Sunday
December 4, 2016

# Homework Help: Math

## Recent Math Questions

math
A certain number was increased 5 times, then decreased by 3, then halved. The result was 0.3 less than the original number. What was the original number?
Sunday, October 23, 2016 by tom

Math
Estimate f(5.9) given that f(6)=5 and f′(6)=3.
Sunday, October 23, 2016 by Ashley

Math
Express the given sums using sigma notation. 1/2+1/2×3+1/3×4+...1/99&time​s;100?
Sunday, October 23, 2016 by Girma

math
John was jogging at a rate of 5mph and he has a one half mile start on Sue who jogs at 7 mph. In how many minutes will it take before they meet?
Sunday, October 23, 2016 by Donna

math calculus
A poster is to contain 300 (cm square) of printed matter with margins 10cm at the top and bottom and 5cm at each side. Find the overall dimensions if the total area of the poster is minimum.
Sunday, October 23, 2016 by Aquino,Vanessa Mae

HOW DO YOU MULTIPLY 3,333 and 5?
Sunday, October 23, 2016 by Anonymous kid (no name pl

Before electricity, nights in towns and fields were often times pitch black, except when there was a full moon. How many times brighter is the noonday sun than the full moon when the moon is at the closest point to the earth? Model the moon as a sphere of radius 1,000 miles (1...
Sunday, October 23, 2016 by Dip

math
Please help. given the units for four of the six variables, what must be the units of z and y? a=m t=s/K h=N^4 x=m z^a=xh cos(yt)
Sunday, October 23, 2016 by lexy

Math Homework
The Men's 400 meter race 5th finisher LESLIE DJHONE from France 45.11/ The Women't 400 meter race 5th place finisher was ANASTASIA KAPACHINSKAYA from Russia 50.03. If both of those 5th finishers had completed in the semifinals of the 2013 World Championships with ...
Sunday, October 23, 2016 by Anonymous

math
An art class is making a mural for their school which has a triangle drawn in the middle. The length of the bottom of the triangle is x. Another side is 10 more than four times the length of the bottom of the triangle. The last side is 3 more than the bottom of the ...
Sunday, October 23, 2016 by Anonymous

math
Integration: integral (sin2x / rad (1+cos^2 x) ) dx=? integral (x / (x^2 -1)(ln (x^2 -1)) ) dx=?
Sunday, October 23, 2016 by fab.

Math
Two riders, A and B leave the starting line at the same time. A takes 12 minutes to complete one lap and the B takes 18 minutes. How long in minutes after they will it take for them to meet again at the starting line?
Sunday, October 23, 2016 by Anonymous

math
Gordon swims 4 metres for every 1 metre Maria swim. By how far in metres will Gordon beat Maria if the race is 50 metres?
Sunday, October 23, 2016 by Anonymous

Math
A bus leaves Town A on Saturday night and is supposed to arrive at Town B at 08:17 am on Sunday morning. If the estimated journey time is 10 hours 43 minute, at what time on Saturday should the bus leave Town A?
Sunday, October 23, 2016 by Lin

math
Write 360 as powers of its prime factors
Sunday, October 23, 2016 by Anonymous

math
write in index form 3/8 x 3/8 x 3/8
Sunday, October 23, 2016 by Anonymous

math
list the set of: counting numbers from 20 to 30
Sunday, October 23, 2016 by Anonymous

MATH
A farmer wants to fence a small rectangular yard next to a barn. Fence for side parallel to the barn will cost 50 per foot and the fence for the other two sides will cost20 per foot. The farmer has a total of 2000 dollars to spend on the project. Find the dimensions for the ...
Sunday, October 23, 2016 by LAY

math
1 1/2(n-4 1/2)=12 Solving equations involving the distributing property
Saturday, October 22, 2016 by Wossum

math
4. Thomas is at a store buying school clothes. T-shirts are on sale for \$13 each and jeans are on sale for \$18 each. a) Write an equation that represents the total cost for x T-shirts and y pairs of jeans. I need help with a.. b) Thomas bought six T-shirts and his total bill ...
Saturday, October 22, 2016 by Sasha

