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Question 134562: I have been working on this math problem and I got an answer, but I am not sure if I did it right!! I was wondering if anyone could help me? I would deeply appreciate it!! Please and Thank You!
This is the work that I did
It takes a plane 40min to fly from Boston to Los Angeles at 525mi/h than it does to return at 600mi/h. How far apart are the cities?
My Chart
r * t =d
trip 525 * t+.6 = 525(t+.6) 40/60=.6
return 600 * t = 600t
t=time in hours
600t=525(t+.6)
600t=525t + 315
-525t -525t
75t=315
divide by 75t and t=4.2
I don't know if this answer is right, but I hope someone could help me.
Click here to see answer by ankor@dixie-net.com(22740)

Question 134600: I have been working on this math problem and I got an answer, but I am not sure if it is right!! I was wondering if someone could help me? I would deeply appreciate it!! Please and Thank you!!
Rate-Time-Distance Problems
Solve.
Jan can run at 7.5m/s and Mary at 8.0m/s. On a race track Jan is given a 25m head start, and the race ends in a tie. How long is the track?
My chart
r * t =d
Jan 7.5 t =7.5t+25
Mary 8.0 t =8.0t
7.5t+25=8.0t
-7.5t -7.5t
25=.5t
divide by .5 and I got 50 then I times that by 8.0 and got 400miles
I don't know if I am right, but I hope someone could help me!!
Click here to see answer by stanbon(75887)

Question 134622: I am sorry for asking so many math problems, but I was wondering if someone could please help me? I would deeply appreciate it!! Please and Thank You!!
Rate-Time-Distance Problems
solve.
An ultralight plane had been flying for 40 minutes when a change of wind direction doubled its ground speed. The entire trip of 160 miles took 2 hours. How far did the plane travel during the first 40 minutes?
I deeply appreciate all the help that the tutors have given me!!
Click here to see answer by vleith(2983)

Question 134620: An inlet pipe can fill a tank in 6 minutes. A drain can empty the tank in 8 minutes. If the tank is empty and both the pipe and drain are open, how long will it take before the tank over flows?
Click here to see answer by solver91311(24713)

Question 134657: One angle of a triangle has a measure of 80 degree and the measures of the outer two angles are in a ratio of 2 to 3.Find the measures of the other two angles. Please show how you get the answer, thank you in advance.
Click here to see answer by stanbon(75887)

Question 134729: A grocer bought some boxes of apples for $70. However, 4 boxes were spoiled. The grocer sold the remaining boxes at a profit of $2. How many boxes did the grocer sell if she managed to break even?
Click here to see answer by ankor@dixie-net.com(22740)

Question 134746: The concentration of a drug in medical patients bloodstream is given by
f(t)=5 / where t is greater than less than 0 is in hours and f(t) is in milligrams per liter.
a. Does the concentration of the drug increase or decrease? Justify answer
b. The patient should not take a second dose until the concentration is below 1.5 milligrams per liter. How long should the patient wait before taking a second dose?
Click here to see answer by stanbon(75887)

Question 134769: The perimeter of a rectangular garden is 98 feet. The length of the garden is 4 feet more than twice the width. What is the length of the garden?
Click here to see answer by cbcrawford978(7)

Question 134781: I have been working on this math problem for awhile now and I was wondering if anyone could help me? I would deeply appreciate it!! Please and Thank you!!

Area Problems
solve.
A corner lot originally was square lost 185m^2 of area when one of the adjacent streets was widened by 3m and the other was widened by 5m. Find the new dimensions of the lot.
Click here to see answer by ankor@dixie-net.com(22740)

Question 134784: Micha plans to raise money for her Mortar Board chapter by selling Blossom Express Flowers, which gives 20% of sales to the chapter. If her goal is to raise $1500, how much must she reasonably sell in flowers?
A $5000
B $7500
C $10000
D $12500
Click here to see answer by vleith(2983)

Question 134918: I have been given this problem for extra credit could someone please help with the solution.

There are 100 open lockers. There are 100 students.

(Note definition- Status change: If a locker is closed it becomes open or if the locker is open it becomes closed).

The first student changes the status of all the lockers (Student closes 100 lockers).
The second student changes the status of every two lockers (lockers 2,4,6,8...100 are opened).
The third studen changes the status to every third locker (the status of lockers 3,6,9,12....99 are changed).
This process is repeated until all 100 students have had their turn at changing the status of their locker(s).
Question: What lockers are left closed?

Click here to see answer by solver91311(24713)

Question 134886: A company makes three types of backpacks for a cost of $754 for 100 backpacks. Production costs for the three types are $5, $8, and $12. They sell for $20, $30, and $50 respectively. How many of each type are made if the profit is $2226?
Click here to see answer by ankor@dixie-net.com(22740)

Question 134951: I have been struggling on this math problem for awhile now and I was wondering if anyone could help me? I would deeply appreciate it!! Please and Thank you!!
Area Problems
solve.
A small city park consists of a rectangular lawn surrounded on all sides by a 330m^2 border of flowers 2.5m wide. find the area of the lawn if the entire park is 5m longer than it is wide.
Click here to see answer by stanbon(75887)

Question 134955: Shomika was helping her family pick oranges in their grove. She took some oranges home to share with her three friends. She gave 3 more than half to Jennifer. Angela got half of the remainder and 3 more. She gave Josie half of the remainder plus 3. When she got home, she only had 10 oranges left. How many did she have when she left the grove?
Click here to see answer by stanbon(75887)

