Monday
December 5, 2016

Homework Help: Math

Branches of Math

Recent Math Questions

math
what divided by 7 equals 15
Wednesday, November 23, 2016 by alex

math
I think of a number,multiply it by 3 and add 7.i get the Same answer if I multiply the number by 4 and subtract 12.find the number
Wednesday, November 23, 2016 by Juli

Math
The relationship of red ribbons to green ribbons is 10 : 1/4. How mini red ribbons are used for every 4 1/2 green ribbons?
Wednesday, November 23, 2016 by Tina

Math
I am a little unsure of how to answer this question: Write an inequality to represent the limit you may not exceed when spending to make your product. Here's the background information I have. You are going to decide on a summer business to start. Figure out what you will ...
Wednesday, November 23, 2016 by Donut Holstein

Math aglebra
I need help RIGHT NOW!!!!!!!!!!!!!! On the blueprints of Adam's office building, the length of his rectangular office space is 5 1/4 inches. If the actual length of Adam's office space is 10 1/2 feet, what is the scale of the blueprint?
Wednesday, November 23, 2016 by Chelsea

Math
A trapezium measures 9.5cm (b1) 17cm (b2) & 6cm (h). Now, divide the trapezium into a rectangle & a triangle to find their areas. Hence, find the area of the trapezium.
Wednesday, November 23, 2016 by Austin

math
2+3Log a
Wednesday, November 23, 2016 by Collins

Math
The figure is made up of two rectangles measuring 7cm by 3 and a square of side 4cm. Find the area of the figure.
Wednesday, November 23, 2016 by Austin

math
the perimeter of a farm is187.2m .if its width is 39m,then find the ratio between its length and width.
Wednesday, November 23, 2016 by ratios

Math
If a car travels 180km in 4hrs how much time will it take to cover 400km
Wednesday, November 23, 2016 by Mohammed Zayed Ali

MATH
The length of three sides of a triangle are (x+1)cm 2xcm and 3x+1)cm its perimeter is 30cm. Find the value of x and the length of wach sides of triangle
Wednesday, November 23, 2016 by Julaine

Math
Draw four non_collinear points on a paper and draw all possible line segments. How many line segments can be drawn.
Wednesday, November 23, 2016 by Diya

math
8x+9y=40 5x+3y=10
Wednesday, November 23, 2016 by ismail

Math
The number of diagonals D I a polygon of n sides is given in the formula D=n(n-3)/2. Use the formula to find: A. The number of diagonals in a polygon with 9 sides. B. The number of sides of a polygon with 90 diafonals.
Wednesday, November 23, 2016 by Raven

Math
Solve the set of linear equations by the matrix method. a+3b+2c= 3, 2a-b-3c= -8, 5a+2b+c=9, solve for a
Wednesday, November 23, 2016 by Tunde

Math
Consider ?C such that sin C = 7/25 a) What are the possible quadrants in which ?C may lie? b) If you know that cos C is negative, how does your answer to part a) change? c) Sketch a diagram to represent ?C in standard position, given that the condition in part b) is true. d) ...
Tuesday, November 22, 2016 by Katie

Math
An angle ? satisfies the relation csc ? cos ? = -1. A) Use the definition of the reciprocal trigonometric ratios to express the left side in terms of sin ? and cos ?. B) What is the relation between sin ? and cos ? for this angle? C) Determine two possible values for ?. - ...
Tuesday, November 22, 2016 by Henry

Math
1) A ladder that is 15m long is leaning up against a building. The ladder makes an angle of 30 degrees with the ground. a) Find an exact expression for the height at which the top of the ladder contacts the wall of the building. 2) A tree is anchored by a guy wire that is ...
Tuesday, November 22, 2016 by Jessica

math
Tanya and Greg are going skiing. Tanya is a seasoned skier while Greg is a novice, he only skied once before. They have a map that provides the coordinates for the top and bottom of each path. Tanya wants to ski the most challenging path while Greg wants to start off with an ...
Tuesday, November 22, 2016 by Hannah

math
There are five different sizes of wood planks used to build a deck. Before starting the project you must compare them and put them in ascending order. 3 ½ ft. 11/3 ft. 3.55 ft. 2.9 ft. 4.1 ft. Help plz.
Tuesday, November 22, 2016 by Hannah

math
Suppose a length of a side of the larger box is 12 inches. How many smaller boxes will fit inside the larger box?
Tuesday, November 22, 2016 by Darlene

