Questions on Algebra: Proportions answered by real tutors!

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Question 63615: graphing equations with two variables. y= -1/2x +3
Click here to see answer by checkley71(8403)

Question 64880: 18m/min=?cm/s
Click here to see answer by 303795(602)

Question 65099: i have no idea what im doing. its all so confusing. i need help.
Click here to see answer by funmath(2933)

Question 63164: THIS IS USING RATES...
Find a rate for each situation. then use the rate to answer the question.
A. kerstin drove 350 miles last week and used 12.5 gallons of gas. How many gallons of gas will he if he use drives 520 miles this week?
B. Angelo drove 225 miles last week and used 10.7 gallons of gas. how far can he drive this week using 9 gallons of gas?
Click here to see answer by 303795(602)

Question 65453: A van travels220 miles on 10 gallons of gas. how many gallons the van needs to travel 550 miles. I need help in writing and solving how.
Click here to see answer by stanbon(75887)

Question 65558: I have another word problem I understand but I don't understand....
The period of a simple pendulum is directly proportional to the square root of its length. If a pendulum has a length of 6 feet and a period of 2 seconds, to what length should it be shortened to achieve a period of 1 second?
I understand:
Pendulum directly proportional to square root of length
6 feet with a period of 2 seconds
I am trying to find the length to be shortened to make a period of 1 second.
I know I might be nuking this....
Click here to see answer by stanbon(75887)

Question 25975: 4 pencils and 2 pens cost $1.08 6 pencils and 5 pens cost $2.22 find the cost of each pen and pencil

Click here to see answer by tran3209(100)

Question 19935: a fly wheel has 72 teeth and a starter drivegear has 15 teeth. Find the ratio of fly wheel teeth to drive gear teeth.
Click here to see answer by tran3209(100)

Question 65892: The distance required for a car to stop is directly proportiional to the square of its velocity. If a car can stop in 112.5 meters at 15 kilometers per hour, how many meters are needed to stop at 25 kilometers per hour?
Answer Choices:
A 250.75
B 298.00
C 312.50
D 337.50
Click here to see answer by Nate(3500)

Question 65897: The distance required for a car to stop is directly proportional to the square of its velocity. If a car can stop in 112.5 meters at 15 kilometers per hour, how many meters are needed to stop at 25 kilometers per hour?
Answer Choices:
A) 250.75
B) 298.00
C) 312.50
D) 337.50
Click here to see answer by checkley71(8403)

Question 66217: The scale of a map reads 1:250000. Find the distance, in km, between 2 towns which are 3.5cm apart on the map.
Click here to see answer by josmiceli(19441)

Question 66255: Please help me find the measures of the sides of the triangle: The ratio of the measures of three sides of a triangle are 1/2:1/3:1/5, and its perimeter is 6.2 centimeters.
Click here to see answer by checkley71(8403)

Question 66253: Can you please help me with this proportion? The ratio of the measures of three angles of a triangle is 5:7:8. Find the measure of each angle of the triangle.
Click here to see answer by checkley71(8403)

Question 66261: If a:b=3:4 and a:(b+c)=2:5.find the value of a:c?
Click here to see answer by stanbon(75887)

Question 66251: Please help me solve this proportion: The ratio of the measures of three sides of a triangle is 9:8:7, and its perimeter is 144 units. Find the measure of each side of the triangle.
Click here to see answer by Nate(3500)

Question 66383: plz help me with this plz? iv been up all night trying to figure it out. its 26cm/s=?m/min. plz help
Click here to see answer by ptaylor(2198)

Question 66512: A,B,C,D are 4 points on a line such that AB:AC=3:5 and BD:CD=7:2. If CD is
5cm long, find the length of AB?
Click here to see answer by checkley71(8403)

Question 66549: Use cross products to determine whether each of pair of ratios forms a proportion:
4/9, 12/27
Please explain how to solve this problem.
Click here to see answer by stanbon(75887)

Question 66610: a scale drawing of a basketball court has a scale of 1 inch : 9 feet. the basketball court is 94 feet by 50 feet. find the dimensions of the court in the drawing.
Click here to see answer by Nate(3500)

