Wednesday
July 27, 2016

# Homework Help: Math

## Recent Math Questions

Math: Inverse Function (Plz help)
Find the Inverse function of f: f(x)=8+[square root of(8+x)] f^(-1)(x)=_______, x>8
Thursday, June 9, 2016 by Jennifer

analytical math
rony who is sixteen years old, is four times as old as her brother. How old will Mary be when he is twice as old as her brother?
Thursday, June 9, 2016 by nehal

Math
Triangles ABC and DEF are similar. Find side AC. Round your answer to the nearest tenth. cm
Thursday, June 9, 2016 by Irma

Math
Please explain this to me because im really stumped here!!: The probability of winning a game is 20%. If you play 20 times, how many times should you expect to win? A.4 times B.10 times C.16 times PLEASE HELP!!!!
Thursday, June 9, 2016 by Myah

Math
What are the next three terms in the sequence? -6, 5, 16, 27 Answers: 38, 49, 60 37, 47, 57 36, 45, 54 36, 46, 57
Thursday, June 9, 2016 by Hannah Montana

math
Jordan has three bills in her wallet. They might be any combination of $5,$10, and/or $20 bills. a) Fill in the organized list to show ll the possible combination of bills. Thursday, June 9, 2016 by nawab MATH Create a rational function with a linear binomial in both the numerator and denominator. Part 1. Graph your function using technology. Include the horizontal and vertical asymptotes and the x- and y-intercepts on your graph. Label the asymptotes and intercepts. Part 2. Show ... Thursday, June 9, 2016 by MOM math what is the surface area of cardboard box? l= 4cm w= 5cm h=10cm Thursday, June 9, 2016 by sunil Math Create a rational function with a linear binomial in both the numerator and denominator. Part 1. Graph your function using technology. Include the horizontal and vertical asymptotes and the x- and y-intercepts on your graph. Label the asymptotes and intercepts. Part 2. Show ... Thursday, June 9, 2016 by John Math You shop for bikes and find 7 types priced at 119 139 149 179 189 199 and 209. you want to buy the 189 bike would you use the mean median and mode to convince your parents that this is a reasonable price for a bike? explain Please help me Thursday, June 9, 2016 by PLEASE HELP math Create a quadratic polynomial function f(x) and a linear binomial in the form (x − a). Part 1. Show all work using long division to divide your polynomial by the binomial. Part 2. Show all work to evaluate f(a) using the function you created. Part 3. Use complete ... Thursday, June 9, 2016 by ted Math(Please Help Assignment Due) Consider the following pattern involving fractions: 15/20=3/4, 15-3/20-4=12/16=3/4 18/15=6/5, 18-6/15-5=12/10=6/5 1.) Make a conjecture about the pattern. Show that the conjecture is true for another example. 2.) Explain how inductive reasoning can be used to support the ... Thursday, June 9, 2016 by Jenny Math What must be true about the solution to this system of equations? x+4y+9z = -96 -2y+9z = -47 z = -7 a) The solution will describe the intersection point(s) of the 3 graphs. b) The value of z must be -7. c) The solutions will have values for x, y, and z. d) All of the above ... Thursday, June 9, 2016 by David Math Elizabeth claims that she has proven that 7=5with the following: 7(a+b)-5(a+b)=7c-5c 7a+7b-5a-5b=7c-5c 7a+7b-7c=5a+5b-5c 7(a+b-c)/(a+b-c) = 5(a+b-c)/(a+b-c) 7=5 1.) Explain why this is an invalid proof. Thursday, June 9, 2016 by Jenny math find the height of a pyramid whose square base measures 30yd on each side and whose slant height it 45yd? Thursday, June 9, 2016 by clark Math How do you find the height of a scalene triangle when the base and the two side lengths are different? The measurements are base - 12 cm one side - 8 cm the other side - 7 cm I need the height to find out the area Thursday, June 9, 2016 by Bianca math At the malt shop a large chocolate shake takes 8/9 of a pint of milk. If the medium shake takes 1/7 the amount of a large, how much does the medium shake take? Thursday, June 9, 2016 by Cindy math Air expands from 2 m3 to 3 m3 at constant pressure. If the initial temperature is 60 degrees Celsius, what is the final temperature? Thursday, June 9, 2016 by Anonymous math An ellipse and a