebastian

math
there are 3000 fruits in a fruit stall. 65% of the fruit are apples. 10% of the fruit are oranges and the rest are pears. how many more apples than pears are there?
Sunday, September 25, 2016 by persentage

Math
Jacob opens a savings account on Jan 1 with a deposit of $250. Every other week$25 is deposited. The bank charges $3 for a processing fee monthly. How much will he have at the end of the year? Saturday, September 24, 2016 by Anonymous math 6th grade Juan plans to build a bookcase to store his paperback books, DVDs, and CDs. He has lumber that he will use for the sides and back of the bookcase. The bookcase will have five shelves, and each shelf will be 2 1/2 feet. DVD cases are 9 16 inch wide. a. If Juan has 60 DVDs... Saturday, September 24, 2016 by CASSIE math 6th grade Juan measured the location for the bookcase and realized that his shelves can be no more than 1 3/4 feet wide. a. What is the maximum number of shelves Juan could build for this new bookcase using the lumber he bought? b. How many DVD cases will he be able to store on each of ... Saturday, September 24, 2016 by CASSIE math 6th grade Juan measured the location for the bookcase and realized that his shelves can be no more than 13 4 feet wide. a. What is the maximum number of shelves Juan could build for this new bookcase using the lumber he bought? b. How many DVD cases will he be able to store on each of ... Saturday, September 24, 2016 by BarbaraC 6th grade math Juan has 28 paperback books. Each book is 11 4 inches wide. Will all his books fit on one shelf? If not, how many will fit and how many will have to go on another shelf? If yes, how many more paperback books, if any, will fit on the same shelf? Explain. Saturday, September 24, 2016 by Allen B Math 6th grade Juan plans to build a bookcase to store his paperback books, DVDs, and CDs. He has lumber that he will use for the sides and back of the bookcase. The bookcase will have five shelves, and each shelf will be 2 1/2 feet. DVD cases are 9 16 inch wide. a. If Juan has 60 DVDs... Saturday, September 24, 2016 by Jada math Please help me to answer in four different ways by ADDITION ONLY: QUESTION; CONNIE HAS 18 APPLE AND MAE HAS 16 APPLE, HOW MANY APPLE THEY HAVE? Saturday, September 24, 2016 by shirly Math 6th grade Juan plans to build a bookcase to store his paperback books, DVDs, and CDs. He has lumber that he will use for the sides and back of the bookcase. The bookcase will have five shelves, and each shelf will be 2 1/2 feet long. DVD cases are 9 16 inch wide. a. If Juan has 60 ... Saturday, September 24, 2016 by Jada Math/Chem Is it possible to get a negative percent as an answer to a problem Saturday, September 24, 2016 by Anonymous math Juan sells suits in a major department store on weekends.He earns a commission of 5% on the first 10 suits, and if he sells more than 10 He earns an additional 3% on the additional suits. Last weekend Juan sold 13 suits at a price of$250 each. What was his commission ? A( $... Saturday, September 24, 2016 by donna Math Information: Juan plans to build a bookcase t store his paperback books, DVDs, and CDs. he has lumber that he will use for the sides and back of the bookcase. Juan plans for his bookcase to have five shelves including, the top and bottom shelves. Each shelf will be 2 1/2 feet ... Saturday, September 24, 2016 by Josephine URGENT PLEASE ANSWER Math A 36 inch board is to be cut into three pieces so that the second piece is 3 times as long as the first piece and the third piece is 5 times as long as the first piece. If x represents the length of the first piece find the length s of all three pieces Saturday, September 24, 2016 by Colleen Math I have a question. My teacher wrote down that 0 is less than or equal to 10 is true. Why is that? Saturday, September 24, 2016 by Anonymous Math If you had an inequality x is less than or equal to 8 would you shade towards the origin or away from the origin Saturday, September 24, 2016 by Anonymous Math If you had an equation zero is less than or equal to 2 would you say that's true because 0 is less than 2 or false because it isnt equal to 2? What would I write down if it asked for T or F Saturday, September 24, 2016 by Anonymous Math-Algebra What is the value of 4^2 - 2(3 x 5 + 1)? My answer~ I took (3 x 5 + 1) = 16 x 4^2 = 16 - 2 = 14, and I got 254, but that's not on my answer recommendations, I don't understand this at all, plz help meh!! A.8 B.1 C.-16 D.