Math
2(p-2 1/3)= 12
Saturday, October 22, 2016 by Wossum

math (horizontal tangent line)
Determine the point(s) if any at which the graph of the function has a horizontal tangent line. y=x^3+x I graphed this function out and it looks like there isn't any horizontal tangents. Am I correct or am I forgeting something? I tried finding the derivitave of the ...
Saturday, October 22, 2016 by Ray

As a fringe benefit for the past 8 years, Colin's employer has contributed \$50 at the end of each month into an employee retirement account for Colin that pays interest at the rate of 8%/year compounded monthly. Colin has also contributed \$2,000 at the end of each of the ...
Saturday, October 22, 2016 by Tammie

Present Value Math
Find the present value of an ordinary annuity of \$500 payments each made quarterly over 6 years and earning interest at 8% per year compounded quarterly. ​ \$9,456.96 \$2,311.44 \$24,968.07 \$5,264.38 Thank you
Saturday, October 22, 2016 by Kal Jay

Math
2.6(m+1.9)=6.5 Solving equations involving distributing property
Saturday, October 22, 2016 by Wossum

Math (Calculus)
Determine if each of the following functions is in Big-O, is Big-Omega and is Big-Theta of x: (Could be multiple) a) f(x)=10 b) f(x)=3x+7 C) f(x)=x^2+x+1 d) f(x)=5log(x) e) f(x)=|x| f) f(x)=x/2 I'm in calc 1 and I have no idea what's it even asking me. Help? Thanks in ...
Saturday, October 22, 2016 by Ray

Math
12(p-2 1/3)=-8
Saturday, October 22, 2016 by Wossum

Math Homework
The following frequency table contains the total number of deaths worldwide as a result of earthquakes from 2000 to 2012. Year Deaths 2000 231 2001 21,357 2002 11,685 2003 33,819 2004 228,802 2005 88,003 2006 6,605 2007 712 2008 88,011 2009 1,790 2010 320,120 2011 21,853 2012 ...
Saturday, October 22, 2016 by Chris

The photographer wants to display her photograph in her studio A wall in her studio is 10 ft wide .She wants each picture to be 3 feet apart .If she displays photographs that are 4"wide by 6" high . How many photographs can she display side by side on her wall
Saturday, October 22, 2016 by Anna

Math
Pierce Publishing sells encyclopedias under two payment plans: cash or installment. Under the installment plan, the customer pays \$23/month over 2 yr with interest charged on the balance at a rate of 15%/year compounded monthly. Find the cash price for a set of encyclopedias ...
Saturday, October 22, 2016 by Kal Jay

Math
A car rental agency charges ​\$35 per day to rent a car and ​\$14.95 per day for a global positioning system​ (GPS). Customers are charged for their full tank of gas at ​\$3.40 per gallon. A car has a 19 gallon tank and a GPS. a) Write a function rule for ...
Saturday, October 22, 2016 by Steve

math
A line has a slope of -6 that passes through the point (-12,5). What is the equation of the line? a. 6x + y = -77 <-- or C? b. 6x + y = -67 c.-6x + y = 77 d.-6x + y = 17
Saturday, October 22, 2016 by Sasha

Math
Suppose you want to fence in a field, and then subdivide it into three equal parts. You have 2400 yards of fencing material to use. What should be the dimensions of one of the three smaller fields, if you want to fence in the maximum area?
Saturday, October 22, 2016 by sdf

Math
A car rental agency charges ​\$35 per day to rent a car and ​\$14.95 per day for a global positioning system​ (GPS). Customers are charged for their full tank of gas at ​\$3.40 per gallon. A car has a 19 gallon tank and a GPS. a) Write a function rule for ...
Saturday, October 22, 2016 by Steve

math
The value of a car decreases at a constant rate. After 1 year the value of the car is \$20,000. After 2 more yearsit is \$14,000. Write an equation in slope-intercept that represents the value y (in dollars) of the car after x years. What is the y-intercept of the line? In this ...
Saturday, October 22, 2016 by collin

