Tuesday
April 21, 2015

# Homework Help: Math

## Recent Math Questions

Math please help
In triangle PQR, we have <P = 30 degrees, <Q = 60 degrees, and <R=90 degrees. Point X is on line PR such that line QX bisects <PQR. If PQ = 12, then what is the area of triangle PQX? I have determined that i need to use the equation PR/\sqrt{3}, but i cannot find PR.
Wednesday, April 1, 2015 at 11:25pm

math please help
Point X is on line AC such that AX = 3 CX = 12. If <ABC = <BXA = 90 degrees, then what is BX? I'm having a really hard time drawing this out. Is there an easy equation to use for this that won't include drawing it?
Wednesday, April 1, 2015 at 11:06pm

Math (ASAP)
Find the variable for the following 3x3 matrix. |x 3 -1 2 1 -2 4 1 x|
Wednesday, April 1, 2015 at 10:19pm

math please help
Find the area of triangle ABC if AB = BC = 12 and <ABC = 120 degrees Should approach this with SSS similarity? If yes will the answer be clear or will i need to manipulate it, and how.
Wednesday, April 1, 2015 at 10:17pm

math
what is 4(y*y)? is it 4y*4y, or can u not distribute, and why?
Wednesday, April 1, 2015 at 9:41pm

Math, please help
Dennis will roll two number cubes once. Each cube is labeled 1 to 6. What is the probability that the sum of the cubes will be an odd number?
Wednesday, April 1, 2015 at 8:45pm

Math
How do I solve this inequality? 3x<12
Wednesday, April 1, 2015 at 8:41pm

math
A painting is hung on a wall in such a way that its upper and lower edges are 10 ft and 7ft above the floor, respectively. An observer whose eyes are 5 ft above the floor stands x feet from the wall. How far away should the observer stand to maximize the angle subtended by the...
Wednesday, April 1, 2015 at 8:41pm

7th grade math
Can you check the following? 1. (-1/3)x = -5 multiply both sides by -3 because dividing by fraction is same as multiplying by its reciprocal, right? Ans: -5(-3)= 15 2. x - (-3) = -8 + (-3) + (-3) x = -11 3. The signup fee to join Flexible Fitness Gym is $25. The monthly fee is... Wednesday, April 1, 2015 at 8:26pm math Writ anumerical. Expression for each word phrase 18 less 25 Wednesday, April 1, 2015 at 8:15pm Math Find the variable for the following 3x3 matrix. |x 3 -1 2 1 -2 4 1 x| Note: This entire matrix =10 Wednesday, April 1, 2015 at 8:13pm math (urgent) A basketball or some stadium holds 20000 people. On average 140000 come to see the match. Average ticket price is$75. market research shows that if ticket price is decreased by $5 800 more people buy tickets. Find the price that will maximize revenue and find maximum revenue? Wednesday, April 1, 2015 at 6:54pm math On a centimeter dot grid, draw all possible rectangles with a perimeter of 14 cm and sides whose lengths are whole centimeters. Wednesday, April 1, 2015 at 6:25pm Math 1. Ashlyn took out a loan for$700 to buy a new Tv. The bank to going to charge her 3% compound interest. What amount will Ashlyn owe the bank after 3 years 2. Determine the value of a $100 investment earning 10% compound interest over 2 years. Wednesday, April 1, 2015 at 6:18pm math solve the equation 6y-2=8y-5 Wednesday, April 1, 2015 at 5:58pm Math A television company agrees to establish a community antenna in a new suburb at a charge of$5 each for 1000 subscribers or less.To encourage more subscribers,it is agreed to give a discount of $0.10 to each subscriber for every additional 10 subscribers in excess of 1000. ... Wednesday, April 1, 2015 at 5:15pm 7TH MATH HELP 3. What is the correct description for the translation of A to A'? A(10, 3) A'(1, 6) right 9; up 3 left 9; down 3* right 9; down 3* left 9; up 3 The point C(x, y) is reflected over the x-axis. Use arrow notation to describe the original point and its reflection. (1 ... Wednesday, April 1, 2015 at 5:08pm Math / Algebra 2 Use trigonometric identities to solve each equation for the given domain. sin 2θ = -cos θ for 0 ≤ θ < 2π *Anyone who has any idea which identity to use is welcome to help. Wednesday, April 1, 2015 at 4:50pm Math What part of a yard is 1 1/2 feet? Wednesday, April 1, 2015 at 4:49pm Math the car on the hydraulic lift in figure 22-2 has a weight of 16,170 N. Piston B has a surface area of 5,005 centimeters cubed; Piston A has an area of 65 centimeters cubed. What force must be applied to Piston A to lift the call? I tried to do 16,170 by 5,005 but I dont think ... Wednesday, April 1, 2015 at 4:29pm Math Mrs. Birdsong charged a total of$3,450 for 30 pieces of her pottery. She charged the same amount for each of the remaining pieces. How much did she charge per piece if pottery?
Wednesday, April 1, 2015 at 4:08pm