-21 Saturday, September 24, 2016 by Fieroh Math Check My answers 2. Name the Property of Equality that justifies this statement: if P = q then p + s = q + s. A. Reflexive Property B. Multiplication Property C. Symmetric Property D Addition Property **** 3. Use the given property to complete the statement. Multiplication ... Saturday, September 24, 2016 by Lilly Math 2,383 -1,907 ---------- Saturday, September 24, 2016 by Faith Stats, Statistics, Math A Statistics professor assigned 10 quizzes over the course of the semester. He wanted to see if there was a relationship between the total mark of all 10 quizzes and the final exam mark. There were 229 students who completed all the quizzes and wrote the final exam. The ... Saturday, September 24, 2016 by Papi Math A room measures 6m by 8m to the nearest meter. A carpet tile measures 50cm exactly. What is the maximum number of carpets tiles that need to be bought to cover the floor of the rectangular room? Saturday, September 24, 2016 by Lucifer Math three numbers are in harmonic progression. their mean is 20.if the first term is twice the third term find the three numbers??? Saturday, September 24, 2016 by Fida Math When might I need to estimate a sum? Saturday, September 24, 2016 by Caleb Math Points P and Q are both in the line segment AB and on the same side of its midpoint. P divides AB in the ratio 2:3, and Q divides AB in the ratio 3:4. If PQ=2, then find the length of the line segment AB. Saturday, September 24, 2016 by Samhitha Math Village B is 7km due south of village A and village C is 9km due south of B. Village D is 8km from A and is due east of B. Find DB and DC. Saturday, September 24, 2016 by Jane math Connie has 18 and mae has 16 apple also. How many apple they have? Solve in four different ways. Saturday, September 24, 2016 by shirly Math 7 is subtracted from the quotient of 48 divided by sum of 5 and difference of 11 and 8 Saturday, September 24, 2016 by sumit Math If you want to add 2/3 and 3/5, you will find the LCM of the denominators then divide the LCM of the denominators and multiply it with the numerators then add it... Saturday, September 24, 2016 by Sheena Jane math Ron has a piece of rope 6 1/2 long,Tony has one that is 7 2/3m long.How long are their ropes if put together? Saturday, September 24, 2016 by lea Math The limit as x approaches negative infinity is (3x^5 + x + 2) / (8x^4 - 5) a. DNE b. 0 c. -3/8 d. 3/8 I think the answer is Choice C, but I was stuck between this answer and Choice D. Friday, September 23, 2016 by Dave VECTOR MATH In an orienteering race, you walk 100 m due east and then walk N70¡ÆE for 60 m. How far are you from your starting position, and at what bearing? Friday, September 23, 2016 by WON MATH VECTOR Nancy is a pilot in Canada¡¯s North. She needs to deliver emergency supplies to a location that is 500 km away. Nancy has set the aircraft¡¯s velocity to 270 km/h on a northbound heading. The wind velocity is 45 km/h from the east. Determine the resultant... Friday, September 23, 2016 by WON MATH VECTOR 1. Determine the resultant of each vector sum a) 45 km/h vertically and then 75 km/h horizontally. b) 300 m east and then 400 m N45¡ÆE Friday, September 23, 2016 by WON math when are annuity due payments made Friday, September 23, 2016 by jackie math ted Williams made deposits of 500.00 at the end of each year for eight years. the rat is 8% compounded annually. calculate the value of ted's annuity at the end of eight years Friday, September 23, 2016 by jackie math Solve. 3x < 18 A) x < 6 B) x > 6 C) x < 15 D) x > 54 Friday, September 23, 2016 by Anonymous Math 1, In one school, 5/6 of the 6th graders take a foreign language. of these students, 2/5 take French. a. What fraction of the 6th graders take French? 5/6 x 2/6= 1/3 b. If there are 150 6th graders,how many take French? 150/1 x 1/3 =5/3 ? Friday, September 23, 2016 by Chris Mac Math I just have a question. How would you explain how to graph information from a ratio table? Friday, September 23, 2016 by Matt-Please Help Math The coach of a junior league baseball team must choose 3 players to play as fielders from 9 young people who have tried out. In how many ways can these three players be chosen? Friday, September 23, 2016 by Eugene math Jennifer walked 4 miles in 40 minutes. Predict how far she would walk 6 minutes if she continues to walk at the same pace. Friday, September 23, 2016 by Anonymous Math A projectile is fired with an initial muzzle speed 190 m/s at an angle 60 from a position 5 meters above the ground level. Find the horizontal displacement from the firing position to the point of impact. I know that y=vsin(60)t-.5gt^2 and x=vcos(60)t. but I keep getting wrong... Friday, September 23, 2016 by Ken Math Fnd domain K(x)=6square root 2x+1 -5 and g(x)= 2x^3+ square root x+6 I think its all real numbers since there isnt a domain to determine... sooo im not sure if its right Friday, September 23, 2016 by Dilly Math A population of 41,250 increases each year by 2% Friday, September 23, 2016 by Lee Math , trigonometry From a point on the ground 20m from the base of a tree the angle of the elevation to the top of the tree is 47 degrees. Calculate the height the of the tree correct to the nearest metre ??? Friday, September 23, 2016 by Sarah Math If a. Bathroom area is 8500 inches. And the tiles are 6 by 13ins, what's the least amount of tiles needed to cover area? Friday, September 23, 2016 by Hadassah math The length of a rectangle is 1m more than its breadth. find it's length and breadth if the area is 12 Friday, September 23, 2016 by festo questo math the schematic of a rectangular patio is drawn 1/8 inch to a foot if the patio is 18 feet long what is the measure of the patios length on the schematic Friday, September 23, 2016 by mark Math 1. Which of the following numbers is an example of an integer? -15 * 0.252525 . . . 