Questions on Algebra: Proportions answered by real tutors!

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Question 135475: x-3/x=4/7
Click here to see answer by checkley77(12569)

Question 135634: w is directly proportional to z. If w = -6 when z =2,find w when z =-3
Click here to see answer by solver91311(16868)

Question 135635: m varies jointly with the square of n and the square root of q.
m = k*n^2*sqrtq
-------------------
If m = 24 when n =2 and q =4,
find m when n = 5 and q = 9

If m = 24 when n =2 and q =4, find m when n = 5 and q = 9
Click here to see answer by stanbon(57216)

Question 135585: A study is being done on the catfish population of a lake. An enviromental worker catches, tags, and frees 96 catfish. One month later, he catches and frees 116 catfish and 29 have tags. Which proportion should be used to estimate the total number of catfish, x, in the lake?
Click here to see answer by checkley77(12569)

Question 135636: Hooke's law
The force (f) required to stretch a spring a distance(d) is directly proportional to(d). A force of 5 newtons stretches a spring 0.2 meter.what force will stretch the spring 0.35 meter?
Click here to see answer by vleith(2825)

Question 136479: a map has a scale of 4 cm to 7km. which proprotion would not allow you to find the actual distance beween two cities if they are 10 cm apart on the map?
a. 4/10 = 7/x
b. 7/4 = x/10
c. 4/7 = 10/x
d. 4/10 = x/7
Click here to see answer by checkley77(12569)

Question 137205: A woman started with a full rank of gas in her car. On Saturday she used 2/5 of the tank. On Sunday she used 3/4 of what was left in the tank. What part of the full tank was left after the weekend?
Could you please help me, thanks.
Click here to see answer by vleith(2825)

Question 137241: please help me find a solution to this proportion. I cant get it factored.
2x^+9x-5
--------
4x^-4x+1
All that i can come to is (2x___)(1x___)
= --------------
(2x___)(2x___)

please help me it would be much appreciated.Thanks
Dustim Martin.

Click here to see answer by Earlsdon(6287)

Question 137396: Mark's soccer team played 12 games. The ratio of games won to games lost was 2:1. To the nearest whole percent, what percent of the games did his team lose?
Click here to see answer by edjones(7569)

Question 137436: Mark's soccer team played 12 games. The ratio of games won to games lost was 2:1. To the nearest whole percent, what percent of the games did his team lose?
Click here to see answer by stanbon(57216)

Question 137413: Mark's soccer team played 12 games. The ratio of games wont to games lost was 2:1. To the nearest whole percent, what percent of the games did his team lose?
Click here to see answer by checkley77(12569)

Question 138207: You serve a tennis ball from one end of a tennis court, 39 ft from the net. You hit the ball at 9 feet above the ground. It travels in a straight path down the middle of the court, and just clears the top of the 3-ft net. How far from the net does the ball land?
WORK:
he is 39ft from the net, the net is 3ft high, the ball is hit 9 ft above the ground
Click here to see answer by stanbon(57216)

Question 138206: The height of the Eiffel Tower is 984 ft. A souvenir model of the tower is 6 in. tall. At 5 P.M. in Paris, the shadow of the souvenir model is 8 in. long. The Eiffel Tower and its shadow determine two legs of a right triangle that are similar to the two legs of a right triangle determined by the souvenir model and its shadow. About how long is the shadow of the Eiffel Tower?
Click here to see answer by stanbon(57216)

Question 138236: i need help with this problem:
n-3 n-4
---=---
n+5 n+3
Click here to see answer by checkley77(12569)

Question 138216: 2. Determine the next three terms that fit the pattern:
3, 7, 17, 27, 44, 71.......115,186,301
Click here to see answer by checkley77(12569)

Question 138303: Seventy eight is divided into two parts such that five times the first part and fourtimes the second part are in the ratio 15:14.Find the first part
a)32 b)36 c)42 d)46

Click here to see answer by vleith(2825)

Question 138311: 100 nautical miles equals about 115 statute miles. About how far in nautical miles is 50 statute miles? Round to the nearest whole number
Click here to see answer by checkley77(12569)

Question 138336: The average age of three boys is 25 years and their ages are in the proportion 3:5:7.The age of the youngest boy is
a)21 b)18 c)15 d)9

Click here to see answer by checkley77(12569)

Question 138543: Problem-Solving Strategy: Make A Table
Paul wants to buy a stereo system. The store allows a 15% discount if the purchase is paid for within 30 days. A 20% discount is given if the purchase is paid for within 10 days. If Paul pays $400 at the time of purchase, what was the original price of the stereo system?
Click here to see answer by vleith(2825)

Question 139535: Maria is standing beside a 15-foot flagpole. She is 4.5 feet tall and casts a 7.5-foot shadow. What is the length of the flagpole's shadow?
Click here to see answer by MathLover1(6613)

Question 139534: Jacob's shadow is 150% of his height. He is 5 feet tall. His older brother casts a 9-foot shadow. How tall is Jacob's older brother?
Click here to see answer by checkley75(3666)