Math
the jetstream is a strong wind current that flows across the united states. flying with the jetstream, a plane flew 3,000 miles in 5 hours. Against the same wind, the trip took 6 hours. Find the airspeed of the plane (the speed in still water). My answer: X=550 miles per hour
Tuesday, November 22, 2016 by Jessica

math
if the three sides of an equilateral triangle are 3x + 2, 2y - X and y + 3. find X and y and the perimeter of the triangle. kindly elucidate further on this question
Tuesday, November 22, 2016 by stephen

Math
9:2x=15:12 , so x= ..?
Tuesday, November 22, 2016 by lala

Math
The sum of 24 and Vanessa's age is 40
Tuesday, November 22, 2016 by Chris

math
the sum of two no is 50 .the smaller no is two third of the greater no.. find the no.
Tuesday, November 22, 2016 by Anonymous

Math
If someone uses 1/5 of their allowance then used 1/3 of the amount.what is the number sentence?
Tuesday, November 22, 2016 by Hey

Math
Lisa went to the store and bought 100 pounds of fruit for $100.00. The peaches were $10.00 a pound, the melons were $3.50 per pound, and the apples were $.50 per pound. How many pounds of each did she buy
Tuesday, November 22, 2016 by Melissa

MATH
iF A LIVING ROOM IS 11 FT BY 20 FT AND THE WALL HEIGHT IS 9FT AND 3 WALLS ARE PAINTED,HOW ANY PIECES OF WOOD TRIM BE NEEDED
Tuesday, November 22, 2016 by TRACEY bENBOW

Math
Cheryl does a 2 mile warm up trail run at one rate for half of her workout. In the same amount of time she runs an additional 3 miles at a rate that is 2 mph faster. Find Cheryl's rate for her 2 mile warm-up run and for the 3 mile portion of her run.
Tuesday, November 22, 2016 by Jaime

Math
The producer of a 30 minute tv documentary about world war 1 divided it into two parts. four times as much program time was devoted to the causes of the war as to the outcome. how long is each part of the documentary?
Tuesday, November 22, 2016 by Carly

10th Grade Math
6. Which three lengths CANNOT be the lengths of the sides of a triangle? A.25 m, 16 m, 10 m B. 15 m, 13 m, 12 m C. 18 m, 5 m, 10 m D. 8 m, 8 m, 15 I think its A And if I'm wrong please explain the answer
Tuesday, November 22, 2016 by Lilly

Math iniqualties and versitiles
3(4+5+6)=(3*4+3*5+3*6)=45 3(4+5+6)=3(15)=45 What are the ways to calculate these equations with distributive property?
Tuesday, November 22, 2016 by Lucy Plz Help me

math
Bob needs to mix 2 cups of orange juice concentrate with 3.5 cups of water to make orange juice. Bob has 6 cups of concentrate. How much orange juice can he make?
Tuesday, November 22, 2016 by Anonymous

Math
Explain how you can tell if your estimate answer is greater or less than exact answer to a multiplication problem
Tuesday, November 22, 2016 by Honest

Math
16 students have registered for a summer sports camp. they are to be divided into either a swimming or a tennis activity, with no more than 1- students in either group. in how many ways could the group in the tennis activity be chosen?
Tuesday, November 22, 2016 by HELP PLEASE

Math
A movie theater sold 3 adult tickets for every 5 children tickets. They sold 180 more children tickets than adult tickets. How many children tickets were sold and how many adult tickets were sold?
Tuesday, November 22, 2016 by Anonymous