MATH HELP PLEASE I HAVE NEVER BEEN MORE CONFUSED
The value of a car decreases at a constant rate. After 1 year the value of the car is \$20,000. After 2 more yearsit is \$14,000. Write an equation in slope-intercept that represents the value y (in dollars) of the car after x years.
Saturday, October 22, 2016 by sophia

math
The value of a car decreases at a constant rate as it grows older. When the car is 2 years old, it is worth \$23,000. When the car is 5 years old it is worth \$15,500. Write and equation relating y (value of the car \$) to x (age of car).
Saturday, October 22, 2016 by sophia

Math
Find the accumulated amount A if the principal, P = \$3700 is invested at the interest rate r = 7%/year for t = 12.5 years compounded semiannually. Round your answers to two decimal places. ​ a. The accumulated amount is \$8544.01. b. The accumulated amount is \$8592.56. c...
Saturday, October 22, 2016 by Jass

math
A model car travels horizontally after being released. The car travels a distaance d metres in a time of t seconds. d is directly proportional to t. The car travels 20 metres in a time of 2 seconds. A.Calculate the distance the car travels in 3 seconds.
Saturday, October 22, 2016 by Michelle

Math, Functionsons
What is the domain and range of the function f(x)=x^2-2? please teach me..!
Saturday, October 22, 2016 by Jiwon

Math
Write two that have given absolute value of 4,38,260,4092?
Saturday, October 22, 2016 by Amberly

Math
What is the distance between 86.25 to -17.75
Saturday, October 22, 2016 by alice

math
The value of a car decreases at a constant rate. After 1 year the value of the car is \$20,000. After 2 more yearsit is \$14,000. Write an equation in slope-intercept that represents the value y (in dollars) of the car after x years.
Saturday, October 22, 2016 by sophia

math
Fishing hook G is let down 2 1/2 times its present depth. where is fishing hook G now? FISHING HOOK G = -6 2/3
Saturday, October 22, 2016 by alice

math
Fishing hook E is dropped 2.5 times its present depth. where is fishing hook E now? NOTE: FISHING HOOK E is -7.1 is the answer -4.14 or -17.75
Saturday, October 22, 2016 by alice

Math, Functions
What is the Domain and Range of the function f(x)=2x+1 ? Please teach meeeee!
Saturday, October 22, 2016 by Jiwon

Math, Functions
If g(t)= 1/t-2-1, how to solve g(t)=0 ...? Please teach me..!
Saturday, October 22, 2016 by Chris

math
It takes 8 hours for one crew to clean an office building. It takes a second crew 10 hours to clean the same building. If the first crew works 2 hours and leaves and the second crew takes over to complete the job, how long will it take the second crew to finish cleaning the ...
Saturday, October 22, 2016 by Christos

Math
If there are 35 kids in a class and 22 are girls what is the ratio of girls to boys in the class
Saturday, October 22, 2016 by Nick

Math
A shopper keeper sold a total of 15 boxes of pencils on Monday and Tuesday. She still three more boxes on Monday then on Tuesday. There were 12 pencils in each box. How many pencils did she sell on Monday?
Saturday, October 22, 2016 by Gabriella

math
a gardner having 150 meters of fencing materials wishes to enclose a rectangular plot of land and also erect a fence across the land parallel to two of the sides.find the maximum area he can enclose
Saturday, October 22, 2016 by hemant