hyperbola have the same foci,$A$and$B$, and intersect at four points. The ellipse has major axis 50, and minor axis 40. The hyperbola has conjugate axis of length 20. Let$P$be a point on both the hyperbola and ellipse. What is$PA \cdot PB$? Thursday, June 9, 2016 by clache math The figure below shows the ellipse$\frac{(x-20)^2}{20}+\frac{(y-16)^2}{16}​=2016$. [asy] defaultpen(linewidth(0.7)); pair c=(20,16); real dist = 30; real a = sqrt(2016*20),b=sqrt(2016*16); xaxis("x",c.x-a-dist,c.x+a+3*d​ist,EndArrow); yaxis("y"... Thursday, June 9, 2016 by rui rui math How many pairs of positive integers$(x,y)$are there which lie below the graph of the hyperbola$xy = 16$? Thursday, June 9, 2016 by rui rui Math/Dosage Calculations Hey there, still working through that packet. Could someone help explain how I would solve this problem? The answer in the packet says it's 420mL. Thanks in advance! Calculate the fluid intake in mL for the meal. Assume a glass holds 8 oz. 1/3 glass orange juice 1/2pt of ... Thursday, June 9, 2016 by Anonymous math/algebra The surface area of a rectangular prism is SA=2lw+2wh+2lh. The volume of a rectangular prism is V=lwh. Write an expression for the ration of surface area to volume. Thursday, June 9, 2016 by james math 1. Marry works in a factory that prudes 1,000 telephones each day when 30 telephones were sampled it was found that 9 were defective estimate how Manny telephones are defective each day. 314 telephones 284 telephones 300 telephones*** 310 telephones 2. A ice cream shop offers ... Thursday, June 9, 2016 by sam math Find an equivalent ratio for the ratio 6 to 7. Thursday, June 9, 2016 by Anonymous Math What is the answer to My hundreds digit is the last odd number. Five less than my hundreds digits is my ones and my tens digit is to more than my ones digit. My thousands digit is three less than my hundreds digit. Thursday, June 9, 2016 by Jasmine Math In a class of 100 students, 40 offer Biology and 10 offer Chemistry and Biology .10 offer Physics and Chemistry , and 30 offer Physic and Biology . Each student offer at least one of the three subjects. The number of students who offer Biology is equal to those who offer ... Thursday, June 9, 2016 by Delson Math A cylinder of curved surface area 1250m² is formed from a rectangular metallic sheet .Find the dimensions of the rectangular sheet I its length is double its breadth? Thursday, June 9, 2016 by Rohit Math A metallic pipe is 0.7 cm thick .Inner radius of the pipe is 3.5 cm and length is 5dm .Find it's total surface area? Thursday, June 9, 2016 by Raghu Math - Year 10 - Simult. Equations Q) find the point of intersection y = 3x x^2 + y^2 = 10 Thursday, June 9, 2016 by Anonymous regents I have to take the Regents exam, but there are a great number of math regents exams. If I am in 11th grade,which one should I take??plz help , this is urgent! !😣 Wednesday, June 8, 2016 by Paul math Can your x-axis values be percents in a bar graph? Wednesday, June 8, 2016 by Anonymous Math Makes Sense Grade 3 Colour the spinner red and blue. Make it so that when the pointer is spun, the probability of landing on blue is 1 in 4. What is the probability of landing on red? Wednesday, June 8, 2016 by Sandra Math Makes Sense Grade 3 Make a spinner with 3 colours. I chose green, red and blue. Colour it so that when the pointer is spun, the probability of landing on the green is 2 in 4. What is the probability of landing on either of the other 2 colours. Wednesday, June 8, 2016 by Sandra Math Determine the intervals over which the function is increasing, decreasing, or constant. (Enter your answers using interval notation. If an answer does not exist, enter DNE.) f(x) = 4x + 2, x ≤ −2 x^2 − 10, x > −2 Wednesday, June 8, 2016 by Amy Hiddleston Math A cone-shaped pile of sawdust has a base diameter of 40 feet, and is 15 feet tall. Find the volume of the sawdust pile. Round your answer to the nearest hundredth if necessary. Use 3.14 Wednesday, June 8, 2016 by Lauren Math Tom has twice as much money as Gabi. Harry has 3 times as much money as Tom. Harry has$120. How much money does Gabi have?
Wednesday, June 8, 2016 by Shawn