Math
Are the following expressions equivalent? Prove your answer. 5(3x+2) and 15x+10
Wednesday, April 1, 2015 at 3:57pm

Math
If it costs $500 per ton to ship a vehicle, how much will it cost to ship a minivan that weighs 4,500 pounds? Wednesday, April 1, 2015 at 3:42pm Math Of 1901 people who came into a blood bank to give blood, 315 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure Wednesday, April 1, 2015 at 3:10pm math The vertices of ^ABC are A (2,-5), B(-3,5) AND c(3,-3) The Triangle is reflected over the x-axis. I think the answer would be A(2,-5), B(-3,5), C(3,-3) ->(-2,-5), (3,5), (-3,-3) Wednesday, April 1, 2015 at 2:59pm math help Given DC = 7, CB = 8, AB = 1/4 AD, and ED = 4/5 AD, find FC. Express your answer as a decimal. not sure how to tackle this one Wednesday, April 1, 2015 at 2:14pm math 1.A square has side lengths of 3 units. One of its vertices is at (5, -2). Which of the following are possible coordinates of another vertex? a)(9,-2) b)(8,-2) c)(5,5) d)(5,-1) idk can someone help i am confused Wednesday, April 1, 2015 at 1:55pm math help needed bad I'm really confused on how to answer this question. Can someone help me to figure this out? Thank you A survey about the student government program at a school finds that of 245 students: -218 like the program -27 students think this program is unnecessary. If a circle ... Wednesday, April 1, 2015 at 1:37pm Math What is the correct description for the translation of A to A? (10,3)-> (1,6) right 9; up 3 left 9; down 3 right 9, down 3 left 9; up 3 I think the answer is right 9;up 3 Wednesday, April 1, 2015 at 12:07pm math Solve for x and y simultaneously x+y=2 and 3x^2+4xy+y^2=6 Wednesday, April 1, 2015 at 11:14am Math The point C(3, -1)is translated to the left 4 units and up 1 unit. How do I write a rule to describe the translation? Wednesday, April 1, 2015 at 9:11am MATH AB and CD are two chords equidistant from the center O. OP is the perpendicular drawn from center O to AB. if CD=6 cm. find PB. Wednesday, April 1, 2015 at 3:33am MATH Find whether line represent by y=3 passes though oringin or not. Wednesday, April 1, 2015 at 3:32am MATH The force applied on a body of mass 5 kg is drirectiy proportion to the acceleration produce in the body. Represent this situation as a linear equation in two variable. Wednesday, April 1, 2015 at 3:32am MATH In the figure, ABCD is a parallelogram whose diagonals AC and BD meet at the point O. L and M are points on AC such that AL=CM. show that BMDL is a parallelogram. Wednesday, April 1, 2015 at 3:31am MATH If the total surface area of a sphere is 5544 cm 2, find the diameter of the sphere. Wednesday, April 1, 2015 at 3:31am MATH At what point, the graph of 3x -4y =12 intersects X axis and Y axis. Also find the coordinates of the point on the line when x =2 and x=6. Wednesday, April 1, 2015 at 3:31am MATH Write the equation Y=7 in the form ax+by+c = 0 and find the coordinates of the point where its graph cuts Y axis . Also find another solution of the given equation. Wednesday, April 1, 2015 at 3:30am MATH In the figure, ABCD is a parallelogram whose diagonal AC and BD meet at point O.L and M are points on AC such that AL=CM.show that BMDL is a parallelogram. Wednesday, April 1, 2015 at 3:30am MATH In the given figure, O is the center of the circle and <AOB=degree find the value of XYZ. Wednesday, April 1, 2015 at 3:29am MATH In <ABC, <A=60,<B=70,<C=50. Points D , E ,F are the mid-points of the sides BC ,AC and AB respectively. Find the measures of the angles of the triangle formed by joining the mid-points of the sides of <ABC. Wednesday, April 1, 2015 at 3:25am MATH P and Q are points on side BC of <ABC such that P and Q trisect BC. Show that ar(<PQA) = ar(<PAB) = ar(<AQC). Wednesday, April 1, 2015 at 3:24am MATH Fixed charge in a taxi is x and charges per km is y. if fare for 10 km is 70, then write the given data in form of a linear equation in two variables. Also,represent it graphically. What will be fixed charges, if