Math Physics Torque Equilibrium
A uniform meterstick pivoted at its center has a 100 g mass suspended at the 21.0 cm position. At what position should a 95.0 g mass be suspended to put the system in equilibrium? What mass would have to be suspended at the 80.0 cm position for the system to be in equilibrium?
Saturday, October 22, 2016 by Brandon

math
A bird beats it's wing 24 times per second. How many times will it beat it's wing in one hour
Saturday, October 22, 2016 by karen

math
design a container box yhat can be able to hold 15pieces of 4g candiy and has a parabola as the main theme of the design. use the correct mathematical equation in solving for the dimensions of the container.
Saturday, October 22, 2016 by boyd

math
Raj is deciding between two cell phone plans, A and B, which are both linear functions. The monthly charge for plan A according to the number of minutes used is shown in the table. Monthly Charge for Plan A Minutes used, x Monthly charge (\$), y 0 14.45 3 14.84 6 15.23 9 15.62 ...
Friday, October 21, 2016 by Regina

Math
Which equation(s) represents a proportional relationship? A) y = 5 + x B) y = 4x C) y = 7x² D) y = 2 - x
Friday, October 21, 2016 by Sara

math
c=65.94ft r=?
Friday, October 21, 2016 by dipbdrsorali

Math
Luke receives a salary of \$200 per week plus a 3% commission on all sales. Last week he sold \$2,100 in merchandise. How much did he make that week?
Friday, October 21, 2016 by Josh

Math *corrected myself*
he table shows the population of a school for the years 1992-2008. Year: 1992, 1994 1996, 1998, 2000, 2002, 2004, 2006, 2008 Population: 628, 656, 692,751, 793, 840 ,868, 902, 940 Which is the best prediction for the population in 2012? 1500 1100< or 1500 1175 2010
Friday, October 21, 2016 by Sasha

Math
The table shows the population of a school for the years 1992-2008. Year: 1992, 1994 1996, 1998, 2000, 2002, 2004, 2006, 2008 Population: 628, 656, 692,751, 793, 840 ,868, 902, 940 Which is the best prediction for the population in 2012? 1000 1100 <--- or 1000? 1150 2010
Friday, October 21, 2016 by Sasha

Math
3. (2.56 x 10^6) x (3.56 x 10^2) = a. 9.1136 x 10^12 b. 91.136 x 10^8 c. 9.1136 x 10^8 d. 91.136 x 10^12 4. In a recent year, the population of California was about 2.52 x 10^7 people. Its land area is about 4.05 x 10^5 km2. What was the average number of people per square ...
Friday, October 21, 2016 by Nick

Math
\$2,000 principal earning 3%, compounded annually, after 3 years.
Friday, October 21, 2016 by Dean

Math
Which is the greater amount of money, 120% of 0.3% of \$1000 or 120.3% of \$1000?
Friday, October 21, 2016 by Alyssa

Math
A total of 45 412 runners participated in the Vancouver Sun Run. Of these runners, 0.85% completed the run in under 40 min. How many runners completed in under 40 mins? In fact, 0.13% of the runners completed the run in less than 34 min. How many runners were in this group?
Friday, October 21, 2016 by Anne

Math
In set-builder notation, how do you write the soultions of the inequality? 5x+17>=7 A.{x|x>=2} B.{x|x>=-2} C.{x|x<=-2} D.{x|x<=2} 2. In set-builder notation, how do you write the solutions of the inequality? -4-x>=-2 A. {x|x>=-2 B. {x|x>=2 C. {x|x<=-...
Friday, October 21, 2016 by Anonymous

Math
For the pair of supply-and-demand equations, where x represents the quantity demanded in units of 1,000 and p is the unit price in dollars, find the equilibrium quantity and the equilibrium price. 2x + 9p - 93 = 0 and 3x - 14p + 108 = 0 a. equilibrium quantity 12,000 units; ...
Friday, October 21, 2016 by Kal Jay

algebra
someone help please im homeschooled and dont understand math at all, its my weakest subject :( If y varies inversely with x and y = 6 when x = 3, then what is y when x = 2? a.) 9 b.) 12 -im guessing this? c.) 18 d.) 36
Friday, October 21, 2016 by megann

Math
A manufacturer of 24-hr variable timers, has a monthly fixed cost of \$56,000 and a production cost of \$9 for each timer manufactured. The units sell for \$16 each. Find the break-even point algebraically. a. break-even production 16,000 units; break-even revenue \$1,280,000 b. ...
Friday, October 21, 2016 by Kal Jay