Math
Lions spend about 5/6 of their days sleeping. How many hours a day does a lion sleep?
Wednesday, June 8, 2016 by Money

math
Find the constant as such that the function: f(x)= {x^2-a^2 x does not equal a {8, x equals a
Wednesday, June 8, 2016 by Kristen

Math
A fair coin is flipped four times. What is the probability that tails occurs exactly 3 times if it is known that tails occurs at least twice?
Wednesday, June 8, 2016 by Jessica

Math
n vans each carried 15 people to the soccer game. 30 people arrived in the cars. There were 75 people at the soccer game. How many vans, n, carried people to the soccer game.
Wednesday, June 8, 2016 by Vicky P

math
rosa and four friends earned money from their combined garage sale.After Rosa spent $2 out of her earnings she had$15 left. How much money n, did the combined garage sale earn?
Wednesday, June 8, 2016 by Tommy

Math
5. Find 4 ratios equivalent to 30% Show work please thank you
Wednesday, June 8, 2016 by Valeria

Math
5. Find 4 ratios equivalent to 30% 6. Find 4 ratios equivalent to 25%
Wednesday, June 8, 2016 by Valeria

math
I'm really struggling with this word problem, please help. Alex is selling tomatoes. last week he bought some at $20 for 50 tomatoes and sold them (except for 30 rotten ones) at 120c each to make$84 profit. how many tomatoes did he buy?
Wednesday, June 8, 2016 by Andrea

Math
Tracy has one can of iced tea mix. One scoop of the mix makes two servings of iced tea. The scoop holds 1/12 of a can. How many servings of iced tea can Tracy make?
Wednesday, June 8, 2016 by Molly

Math
rickys age is 12 years less than 3 times his cousins age. if Ricky is 30 what is n, the age of Ricky's cousin? is n=6
Wednesday, June 8, 2016 by Christopher Pham

Math
A grapefruit is 8% heavier than an orange, and an apple is 10% lighter than the orange. By what percentage is the apple lighter than the grapefruit?
Wednesday, June 8, 2016 by Anonymous

Math
A grapefruit is 8% heavier than an orange, and an apple is 10% lighter than the orange. By what percentage is the grapefruit heavier than the apple?
Wednesday, June 8, 2016 by Anonymous

Math
Order the volumes from least to greatest. 1) 56.18 2) 43.75 3) 9 4) 10.92
Wednesday, June 8, 2016 by Val

math(bearing)
Three points X,Y and Z lying in the same horizontal plane are such that the bearing of X and Y from Z are 300 and 280 respectively,/YZ/=13m if the bearing of Y from X is 220 Degrees, find the bearing of Z from Y.
Wednesday, June 8, 2016 by emeka

Math
1. o is the center of the given circle. The measure of angle o is 134*. The diagram is not drawn to scale. Assuming that lines that appear to be tangent are tangent, what is the value of X? A) 67 B) 46 C) 314 D) 268 When I solve this, i get B. But I've been told the answer...
Wednesday, June 8, 2016 by Tim

math
A rectangle has a width of 15 inches and a diagonal of 17 inches. Find the length of the rectangle in inches. 15^2 + b^2 = 17^2 225 = b^2 = 289 0 + b^2 = 289 – 225 B^2 = 64 B = SQRT of 64 = 8 The length of the rectangle in inches equals 8 inches.
Wednesday, June 8, 2016 by David

math
A suitcase measures 22 inches long and 16 inches high. What is the diagonal length of the suitcase to the nearest foot. 16^2 + 22^2 = C^2 256 + 484 = C^2 740 = C^2 SQRT of 740 = 27.20 in. The diagonal length to the nearest foot equals 2.26ft.
Wednesday, June 8, 2016 by David