Question 139790: How do you find proportion
example
Which of these is the correct proportion
72:24=8:3 WRONG
36:48=2:3 WRONG
2:5= 30:75 CORRECT
9:7= 81:54 WRONG
Click here to see answer by checkley75(3666)

Question 139970: A is directly proportional to B. When A is 7, B is 2. What is B when A is 10?
P is inversely proportional to Q. P is 5 when Q is (1/10). What is P when Q is 0.01?
I am confused? Do you set this up as a cross multiplication? Please help. Thankyou Bill
Click here to see answer by stanbon(57216)

Question 140093: Which pair of ratios does not form a proportion?
A. 4/10, 18/45
B. 26/2,52/4
C.-2/5, -8/25
D. -4/7, -20/35
Answ. -4/7, -20/35 Right????
Click here to see answer by checkley77(12569)

Question 140433: I have a pie chart. divided into 4 sections.
1/4 says A(20%)
1/4 says B (25%)
1/4 says C
1/4 says D
The ratio of C's to D's is 7:4
There are more B's than A's.
How many C's are there?
I am confused... Maria
Click here to see answer by stanbon(57216)

Question 140436: A jar has twice as many red marbles as white marbles and the ratio of blue marbles to white marbles in the jar is 3:5. There are only red, white and blue marbles in the jar. If there are 2100 more red marbles than blue ones, how many marbles are in the jar altogether?
so far I came up with 6600 white, 11000 blue and 13200 red but that gives me 2200 more red and I need 2100. I just cant think anymore.. Am I close? Maria
Click here to see answer by scott8148(6628)

Question 139548: Jacob's shadow is 150% of his height. He is 5 feet tall. His older brother casts a 9-foot shadow. How tall is jacob's older brother

help me please!!! help!
Click here to see answer by smarty1994(10)

Question 140793: I have to find the value of "x" and the 2nd "x" on the base of the triangle is throwing me. is it REALLY x/x+6= 2/6 on the proportions? then what??? (in case you don't have the book, Proportional Triangles, drawn as one. The smaller is 6" on the base and 2" high. No hypotinuse(sp) The larger has a side and base of "x" It the base had a measurement instead of the "x" I think I could solve it. Book says x=3. Can't figure out how.
Click here to see answer by Edwin McCravy(8879)

Question 141442: I am a GED student at Jefferson college and I am getting ready to take my test. I really need to know how to do ratio. For example:
There are 5 red baloons, 3 green baloons, 2 yellow baloons and only one pink baloon. What are the odds that richard picks a red baloon first?

I am pretty sure that this is a ratio question. I have school tommarrow and only a computer today. So please email me back asap. I take the hardest math test tommorrow that determins my ablilty to pass the main GED test.

Click here to see answer by checkley77(12569)

Question 141970: x/5 = 9/10 - 1/x
Click here to see answer by checkley77(12569)

Question 142347: James is one and a half times taller than his sister Jill. Together their heigh is 10 ft 5 ins . What are their individual heights?
Click here to see answer by stanbon(57216)

Question 142400: please answer- what percent of 5 is 4 - thank you
please answer- 30% percent of what number is 6 - thank you
please answer- 87.5 percent of what number is 4 - thank you
please answer- dinner for two freinds costs $24.32. the pair wants to leave a 15% tip. how much should they leave for a tip? - thank you
Click here to see answer by checkley77(12569)

Question 142487: Complete
Round 78,669.64984 to the nearest ten-thousandth.
Click here to see answer by benni1013(197)

Question 142535: I am faced with what I believe to be an open-ended assessment question related to proportions and ratios. The question is as follows:
Tony and Ivia started walking south from the same location at the same time. Ivia walked 8 miles and walked 1 mile per hour faster than Tony who walked 6 miles. They each walked for the same amount of time.

a. I need to describe how a proportion could be used to find the rate that each person walked at.

b. The next day they both walked 6 miles, and Ivia again walked 1 mile per hour faster than Tony, who walked 3 miles per hour. Determine whether a proportion could be used to find how long each person walked
Click here to see answer by ankor@dixie-net.com(15623)

Question 142834: i need help with 2t=10(t-1)
Click here to see answer by oscargut(891)

Question 143055: Find two real numbers that have a sum of 8 and a product of 2.
Click here to see answer by checkley77(12569)

Question 143442: Y varies directly with respect to x. When x= -5, and y=20 what is y when x=18?
Click here to see answer by edjones(7569)

Question 143905: 9x squared = 1
the directions said simplify
Click here to see answer by stanbon(57216)

Question 143904: 3x squared - 41x = -60
the directions said simplify
Click here to see answer by jim_thompson5910(28476)

Question 143913: Approximately 5 out of every 10 students at Kendra's college live on campus. The college has 5,000 students. How many of them live on campus?
Click here to see answer by jojo14344(1512)

Question 143929: Talon reads 1,000 words in 5 minutes, and Samantha reads 650 words in 2 minutes. Who is the faster reader?
Click here to see answer by ptaylor(2048)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970