Question 134938: I have been struggling on this math problem for awhile now and I was wondering if anyone could help me? It has a picture with it, so I am going to describe the picture as best as I can!! I would deeply appreciate it!! Please and Thank you!!
Area Problems
solve.
The area of a circle of a radius r is given by the formula a=pier^2. Use this fact to find a formula for the shaded area in the figure below.
The figure is a big circle with a small circle in side of it. The radius is inside the small circle. The width is in the big circle. radius=r and width=w
The shaded region is the big circle.
I don't know if this helps at all, but I am hoping someone could help me!!
Click here to see answer by rajagopalan(174)

Question 135054: My question is: If 2 cats can catch 2 mice in 2 days, how many mice can 20 cats catch in 10 days?
Thanks for your help.
Click here to see answer by vleith(2983)

Question 135060: The value in the table are generated by a rule of the form a = bc + d where b and d are constant. Find a when c = 19.
c --->1 2 3 . . .19
a ---> 8 11 14 . . .
Any help you can provide would be great. Thanks.
Click here to see answer by vleith(2983)

Question 135034: I would appreciate your help with this problem thank you.
On three consecutive passes, a football team gains 5 yards, loses 29 yards, and gains 46 yards. What number represents the total net yardage?
Click here to see answer by checkley77(12844)

Question 135070: If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20 drinks?
Click here to see answer by solver91311(24713)

Question 135094: An arrow is shot vertically upward with an initial velocity of 250 feet per second from an initial height of 10 feet. The height of the arrow as a function of the time t in seconds, is given by the function s(t)=-16t^2+150t+10. Solve each of the following analytically.
a. what is the height of the arrow after 2 seconds
b. What is the maximum height reached by the arrow
c. After how many seconds will the arrow return to the ground
Click here to see answer by solver91311(24713)

Question 135145: solve :

1) The sum of the page numbers on facing pages of a book is 157; what are the page numbers?
2) A girl buys three apples and seven oranges for $4.56. If an orange costs $0.28 more than an apple, how much does each fruit cost?
3) A woman buys three pairs of jeans for $99.84, including tax. If each pair of jeans cost $32, what was the sales tax rate?

Click here to see answer by checkley77(12844)

Question 135046: you are deciding between two cars with different engines and want the bigger of the two. One engine displaces 350 cubic inches. The other displaces 5,500 cubic centimeters. By how many cubic centimeters is the bigger engine larger than the smaller one?
Click here to see answer by ankor@dixie-net.com(22740)

Question 135187: Translate into equoation plz :
1) Tom’s uncle owns a triangular piece of land. The perimeter fence that surrounds the land measures 378 yards. The shortest side is 30 yards longer than one-half of the longest side. The second longest side is 2 yards shorter than the longest side. What is the length of each side?
Click here to see answer by scott8148(6628)

Question 135188: Translate into equoation plz :
1) Tom’s uncle owns a triangular piece of land. The perimeter fence that surrounds the land measures 378 yards. The shortest side is 30 yards longer than one-half of the longest side. The second longest side is 2 yards shorter than the longest side. What is the length of each side?
Click here to see answer by scott8148(6628)

Question 135355: If the complement of an angle is 5 degree less than one-sixth of its supplement, find the measure of the angle.
Click here to see answer by stanbon(75887)

Question 135354: One of two supplementary angles is 4 degree more than one-third of the other angle. find the measure of each angle.
Click here to see answer by checkley77(12844)

Question 135353:
Annilee's present age is two-thirds of Jessie's present age. In 12 years the sum of their ages will be 54 years. Find their present ages.
Click here to see answer by checkley77(12844)

Question 135352: A board 20 feet long is cut into two pieces such that the lenght of one piece is two-thirds of the lenght of the other piece. find the lenght of the shorter piece of board.
Click here to see answer by checkley77(12844)

Question 135351: Suppose the width of a certain rectangle is 1 inch more than one-fourth of its lenght. the perimeter of the rectangle is 42 inches. find the lenght and width of the rectangle.
Click here to see answer by checkley77(12844)

Question 135348: You get home and you forgot to wind the clock so you set it at 4:00. You arrive at a friends house and he say's it's 7:00. You stay until 9:00. You get home and the clock reads 7:00. Set the correct time. The time it takes to get from your house to your friends is equal.
Click here to see answer by ankor@dixie-net.com(22740)

Question 135372: i need a little help with this word problem:
The reciprocal of two more than a number is three-fourths of the reciprocal of the number itself. what is the number?
Click here to see answer by stanbon(75887)

Question 135378: sarah has a collection of nickles, dimes, and quarters worth $15.75. she has 10 more dimes than nickles and twice as many quarters as dimes. How many coins of each does she have?
Click here to see answer by stanbon(75887)

Question 135367: Ozark furniture Company can obtain at 3000 board feet of maple lumber for making its classic and modern maple rocking chairs A classic maple rocker requires 15 board feet of maple, and a modern rocker requires 12 board feet of maple. Write an inequality that limits the possible number of maple rockers of each type that can be made, and graph the inequality in the first quadrant.
Click here to see answer by stanbon(75887)

Question 135391: The perimeter of a rectangular field is 140 yards. The land sells for $10/yd^2 and the total cost o the land is $12,000. What are the dimensions of the field?
Click here to see answer by stanbon(75887)

Question 135381: Eva invested a certain amount of money at 10% interest and $15oo more tahn that amount at 11%. Her total yearly interest was $795. How much did she invest at each rate?
Click here to see answer by stanbon(75887)

Question 135399: The entrance to a tent is the shape of an equilateral triangle. If the base of the tent is 18 feet wide, then how tall is the tent?
Click here to see answer by stanbon(75887)

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