charges per km are 5 rupee. Wednesday, April 1, 2015 at 3:23am MATH Write the equations of the lines drawn in the following graph. Also, find the area enclosed between them. Wednesday, April 1, 2015 at 3:23am MATH PQRS is a parallelogram. points A and B trisect the base P. Prove that ar(<ASB) = ar (<ARB) = 1/6ar (||gm PQRS). Wednesday, April 1, 2015 at 3:22am MATH In the given figure , AC and BD are chords of a circle that bisect each others at O prove that: (i) AC and BD are diameters. (ii) ABCD is a rectangle. Wednesday, April 1, 2015 at 3:22am math Construct a triangle QST, if the perimeter is 9.7cm, <S = 60 , <T= 50 Wednesday, April 1, 2015 at 3:21am MATH In a triangle ABC,medians BE and CD are produced respectively to points X and Y such that CD = DX and BE = EY as shown in the figure. show that points X,A &Y are col linear. Also,show that A is the mid point of XY. Wednesday, April 1, 2015 at 3:07am MATH A dome of a building where people live is in the shape of a hemisphere of radius 7m. 11 children decided to help the old aged people by collecting money for white washing the dome. If white washing costs rupees 2 per meter,how much would each children pay? Also find volume of ... Wednesday, April 1, 2015 at 3:07am MATH .The volume of a right circular cone is 100 pi cm 3 and its heightis 12cm find its slant height and hence its curved surface area. Wednesday, April 1, 2015 at 3:02am MATH A cardboard sheet is of rectanguler shape with dimensions 48m x 36m. From each of its corners,a square is cut off so as to make an open box. if the side of the square of the square is 8m, find the volume and lateral surface area of the box. Wednesday, April 1, 2015 at 3:00am Math Find all the possible values of the expression. sin^-1 -(square root3/2) Ans: 4π/3 + (2π)n 5π/3 + (2π)n Wednesday, April 1, 2015 at 1:04am Math Your store’s average basket (transaction) size for the month of March was$11.50 and you believe the average basket size will remain the same for your store in April. One of your hourly employees had an average basket size of $9.00 for the month of March and averaged 125 ... Wednesday, April 1, 2015 at 12:49am easy math √(100 - 20√5 + 5 + 15 - 6√15 + 9) solve. Tuesday, March 31, 2015 at 11:58pm math I can't figure this one. At a math contest,12 problems were given. Five points were awarded for each correct answer,and two points were deducted for each incorrect answer. Matt's score was 39.How many correct answers did he have.5-2(12-5)=39,5-24+2=39,7=63,9 Tuesday, March 31, 2015 at 11:57pm Math I dont understand how to do this problem if someone can please help me to figure it out thank you. A survey about the student government program at a school finds that of 245 students: -218 students like the program -27 students think the program is uncessary If a circle graph... Tuesday, March 31, 2015 at 11:14pm Math Which of the following types of information is NOT suited for display on a scatter plot? A. Relationship between age and number of books read in a year. B. Relationship between height and shoe size. C. Relationship between calories sonsumed and body weight. D. Relationship ... Tuesday, March 31, 2015 at 11:05pm Math What percentage of the students who chose biking were girls? Chart Walking Boys= 3 Girls=6 Biking Boys=5 Girls=3 Skateboarding Boys=2 Girls=1 A. 30% B. 37.5% C. 40% D. none of these Is the answer D? Thank you Tuesday, March 31, 2015 at 10:47pm Math Find the value of the following matrix's. 1.) [-5 2 -8 -7] 2.) [3 -4 7 9] Tuesday, March 31, 2015 at 10:38pm Math What percentage of the boys chose walking? Chart Walking Boys= 3 Girls=6 Biking Boys=5 Girls=3 Skateboarding Boys=2 Girls=1 A. 30% B. 45% C. 25% D. None of these Is the answer A? Thank you Tuesday, March 31, 2015 at 10:20pm math What is 5/9, 15/16, 1/4, and 9/10 put in order from smallest to largest? Tuesday, March 31, 2015 at 10:12pm Math What percentage of the total students chose skateboarding? Chart Walking Boys= 3 Girls=6 Biking Boys=5 Girls=3 Skateboarding