Math
in a class of 60 students 30 like maths 25 like physics 30 like chemistry. if 10 like both physics and maths 5 like maths and chem and 5 like phy & chem and 3 like all the subjects. find student like none of subject if 100 students were surveyed
Wednesday, June 8, 2016 by Anonymous

Math
in a class of 60 students 30 like maths 25 like physics 30 like chemistry. if 10 like both physics and maths 5 like maths and chem and 5 like phy & chem and 3 like all the subjects. find student like none of subject of if 100 students were surveyed
Wednesday, June 8, 2016 by Dp

Math
1. O is the center of the given circle. the measure of angle O, is 134. The diagram is not drawn to scale. Assuming that the lines that appear to be tangent are tangent, what is the value of x? A) 67 B) 46 C) 314 D) 268 can someone please help? I saw an example with X having ...
Wednesday, June 8, 2016 by Tim

math
A suitcase measures 22 inches long and 16 inches high. What is the diagonal length of the suitcase to the nearest foot. 16^2 + 22^2 = C^2 256 + 484 = C^2 740 = C^2 SQRT of 740 = 27.20 in. The diagonal length to the nearest foot equals 2.26ft.
Wednesday, June 8, 2016 by David

Math
Consider an airplane headed N 60 degrees W at a speed of 400 mph. What wind direction at a speed of 75 mph will produce a resultant direction of N 50 degrees W?
Wednesday, June 8, 2016 by Beth

Math
1. What is the surface area of the cylinder in terms of pi? The diagram is not drawn to scale. A) 990 pi in^2 B) 342 pi in^2 C) 378 pi in^2 D) 504 pi in^2 The radius is 9 and the height is 19. when I solve this, no matter what the formula is, I always get 523, which means ...
Wednesday, June 8, 2016 by Tim

Math
1. O is the center of the given circle. The measure of angle O is 134*. The diagram is not drawn to scale. Assuming that lines that appear to be tangent are tangent, what is the value of X? A) 67 B) 46 C) 314 D) 268 I've never solved a problem like this without x having a ...
Wednesday, June 8, 2016 by Tim

Math
This may be confusing and I apologize. 1. What is the value of x? Round the answer to the nearest tenth. The diagram is not drawn to scale. The diagram is a circle with two triangles in the middle that touch the inside wall of the circle. where they meet is p. Where Triangle ...
Wednesday, June 8, 2016 by Tim

Math
1. The volume of a sphere is 1,476 pi m^3. What is the surface area of the sphere to the nearest tenth? A) 629.9 m^2 B) 672.4 m^2 c) 1,334.8 m^2 D) 1,973.5 m^2 Is the answer C?
Wednesday, June 8, 2016 by Tim

Math
1. What is the volume of the oblique cone shown? Round the answer to the nearest tenth. The diagram is not drawn to scale. A) 178.0 in^3 B) 4,539.6 in^3 C) 2,269.8 in^3 D) 1,513.2 in^3 The bottom is 17 inches and the height is 20. Is D correct?
Wednesday, June 8, 2016 by Tim

Math
1. What is the surface area of the pyramid shown to the nearest whole number? The diagram is not drawn to scale. The lengths are, 3ft as the base, 3ft as the width, and the height is going up at an angle on the outside face on the pyramid which is 8ft. A) 21ft^2 B) 48ft^2 C) ...
Wednesday, June 8, 2016 by Tim

math
A ship sails 50km on a bearing of 080 degrees calculate how far east it travels to the nearest tenth
Wednesday, June 8, 2016 by Roger