Math
In Mrs. Wallace's science class one half of the students are boys of the boys 1/8 or left-handed what fraction of the students and Mrs. Wallace's science class are left handed
Tuesday, November 22, 2016 by Yfgjugfhuu

Math
How many different integers represent the sum of two or more members of the set {-4,-3,-2,-1,0,1,2,3,4}?
Tuesday, November 22, 2016 by Anonymous

Math
Use Stokes' Theorem to evaluate C F · dr where C is oriented counterclockwise as viewed from above. F(x, y, z) = xyi + 5zj + 7yk, C is the curve of intersection of the plane x + z = 8 and the cylinder x2 + y2 = 9.
Tuesday, November 22, 2016 by Anon

Math
Use Stokes' Theorem to evaluate S curl F · dS. F(x, y, z) = x2z2i + y2z2j + xyzk, S is the part of the paraboloid z = x2 + y2 that lies inside the cylinder x2 + y2 = 25, oriented upward.
Tuesday, November 22, 2016 by Anon

Math
Use Stokes' Theorem to evaluate S curl F · dS. F(x, y, z) = 2y cos z i + ex sin z j + xey k, S is the hemisphere x2 + y2 + z2 = 49, z ? 0, oriented upward.
Tuesday, November 22, 2016 by Tay

Math
If you have 150 pages in a book and you have read one thrid of it how many.pages have you read so far
Tuesday, November 22, 2016 by Kiara

math
express a/5 +4/b as a single fraction
Tuesday, November 22, 2016 by carston

Math
In a class 3/4 of the students in a class are girls. There are 28 boys. What fraction of the class are boys? How many students are in the class?
Tuesday, November 22, 2016 by Tiki

Math
The number is a 2 digit number greater than 5 and 12 the number is not divisible by 2 both digits of this number are the same the sum of the digits of this number is one less than half the number of days in november
Tuesday, November 22, 2016 by Amberlea

Math
The back-to-back stem-and-leaf plot below shows the ages of patients seen by two doctors in a family clinic in one day. Compare the ages of the patients of doctor 1 and doctor 2 using the mean and the median of each data set. Doctor 1 Doctor 2 | 3 | 5 9 2 0 | 2 | 0 0 2 3 6 8 7...
Tuesday, November 22, 2016 by Embershy

Math
3. The stem-and-leaf plot below could NOT represent which of the following? 1 l 1 2 2 7 7 2 l 4 4 7 3 l 3 5 6 8 9 Key: 3 l 5= 3.5 A. The average number inches of rain in June B. The height of plant seedlings, in inches*** C. The weight oh phonebooks, in pounds D. The height of...
Tuesday, November 22, 2016 by Embershy

MATH
What do you do to check whether a number is rational or irrational? In your explanation, use an example of an irrational and a rational number.
Tuesday, November 22, 2016 by Steve

Math
What is the result of converting 1500 yards into miles?
Tuesday, November 22, 2016 by Eric

Math (please check my answer!!)
What other information is needed to prove that the two triangles congruent by SAS? Picture description: there are two triangles showing line LT = line MQ and L=M A. <T = <Q B. <G = <N C. Line GT = line NQ << D. Line LG = line MN
Tuesday, November 22, 2016 by Sara

Math
Blue and yellow paint are mixed in the ratio 2:5 to make a new colour. 6 litres more of Yellow and Blue is taken. how many litres of each is mixed
Tuesday, November 22, 2016 by Ratio

Math
The number of girls and boys in a class are in the ratio 7: 5 and there are 8 more girls 10 boys. how many girls and boys are there in the class.
Tuesday, November 22, 2016 by Ratio

Math
Deposit $5 weekly in 40 yrs what is the balance
Tuesday, November 22, 2016 by Anonymous