The demand equation for a certain brand of GPS Navigator is x + 3p - 565 = 0, where x is the quantity demanded per week and p is the wholesale unit price in dollars. The supply equation is x - 16p + 480 = 0, where x is the quantity the supplier will make available in the ...
Friday, October 21, 2016 by Kal Jay

math
Suppose y varies directly with x and y = 72 when x = 6. What direct variation equation relates x and y? What is the value of y when x = 10?
Friday, October 21, 2016 by kyle

Math
Three-dimensional tic-tac-toe can be played on three arrays of 3x3 lattice points. To win, three points in a line must be chosen. Examples of such lines are ABC, ADE, AFG, AHI, FHJ. How many different lines can be found?
Friday, October 21, 2016 by Thomas

math
I'm really struggling with the concept of direct variation and indirect variation. Is there an easy way to explain it and understand it?
Friday, October 21, 2016 by Carly

math
State whether the lines are parallel, perpendicular, or neither. Show your work.x–5y=103 and –2x=–206–10y i got neither is that right
Friday, October 21, 2016 by allie

Math (Calculus)
Determine if each of the following functions is in Big-O, is Big-Omega and is Big-Theta of x: (Could be multiple) a) f(x)=10 b) f(x)=3x+7 C) f(x)=x^2+x+1 d) f(x)=5log(x) e) f(x)=|x| f) f(x)=x/2 I'm in calc 1 and I have no idea what's it even asking me. Help? Thanks in ...
Friday, October 21, 2016 by Ray

art
The math tessellations: unit 4 1. The architectural design was created by: 1. using an organic pattern in the form of tessellation. 2. using a geometric pattern in the form a tessellation. 3. using no definite pattern and placing shapes randomly. 4. using patterns that ...
Friday, October 21, 2016 by Justin

Math
Why do you have to use estimation to find the number of triangles you need for the string? I was wondering why this question is quite confusing and i was wondering if you can explain it to me in a way i can understand it. I'm not looking for an answer just a more simpler ...
Friday, October 21, 2016 by Jacob

Ashley is making cookies the recipe calls for 3/4 of a cup of sugar she needs to make 5 batches of cookies. How many cups of sugar does Ashley need? a. 3 cups b. 3 1/4 cups c. 3 1/2 cups d. 3 3/4 cups***** ***My work*** 3/4 * 5 = 3.75 .75= 3/4 3 3/4 AM I RIGHT?
Friday, October 21, 2016 by RL GRIME

Cost Volume Profit Analysis (Math)
Margin of safety - 20% Fixed costs - \$900,000 Contribution margin - 25% Break-even - 12,000 units Calculate actual total sales revenue. I have been trying this question out in many different ways however I still cannot solve it. Could someone show me the formulas and steps I ...
Friday, October 21, 2016 by Anonymous

Math
What is an estimate of the solution of the equation 6n+3=2? Use a table ok so I know the answer is -1/6 but its asking to use a table? does anyone know what kind of table you use for this and how I'd use it? thank you soo much
Friday, October 21, 2016 by Kylie

Math
which number is greater than 5.5 x 10^-7 and less then 5.5 x 10^7? a. 1.8 x 10^-12 b. 6.7 x 10^8 c. 5.2 x 10^3 d. 3.9 x 10^-8
Friday, October 21, 2016 by Josh

Math
9. A grocer wants to mix a type of spice which costs £22 per kilogram with another type which costs £12 per kilogram, to obtain 20 kilograms of mixture which will cost £15 per kilogram. What quantity of each spice must the grocer take?
Friday, October 21, 2016 by Alice

Math
What number has 7 tens and 3 less ones than tens?
Friday, October 21, 2016 by Anonymous

Math
suppose that unit price p in dollars for a quantity demanded X of a certain product of a company is given by p=-0.08+620 (0 <x <14,000). find the revenue function. Find marginal revenue function.
Friday, October 21, 2016 by Shala