Math
1. What is the area of a regular octagon with an apothem 16 inches long and a side 19 inches long? Round the answer to the nearest inch. A) 144 in^2 B) 216 in^2 C) 1,216^2 D) 2432 in^2 Is the answer D? That's what I solved it.
Wednesday, June 8, 2016 by Tim

Math
1. What is the equation of the circle with center (-4,-3) that passes through the point (6,2)? A) (x-4)^2+(y-3)^2=25 B) (x-4)^2+(y-3)^2=125 C) (x-(-4))^2+(y-(-3))^2=25 D) (x-(-4))^2+(y-(-3))^2=25 I'm really not sure how to do this at all, so any help would be absolutely ...
Wednesday, June 8, 2016 by Tim

math
there are 8 men and 9 women on a committee. in how many ways can a sub committee of 2 and 3 women be chosen?
Wednesday, June 8, 2016 by adetola

Math, Year 10, Simult. Equations
How can i know if two lines/equations intersect on a graph, algebraically? For example, I have two equations: 1. -x^2 + 3x + 4, and 2. x - 4 Ty in advan.
Wednesday, June 8, 2016 by Anonymous

math
samaira spends2/5 of her pocket money to buy chocolates and gives1/9 of the remaining money to her sister she spends 3/4 of the rest of the money to buy a book and saves rest of it the fraction of money saved by her is
Wednesday, June 8, 2016 by vinita

Math
1. Subtract (4x + 2y) – (8x – 3y). –4x – y 12x – y 12x + 5y –4x + 5y 2. Determine the best name for the quadrilateral. Graphic rectangle rhombus trapezoid parallelogram 3. Which figure has rotational symmetry for an angle of rotation of 270°? ...
Wednesday, June 8, 2016 by Help me PLEASE

Math
Let a, b, and c be unit vectors, such that a+b+c=0. Show that the angle between any two of these vectors is 120 degrees. I proved this geometrically, but now my teacher wants a proof using vectors, and I don't know what to do.
Tuesday, June 7, 2016 by Katie

math
A toy rocket is launched straight up into the air with an initial velocity of 60 ft/s from a table 3 ft above the ground. If acceleration due to gravity is –16 ft/s2, approximately how many seconds after the launch will the toy rocket reach the ground?
Tuesday, June 7, 2016 by mitch

math
100*158
Tuesday, June 7, 2016 by pradeep

math
Find the foci of the ellipse whose major axis has endpoints $(0,0)$ and $(13,0)$ and whose minor axis has length 12.
Tuesday, June 7, 2016 by rui rui

Math (Circle Equations)
Write an equation with a radius of 2 inches and center point (-5,2) Would it be: (x+5)^2+(y-2)^2=2^2 ?
Tuesday, June 7, 2016 by Giovanni

Math
1. What is the area of the circle in terms of pi? The diameter is 4.9. A) 9.8 pi m^2 B) 12.005 pi m^2 C) 6.0025 pi M^2 D) 24.01 pi m^2 I've redid this problem over and over again, and I keep getting an answer that isn't one of the choices. The closest my answer is to ...
Tuesday, June 7, 2016 by Tim

Math help plz??
24. A radio signal travels at 3.00 x 10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54 x 10^7 meters? im guessing its 118 seconds but im not sure..
Tuesday, June 7, 2016 by othilia

Orienteering is a sport that involves navigating your way to a series of checkpoints with the aid of a map and compass. The goal is to find each point on the map as quickly as possible. A typical compass used for orienteering is divided into 360 degree where 0 degrees is north...
Tuesday, June 7, 2016 by Cameron

Math
1. The volume of a sphere is 1476 pi m^3 . What is the surface area of the sphere to the nearest tenth? A) 629.9 m^2 B) 672.4 m^2 C) 1,344.8 m^2 D) 1,973.5 m^2 Is the answer D?
Tuesday, June 7, 2016 by Tim