3/5 (fraction) Square root of 7 Friday, September 23, 2016 by Kiru math 13m+3−56m=−15 m=? Friday, September 23, 2016 by Haruhi Fujioka math 3n + 16 = 7n n=? Friday, September 23, 2016 by Haruhi Fujioka math 2k+9=7−3k k=? Friday, September 23, 2016 by Haruhi Fujioka math −2(x+2/3)+1=5 x=? Friday, September 23, 2016 by Haruhi Fujioka math The spinner below is used in a game, if you spin the spinner once what is the probability that it will land on a multiple of 3 or an even number Friday, September 23, 2016 by AnonymousAnonymous math 0.61m-1.51m=9 m=? Friday, September 23, 2016 by Haruhi Fujioka Engineering Math I don't know where to start on this one. A thermometer is taken from an inside room to the outside, where the air temperature is ten degrees Fahrenheit. After one minute the thermometer reads 40 degrees Fahrenheit, and after two minutes it reads twenty-five degrees ... Friday, September 23, 2016 by Erica 5th grade math insert in parentheses: 14+2=6+2x3+2 Friday, September 23, 2016 by john math n-2=10n+4 over 2 what is the value of n? Friday, September 23, 2016 by Mei misaki math a respie requires 2 cups of flour to make 10 servings and 8 cups of flour to make 40 servings. How many cups of flour are needed to make 30 servings Friday, September 23, 2016 by grace Engineering Math, Newtons Cooling Method Newton's equation for a free falling object with air resistance of mass m kilograms says that its velocity v(t) satisfies the DE mv'(t) = mg - kv(t) where g = 9.8 \frac{m}{s^2} and v(t) is measured in \frac{m}{s}. Suppose that k=2 \frac{kg}{sec} and that a ball of mass... Friday, September 23, 2016 by Erica Engineering Math An unknown radioactive element decays into non-radioactive substances. In 120 days the radioactivity of a sample decreases by 59 percent. What is the half life of the element? How long will it take for a sample of 100 mg to decay to 77 mg? The answer is not 93 day, I ... Friday, September 23, 2016 by Erica Math Is |-13| and -13 the same or different? Friday, September 23, 2016 by Mathhhhh Math find three consecutive positive integers such that 4 times the first 13 more than the third. Friday, September 23, 2016 by Kevin paniagua Math Math question: My plane arrived in Chicago 45 minutes later from Detroit. How fast was my plane which traveled at about 20000 altitude? Friday, September 23, 2016 by Lisa Math Determine whether the given numbers are solutions of the inequality. 6, -19, -18, -3 y-9>2y-2 Friday, September 23, 2016 by Nikki math You purchased a suit on sale for$220 that was originally priced for $275. what was the percent of discount? Friday, September 23, 2016 by Anonymous math Greg rubs the balloon on his wool sweater, and the charges on the balloon separate so that there are negative areas and positive areas. Which of these statements correctly describes what happens as a result? Friday, September 23, 2016 by Olivia (but call me Oli) Math Suppose f(t) = P0e^-0.3t grams of radioactive substance are present after t seconds. If 200 grams of substance are present initially, how much is present after 4 seconds? What is the half-life of the substance? Friday, September 23, 2016 by Freud Mark Math 5/16+7/16 Friday, September 23, 2016 by Eureka Math Ashleigh moed 50 lawns last Month. Keshia mored 40 less than twice than ashleigh. How many laws did Keisha moe Friday, September 23, 2016 by Anonymous math Jannah spent 2/3 hour doing her homework. How much minutes did she spent doing her homework? Friday, September 23, 2016 by lyza math (i)prove that 1/1+sintheta +1/1-sin theta=2sec^2 theta Friday, September 23, 2016 by Mayank Math How to compare 0.7 and 5/8 Friday, September 23, 2016 by Shawn math the numerator of a fraction is 3 less than the denominator. if 4 us added to the numerator and to the denominator, the resulting fraction is equivalent to 3/4. find the original fraction. Show your solution Friday, September 23, 2016 by mm math the numerator of a fraction is 3 less than the denominator. if 4 us added to the numerator and to the denominator, the resulting fraction is equivalent to 3/4. find the original fraction Friday, September 23, 2016 by mm Math If the revenues fron the extra 1/4% sales tax amounted to$48,136.47 in 1983 and is to be divided equally among 7 different departments within the city of Albuquerque, how much will each department receive ?
Thursday, September 22, 2016 by Amy