Math
Please help!! This is a really weird question but I'm in a dilemma. My economics teacher doesn't post our marks online so idk what mark I'm actually at in his class. Can anyone help me figure out what percent I'm at right now if I give the following information...
Friday, October 21, 2016 by Maya

Math
Frank reads at least 24 pages but not more than 36 pages of a book. He reads 12 pages per hour. The number of hours Frank reads p pages is modeled by a function.   t(p)= p/12 1.) All real numbers from 2 to 3, inclusive. 2.) All real numbers. 3.) All real ...
Friday, October 21, 2016 by Jay

math
Which equation is set up correctly to determine the volume of a 3.2 mole sample of oxygen gas at 50°C and 101.325 kPa? V=(3.2 mol)(8.314 L⋅kPa/K⋅mol)(323 K)101.325 kPa V=(3.2 mol)(8.314 L⋅kPa/K⋅mol)(50∘C)1 atm V=(8.314 L⋅kPa/K⋅mol...
Friday, October 21, 2016 by anonymous

Math Help!
Help me please. Not sure how to solve this. Can someone show me how to do it step by step. -2/5x-9<9/10
Friday, October 21, 2016 by Amber

math
what is the answer to 1/3 * -1 1/5
Friday, October 21, 2016 by dude

Math
An automated production line uses distilled water at a rate of 300 gallons every 2 hours to make shampoo. After the line had run for 7 hours, planners noted that 2,500 gallons of distilled water remained in the storage tank. Write a linear equation relating the time in hours x...
Friday, October 21, 2016 by Anonymous

Math
TOXIC CLEANUP Three months after cleanup began at the dump site, 800 cubic yards of toxic waste had yet to be removed. Two months later, that number had been lowered to 720 cubic yards. a. Write an equation that mathematically describes the linear relationship between the ...
Friday, October 21, 2016 by Elena Davis

math
the 6th term of a gp is 2000 and it ratio is 10,find it first term
Friday, October 21, 2016 by Philip

math
A scuba diver dove from the surface of the ocean to an elevation of -79 9/10 feet at a rate of -18.8 feet per minute. After spending 12.75 minutes at that elevation, the diver ascended to an elevation of -28 9/10 feet. The total time for the dive so far was 19 1/8 minutes. ...
Friday, October 21, 2016 by tiffany

Math
The cost of renting a car from Rent-it Cheap for one day is \$29 plus 50 cents per km. For the same period, Thrift Cars charges \$37 plus 48 cents per km. When would it be more economical to rent a car from Thrift Cars? from Rent-it-cheap?
Thursday, October 20, 2016 by Saleeha

Math
Ok I am lost I need help. Describe how you can use a generic rectangle to multiply two numbers. Give an example. I'm just thinking of 22×35
Thursday, October 20, 2016 by Jessica

Math
9-2(b+3)=4b
Thursday, October 20, 2016 by Nasra

Math
Jonathan goes running every 2 days and he goes swimming every 5 days today he went and went swimming and how many days will he run and swim in the same day again
Thursday, October 20, 2016 by Antoine

Math
Please help!! This is a really weird question but I'm in a dilemma. My economics teacher doesn't post our marks online so idk what mark I'm actually at in his class. Can anyone help me figure out what percent I'm at right now if I give the following information...
Thursday, October 20, 2016 by Maya

Math
This is a Bennett diagram question. If 24 students take music, calculate the number of students who take music and drama and also calculate the number for drama only If 3x + x +7 + x
Thursday, October 20, 2016 by Chris

Math
The variables p and q have the same numerical value but the opposite sign; that is, one is positive and the other is negative. If -3*p + 4*q is positive, what can you say about p and q?
Thursday, October 20, 2016 by Mo

Math
What is the answer to use the rule to write the first 12 numbers in the pattern the square root of the pattern in the numbers first rule of 6 first term
Thursday, October 20, 2016 by Hannah Quarles