MATH
WHAT IS THE ANSWER TO missing numbers to create equivalent ratios
Tuesday, November 22, 2016 by ZAMDRIA

math
I bought 12 dozens of eggs at Rs 7.20 per dozen .Eighteen eggs were broken .I sold the remaining eggs at the rate of Rs 7.50 per dozen .find my gain or loss.answer is Rs 7.65
Tuesday, November 22, 2016 by Shreya

math
16 X^2+y^2=16
Tuesday, November 22, 2016 by fasil

Math
The ratio of the number of cats to the number of dogs in an animal shelter was 2:3. After 120 cats were adopted, the ratio of the number of cats to the number of dogs became 3:7. Find the total number of cats and dogs in the animal shelter in the end?
Tuesday, November 22, 2016 by Dalisay

Math for "mercy" (2 days ago)
http://www.jiskha.com/display.cgi?id=147​9687911
Tuesday, November 22, 2016 by Writeacher

Math
Q. a^4 - 13a + 36 Factorise
Tuesday, November 22, 2016 by Anonymous

math
If a circle is circumscribing triangle xyz,find the radius of the triangle. Calculate the area inside the circle but outside the triangle
Tuesday, November 22, 2016 by Anonymous

Math
If a space shuttle traveling at 17 , 460 miles per hour how fast is it moving per minute
Tuesday, November 22, 2016 by Irene

math lit, tourism, business studies, dramatic arts
Good day I am in grade 12 and want to know what i can study at a university with these subject.
Tuesday, November 22, 2016 by Donatella Gould

Math
marvin wrote the following clues to describe a multiplication sentence. the product is close in value to 10. both factors are decimal number.the product has 3 decimal places.one factor is greater than one . The other factor is less than 1. Explain how you created your answer.
Tuesday, November 22, 2016 by Carmen

Math
If the roots of the quadratic equation ax^2+bx+c=0 are in the ratio r:1 prove that acr^2+(2ac_b^2)r+ac=0
Monday, November 21, 2016 by Shaima

math
Find the coterminal angles for 8pi/3. I found one: 8pi/3 - 2pi= 2pi/3 My textbook says that I should add subtract 4pi to find the other one and I'm very confused as to how you know what to add/ subtract.
Monday, November 21, 2016 by Emily J

math
what is 8/9 - 17/54
Monday, November 21, 2016 by teresa

Econ math/logarithms
If log with base b (2)=0.39 and log with base b (3)=0.61 evaluate the following. log with base b (8). Simplify your answer. How to start? I thought I am supposed to write log base b 2^3 but I don't seem to get an answer that would fit.
Monday, November 21, 2016 by Ben

math
on the assumption that IQ's are normally distribited in the population with a mean of 100 and a standard deviation of 20 findbthe proportion of peoples IQ's. what is the probability that a score picked at random will lie above score of 135, lie below score 90, what is ...
Monday, November 21, 2016 by quennie

Math fractions
kate is using fraction strips to add 4/10 and 4/5 she uses one whole strip to represent the sum. how many fifths strips does she need to complete the sum?
Monday, November 21, 2016 by Marcy

math
according to arrow impossibility theorem ,it is possible for voting method to satisfy every fairness criteria that the texbook discussed?
Monday, November 21, 2016 by laura

Math
Draw a model. Then,write the numerical expressions. 5 times the sum of 7 and 23.
Monday, November 21, 2016 by Bobby HELP

Math
I need help
Monday, November 21, 2016 by Jenny

Math
Draw a model. Then, write the numerical expressions. the sum of 21 and 4,doubled.
Monday, November 21, 2016 by Bobby HELP

math
A rectangular poster is to have 50 squared inches for printed matter. It is to have a 1? inch. margin on each side and a 2? inch. margin at the top and bottom. Find the dimensions of the poster so that the amount of paper used is minimized. Horizonatal width= Vertical Height=
Monday, November 21, 2016 by nick

math
What is the average rate of change of the function f(x)=20(1/4)^x from x = 1 to x = 2? Enter your answer as a decimal. Do not round.
Monday, November 21, 2016 by Jay

Math
Michael purchased a certain number of share of one stock for a total of $308. The second stock was selling for $3 less per share . Michael could have bought 6 more shares of the second stock for the same amount of money. How many shares of the first stock did Michael purchase...
Monday, November 21, 2016 by Khalilah