Math
If you purchase a tv and pay $40 down and$32.60 a month for 8 months, and what was the purchase price of the tv?
Thursday, September 22, 2016 by Amy

Math
Maggie has a ribbon 27 feet long what is the length of the ribbon in yards
Thursday, September 22, 2016 by Sincere

Math
Kelso created the scale drawing below what is the scale factor of his drawing 1 inch equals 8 feet the rectangle is 4 feet by 12 feet
Thursday, September 22, 2016 by ezzy

Math
How many choices do I have if I use three colors from red, white, yellow and blue
Thursday, September 22, 2016 by Kim

Math
A total of 120 students attend top view high school.the ratio of teachers to students is 1:30. Whats the answer
Thursday, September 22, 2016 by Karen

Math
How to do the coffee shop has nine pies
Thursday, September 22, 2016 by Mara

Math
How do you solve it in pictures
Thursday, September 22, 2016 by Mara

Math
What is this from least to greatest -8.2,0.4,-2 1/2,2.4 I got 0.4,-2 1/2,2.4.-8.2
Thursday, September 22, 2016 by Jenny

Math
120 students attend top view high school.the ratio of teacher to students is 1:30.
Thursday, September 22, 2016 by Karen

Math (Plz Help ASAP)
A navy submarine descended from sea leval at a rate of 7 feet per second. a. Write the decent rate as an integer b. Find the submarine's elevation after 10 min. I need help ASAP!!
Thursday, September 22, 2016 by Verna

math
One car is traveling at a speed of 242km/h and another one at a speed of 217km/h.In 12 hours,how much farther will the car that's traveling at 242km/h go than the car that's traveling at 217km/h?
Thursday, September 22, 2016 by Carlos

Math
Write and solve a real- world problem that can be solved using the expression 3/4 divided by 1/6?
Thursday, September 22, 2016 by Fred