Math
1. O is the center of the given circle. the measure of angle O, is 134. The diagram is not drawn to scale. Assuming that the lines that appear to be tangent are tangent, what is the value of x? A) 67 B) 46 C) 314 D) 268 can someone please help? I saw an example with X having ...
Tuesday, June 7, 2016 by Tim

math
A grapefruit is 8% heavier than an orange, and an apple is 10% lighter than the orange. By what percent is the orange heavier than the apple?
Tuesday, June 7, 2016 by Anonymous

math
Constructing a parallelogram which size is 6cm and 9cm the angle between size being 60 degree menion the diagonal
Tuesday, June 7, 2016 by adrian jackson

Math (Polar to Cartesian Equation)
Convert the given polar equation to a Cartesian equation. r^2=4sec(theta)csc(theta)
Tuesday, June 7, 2016 by Ray

Math
Prove that the following Trigonometric Identity is valid: 1/(sin⁡(y)-1)-1/(sin⁡(y)+1)=​-2sec^2 (y) Please any help or clues on how to do this is needed. I have a sheet that tells me valid identities but nowhere on it has info on -2sec^2 (y) I am sooo ...
Tuesday, June 7, 2016 by kat

math
a piece of wood is divided into three pieces in the ratio 3 : 4: 2. the length of the longest piece is 72 cm. calculate the length of the pices of wood
Tuesday, June 7, 2016 by anaon

Math
What is the value of "x" if 25^2=x? 1.)125 2.)0 3.)625 4.)5
Tuesday, June 7, 2016 by :)

Math
1. The length of the hypotenuse of a 30-60-90 triangle is 7. Find the perimeter. A) 7/2+21/2 sqrt 3 B) 21+7 sqrt 3 C) 7+21 sqrt 3 D) 21/2 + 7/2 sqrt 3 Could someone please help me, I don't know how to do this. Thank you!
Tuesday, June 7, 2016 by Tim

Math
1. In ABC, A is a right angle, and m B=45*. Side CA also has a length of 17ft just to let everyone know. What is the length of BC? If the answer is not an integer, leave it in simplest radical form. The diagram is not shown to scale. A) 54 ft B) 17 sqrt 3 ft. C) 17 sqrt 2 ft. ...
Tuesday, June 7, 2016 by Tim

Math
1. A square is __________ a rectangle. A) always B) sometimes C) never D) inconclusive One site about rectangles said, yes. But I'm not sure that's the answer.
Tuesday, June 7, 2016 by Tim

Math
3. A quadrilateral ____________ has one pair of parallel sides. A) always B) sometimes C) never D) inconclusive Is the answer B? I kinda wanna say D, but I believe it's B.
Tuesday, June 7, 2016 by Tim

Math
1. What is the equation of the circle with center (-4,-3) that passes through the point (6,2)? A) (x-4)^2+(y-3)^2=25 B) (x-4)^2+(y-3)^2=125 C) (x-(-4))^2+(y-(-3))^2=25 D) (x-(-4))^2+(y-(-3))^2=25 I'm really not sure how to do this at all, so any help would be absolutely ...
Tuesday, June 7, 2016 by Tim

math
A park is in the form of a rectangle 100 m×80 mat. At the centre of the park there is a circular lawn. The area of the park excluding the lawn is 4150 m^2 find the radius of the circular lawn
Tuesday, June 7, 2016 by Neha

Math(DifferentQuestion,SameDescription)
Orienteering is a sport that involves navigating your way to a series of checkpoints with the aid of a map and compass. The goal is to find each point on the map as quickly as possible. A typical compass used for orienteering is divided into 360 degree where 0 degrees is north...
Tuesday, June 7, 2016 by Cameron

Math
The sum of three consecutive numbers is 66.Form an equation to represent this information and find these numbers
Tuesday, June 7, 2016 by Hazel

Math
35 1/2% to the nearest thousandth
Tuesday, June 7, 2016 by Nana

math
Lolita saved $5000 in a saving account which pays 12% interest compounded monthly. Eight months later she saved another$ 5000. Find the amount in the account two years after her first saving.
Tuesday, June 7, 2016 by omar