Math
Ricky took a survey in the fifth grade and found that 2/3 of the students ride the bus to school and 1/4 of the students walk. What fraction of the fifth grade students either ride the bus or walk to school?
Monday, November 21, 2016 by Mark

Math
From left to right the first three digits of a 4 digits number add up to 8 which digits could be in the ones place if the 4 digit number is divisible by 6
Monday, November 21, 2016 by Jenny

Math
The temperature Rose 13°f between noon and 5 p.m. and then fell 7°F from 5 p.m. to 10 p.m. if the temperature at Noon is 75°f what would the temperature be at 10 p.m.
Monday, November 21, 2016 by Bigdawgtayy

Math
2,48 >2,4 _ 1>2,463
Monday, November 21, 2016 by Lili

Math
The perimeter of the rectangle is 54 meters the lengthy of the rectangle is five less than three times with what is the lengthy of the rectangle
Monday, November 21, 2016 by Genevive

Math algebra
If two people working together can do a job in 4 hours how long will it take the slower person to do the same job if one of them is 3 times as fast as the other?
Monday, November 21, 2016 by Dila

Math
1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54*** b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode and the median of ...
Monday, November 21, 2016 by Embershy

Math
Write the number in two other forms 0.326
Monday, November 21, 2016 by Triston

Math
Carl shaded in the multiplication table.the products in the row are all even.the ones digits in the products repeat 0,4,8,2,6.what row does carl shade
Monday, November 21, 2016 by Addison

math
1+1
Monday, November 21, 2016 by anonymous

math
Dina can make six bracelets in an hour. At the same rate, how many bracelets could she make in each allotted time listed in the table? Separate each answer with a comma.
Monday, November 21, 2016 by zoe

Math
56 decreased by twice Craig's savings
Monday, November 21, 2016 by Anonymous

Math
An automobile assembly runs for 9 3/4 hours each day. Workers work 3/4 hours shifts. How many shifts are in each day? i put 9 3/4 divided by 3/4. But that's a decimal then i tried 3/4 divided by 3/4 but thats worse. Help me please.
Monday, November 21, 2016 by JadaBrooks

TIP MATH!
Explain how mental math can be used to estimate a 15% tip on a taxi ride that costs $23.25. PLZ HELP! BE VERY Descriptive on how you did this! I'm Sick Today So I've Barely Have Brains To Do This Today, So HELP!!!
Monday, November 21, 2016 by Agal

math
How do you find the function rule of x , and y, if you have both negative and positive integers.
Monday, November 21, 2016 by Raven

Math
a student answered 86 problems on a test and got a 98%. How many problems were on the test?
Monday, November 21, 2016 by Julie

math
area of a regular octagon of side 12.5
Monday, November 21, 2016 by Anonymous

math
(a) Differentiate (x^2 + 1)^4 (b) Hence find a primitive of 8x(x^2 + 1)^3 .
Monday, November 21, 2016 by zee

Math
Ivanna has scored 70 , 65 , 65 , 64 , and 62 on her previous five tests. What score does she need on her next test so that her average (mean) is 69 ?
Monday, November 21, 2016 by Amoiraine

Math
A man sold a chair and a table together for $1520 thereby, making a profit of 25% on chair and 10% on table. By selling them together for $1535 he would make profit of 10% on the chair and 25% on table. Find the cost price.
Monday, November 21, 2016 by Dy

Math
The perimeter of a rectangular field is 140m. If the length of the field is increased by 2m and its breadth decreased by 3m,the area is decreased by 66sq.m. find the length & breadth of the field.
Monday, November 21, 2016 by Dy

Math
If thrice of "A's" age 6 years ago be subtracted from twice his present age the result would be equal to his present age. Find "A's" present age.
Monday, November 21, 2016 by Ana

Math
Ten years ago the age of the father was four times of his son. Ten years hence the age of the father will be twice that of his son. The present ages of father & son are?
Monday, November 21, 2016 by Ana

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