Boys=2 Girls=1 A. 10% B. 20% C. 30% D. None of these Is the answer D? Thank you Tuesday, March 31, 2015 at 10:12pm Math In a recent student government election , the ratio of students who voted for the winner to all the students who voted was 0.84. The number of students who voted was 75. How many votes did the winner get ? Tuesday, March 31, 2015 at 9:45pm math Pre algebra what should you do if you cant sleep Tuesday, March 31, 2015 at 9:14pm math I need a formula. At a math contest,12 problems were given. Five points were awarded for each correct answer, and two points were deducted for each incorrect answer. Matt's score was 39. How many correct answer did he have Tuesday, March 31, 2015 at 9:14pm math The distance to the nearest 100,000 km from the earth to the moon is given as 400,000 km. The average speed to the Nearest 500km/h is 3500km/h. Calculate the least and greatest time it takes the rocket to reach the moon I figured out the formula speed = distance / time but ... Tuesday, March 31, 2015 at 8:52pm MATH How could you find out which weighs more, one ton of pillows or one ton of bowling balls? Tuesday, March 31, 2015 at 8:16pm Math Sarah is lining a square tray with 1 inch square tiles. The side length of the tray is 9 inches. How many tiles does Sarah need? Tuesday, March 31, 2015 at 8:10pm MATH David took a survey of 12 people to find out what their favorite animal is. Of those, ⅓ of the people said they liked dogs best. How can you find out him many people liked dogs best? Tuesday, March 31, 2015 at 8:08pm MATH I'm sure what if this is the right answer that the question is looking for. since my eng. not that good i have hard time understanding. Please help me. Question: write a situation that can be modeled by the following linear system. Explain what each variable means, then ... Tuesday, March 31, 2015 at 7:59pm Math Between 6 A.M and 10 A.M the temperature rose by 5F. Between 10 A.M and 2 P.M the temperature rose by 6F. Between 2 P.M and 6 P.M the temperature rose by 0C. Would you be able to tell how much the temperature rose since 6 A.M? Why or why not? Tuesday, March 31, 2015 at 7:57pm Math A bathroom has a length of 10 feet and a width of 9 feet.Kade wants to put down tiles on the floor that are each 1 square foot.Then he will put a baseboard along the edges where the walls meet the floor.How many tiles does Kade need?How much baseboard does he need? Tuesday, March 31, 2015 at 7:44pm math - linear equation How do I write a system of equations that is linear and graph? Thanks Tuesday, March 31, 2015 at 6:19pm Math Lamar wants to slice a 35-ounce tomato and a 28-ounce tomato into pieces of the same weight. He finds the greatest common factor of the tomato weights to determine the weight of each piece. What is the greatest common factor of 35 and 28? Show your work. Use your answer to ... Tuesday, March 31, 2015 at 6:14pm Math if a recipe of 2 dozen cookies calls for 3 teaspoons of vanilla how much vanillia will i need for 50 cookies ? 7.3 1.5 teaspoon vanilla= one dozen x 4 dozens = 2.00 missing cookies. 12.5 x 4 = 50 .5x4= 2.00 divided by 1.5 = 1.3 +6 (2servings of 3 teaspoons) equals 7.3 Tuesday, March 31, 2015 at 6:09pm math help how do i solve for x and y x+y=2 and 3x^2+4xy+y^2=6 Tuesday, March 31, 2015 at 5:18pm Math Can mean be found from a histogram? Explain Tuesday, March 31, 2015 at 4:59pm Math 4. Which explains why the sequence 81, 3, 1/9,... is arithmetic or geometric? A)The sequence is arithmetic because it decreases by a factor of 1/27 B)The sequence is geometric because it decreases by a factor of 1/27 C)The sequence is arithmetic because it decreases by a ... Tuesday, March 31, 2015 at 4:21pm Math When interest is compounded once a year, the formula for compound interest is A=P(1+r)t in the formula, A represents the amount of money after t years, p represents the principal, and interest rate written as a decimal. If p=$500 r=3% and t=2 What is the amount of compound ...
Tuesday, March 31, 2015 at 4:02pm