Question 66709: the shadow of a tree is 10 meters long, the shadow a meter stick is .4 meters long. how tall is the tree? 25 meters?
do you multiply .4 meters by 10 meters? Or do you convert to feet and divide?
Click here to see answer by Earlsdon(6294)

Question 66758: FIND EACH UNIT RATE.
$57 for 6 hours
Click here to see answer by rapaljer(4671)

Question 66975: I dont really know if this is about proportions, but can you please help me solve problems like this? 3hrs/min=56sec/m I really need to know early, because we have mid terms tomorrow. Can you please help?
Thank You
Click here to see answer by checkley71(8403)

Question 67027: The tram could cover 400 centimeters in 50 seconds. If the rate of the tram were reduced by one half during the thunderstorm, how far could the tram go in 20,00 seconds?
Click here to see answer by stanbon(75887)

Question 67201: Two cities on a map are 5.5 inches apart. The cities are actually 198 milles apart. What was the scale used to draw the map?
Click here to see answer by 303795(602)

Question 67476: please help me solve these question 120% of y is 42
Click here to see answer by stanbon(75887)

Question 67470: write as a percent 5/8 then 7/16 and 5/4
Click here to see answer by checkley71(8403)

Question 67549: the length of two pieces of wire are in the ratio 4:7.if the lenght of the longer piece is 3.5m, what is the length of the shorter piece?
Click here to see answer by ptaylor(2198)

Question 67903: Looking for help on solving proportion problem (6th grade math) 1.2/9 = c/1.5 . How do you solve this when you have mixed number? Another example we WERE able to solve is 3/4 = 12/b by cross cancelling (i.e., 4x12=3xb, 48=3b, 48/3=3b/3, 16=b. We just cannot figure out how to do this with a numerator that is a decimal???
thank you so much for any assistance you can give.
Click here to see answer by funmath(2933)

Question 68051: How do I:
"Write a proportion and solve"
--What percent of 80 is 42?
I came up with 52.5% I wrote this down
The teacher circled "write a proportion," and marked it wrong.
I did not show my work.
Sammy
Click here to see answer by stanbon(75887)

Question 68034: If I know that a + b + c = 100 and I also know that .5a + 3b + 10c = 100 how do I find the values of a, b and c?
Thanks
Click here to see answer by ankor@dixie-net.com(22740)

Question 68066: a - 3 3
------ = -
8 4
Click here to see answer by checkley71(8403)

Question 68280: Here is a question:
At an Italian restaurant there is a jug of heterogeneous oils that are composed of 20 liters of 93% oil type and 10 liters of pure neutral liquid.
Now, the 93% oils are on the bottom while the neutral liquid is less dense. How much of the oils must I take out of the bottom, so that when I shake the jug up, I get a heterogeneous solution of 64%?
Click here to see answer by Nate(3500)

Question 68313: The area of a rectangle is 216ft.2 (squared) The length of the rectangle is 18 ft. If a scale drawing of the figure has a scale of 1/2in. = 6 ft. What are the dimensions of the rectangle on the scale drwaing.
Click here to see answer by ptaylor(2198)

Question 68453: The revenue for a sandwich shop is directly proportional to its advertising budget. When the owner spent $2000 a month on advertising, the revenue was $120,000. If the revenue is now $180,000, how much is the owner spending on advertising?
Click here to see answer by funmath(2933)

Question 68452: m varies directly with n; m = 144 when n = 8.
Click here to see answer by funmath(2933)

Question 68556: In printing an article of 48,000 words, a printer decides to use two sizes of type. Using the larger type, a printed page contains 1,800 words. Using smaller type, a page contains 2,400 words. The article is allotted 21 full pages in a magazine. How many pages must be in smaller type?
Click here to see answer by rmromero(383)

Question 68714: The aspect ratio of a TV screen is the ratio of its length to its width. The aspect ratio of a standard TV screen is 4:3. The aspect ratio of a wide screen TV in United States is 16:9. Describe how you would tell whether a TV has a standard or wide screen given the length and width of the screen.
Click here to see answer by checkley71(8403)

Question 68791:
Click here to see answer by rmromero(383)

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