math
Each side of an equilateral triangle is increasing at a rate of √3 cm/min. find the rate at which its area increasing when its edge is 12 cm long.
Tuesday, March 31, 2015 at 3:59pm

Math
1. Write a rule for the sequence. 8, -1, -10, -19 A) Start with 8 and add -9 repeatedly. B) Start with -9 and add 8 repeatedly. C) Start with 8 and add 9 repeatedly. D) Start with 8 and subtract -9 repeatedly.
Tuesday, March 31, 2015 at 3:58pm

math
Each side of an equilateral triangle is increasing at a rate of √3 cm/min. find the rate at which its area increasing when its edge is 12 cm long.
Tuesday, March 31, 2015 at 3:56pm

Math
Nina wants to buy a bicycle that costs $150.00. She had saved 6% of the total cost of the bike. How much money has Nina saved? How much does Nina have left to save before she can buy her bike? Tuesday, March 31, 2015 at 3:49pm math equilateral triangle is increasing at a rate of √3 cm/min. find the rate at which its area increasing when its edge is 12 cm long Tuesday, March 31, 2015 at 3:38pm math Each side of an equilateral triangle is increasing at a rate of √3 cm/min. find the rate at which its area increasing when its edge is 12 cm long Tuesday, March 31, 2015 at 3:33pm math Each side of an equilateral triangle is increasing at a rate of √3 cm/min. find the rate at which its area increasing when its edge is 12 cm long Tuesday, March 31, 2015 at 3:16pm Math 2. Given the data 12,39,21,18,24,17,12,25 a what is the outlier in the data? b what is the mean with the outlier? c what is the mean without the outlier A. 12;21;18.4 *** B. 12; 18.4; 21 C. 39; 21; 18.4 D. 39; 18.4; 21 Tuesday, March 31, 2015 at 2:34pm BUS math Bari Jay a gown manufacturer received an order for 600 prom dresses from China. Her cost is$35 a gown. If her markup based on selling price is 79%, what is the selling price of each gown? Round to the nearest cent.
Tuesday, March 31, 2015 at 2:03pm

Math
1. What are the mean, median, mode, and range of the data set given the altitude of lakes in feet: -11, -28, -17, -25, -28, -39, -6, and -46? A. Mean = -25, Median = - 26.5, Mode = -28, Range = 40*** B. mean = -25; median = -40; mode = -26.5; range = 28 C. mean = -26.5; median...
Tuesday, March 31, 2015 at 1:51pm

business math
Anny invests $8,500, at 6% interest, compounded quarterly for 12 years? Tuesday, March 31, 2015 at 1:03pm math given that the rectangle above has a perimeter of 34 units, find m<klj. round the answer to the nearest hundredth Tuesday, March 31, 2015 at 12:58pm Math Juanita invests$3,500, at 8% interest, compounded annually for 4 years?
Tuesday, March 31, 2015 at 12:36pm

MATH
716-{(1950/5 of 3)-(4+217/7)}
Tuesday, March 31, 2015 at 10:42am

math help
How do i solve for x (x^2-9)(2x+1)=0
Tuesday, March 31, 2015 at 9:42am

math help
how do prove that this equation has rational roots for all rational values of K 3x^2+kx-k=3x
Tuesday, March 31, 2015 at 9:39am

Math
Point M(4, 3) is translated according to the rule (x, y) (x+2,y-5). What are the coordinates of of M?
Tuesday, March 31, 2015 at 8:46am

Math, statistics
Problem 1: The PDF of exp(X) (6/6 points) Let X be a random variable with PDF fX. Find the PDF of the random variable Y=eX for each of the following cases: For general fX, when y>0, fY(y)= Solution: f_x(ln(y))/y When fX(x) = {1/3,0,if −2<x≤1,otherwise, we ...
Tuesday, March 31, 2015 at 8:34am

7th grade math (probability)- additional questions
Here are additional problems that weren't included in original post from 3/30. 4. There are 5 different color jolly ranchers in a bag - 10 cherry, 15 watermelon, 12 grape, 10 apple, and 8 raspberry. What is probability that you'll choose raspberry? Ans: 8/55 =.1454 = ...
Tuesday, March 31, 2015 at 7:25am

Math
Given an iterated map, ie. x_n+1 = 3* x_n / (x_n +1), how do we find all of its fixed points?
Tuesday, March 31, 2015 at 2:35am

math
square root of (24)(72)
Monday, March 30, 2015 at 11:27pm

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