Questions on Algebra: Proportions answered by real tutors!

Tutors Answer Your Questions about Proportions (FREE)

Question 104842: x+3 over 4 is = to 7 over 8
Click here to see answer by doukungfoo(195)

Question 102826: How do you solve this problem using the FOIL method backwards?
Click here to see answer by HyperBrain(694)

Question 105134: One number is twice another number. The sum of the two numbers is 39. Find both numbers
Click here to see answer by MathLover1(6632)

Question 97511: boxes/min = 8/20 min = x/60 mins
Click here to see answer by HyperBrain(694)

Question 105692: Sid weighs 65lb. The seesaw balances when sid sits on the seat 4 ft from the center and emily sits on the board 2 1/2 ft from the centet. About how much does emily weigh?
Click here to see answer by checkley75(3666)

Question 106102: Complementary angles are two angles whose measures add to 90 degrees. The ratio of the measures of two complementary angles is 4:11. What are the measures of the angles?
Click here to see answer by Fombitz(13828)

Question 106100: A right triangle has legs 15 inches and 12 inches. Every dimension is multiplied by 1/3 to form a new right triangle with legs 5 inches and 4 inches. How is the ratio of the areas related to the ratio of corresponding sides?
Click here to see answer by ankor@dixie-net.com(15652)

Question 106327: 18/48 = 12/n

Click here to see answer by luckyg25(2)

Question 106389: A wooden model galleon is built using a 1:90 scale. The length of the model is 520 millimeters and the height is 615 millimeters. Solve the proportions to find the actual length and height of the galleon.
Click here to see answer by solver91311(16885)

Question 105016: x over 45 = 70 over 30
Click here to see answer by HyperBrain(694)

Question 97510: international students/us students = 2/35 = x/1575
Click here to see answer by HyperBrain(694)

Question 107564: Thank you in advance tutor,I would like to ask you this proportion question
Given that y varies inversely as the reciprocal of and y= 3 when x=2
Find the equation relating x and y
Click here to see answer by stanbon(57347)

Question 107972: find a number which decreased by 24 equals 3 times its opposites.
Click here to see answer by ankor@dixie-net.com(15652)

Question 108156: The velocity ( v meters per second ) of a body is known to be proportional to the sqaure root of it's kinetic energy ( e ejoules). When the velocity of a body is 120m/s it's kinetic energy is 1600J.
Write down the relationship between v , e using k as the constant of varation.
Calculate the value of k
v = 21 , calculate the kenetic energy of the body in joules.

Can someone explain me please the right method in solving each quesion with the steps.

Click here to see answer by edjones(7569)

Question 108207: solve each proportion.
Click here to see answer by elima(1433)

Question 108645: what number is 120% of 80?
how do i do this?
Click here to see answer by stanbon(57347)

Question 108645: what number is 120% of 80?
how do i do this?
Click here to see answer by checkley71(8403)

Question 108715: A certain preparation consists of liquids x, y, and z in the proportion 5:2:1. How many gallons of the preparation can be made from a stock of materials consisting of 25 gallons of x, 20 gallons of y, and 8 gallons of z?
Click here to see answer by stanbon(57347)

Question 108916: Please help me . This is due tomorrow so I would really apriciate to get the answer ASAP.
A watch, set accurately at noon,at 5p.m indicates 10min. to 5.How many minutes past 5 is it actualyy when the watch indicates 5p.m.. Express your answer as a mixed number.
Click here to see answer by josmiceli(9678)

Question 109010: Jose rode a trail bike for 10 miles. 2/3 of the distance was over a mountain trail. How long is the mountain trail.
I cannot quite figure this out I know 2/3 = 4/6 which is 0.66666 but cannot figure out the distance part. I appreciate any help on this please.
Thank You,
Barb Neely
Click here to see answer by ankor@dixie-net.com(15652)

Question 109042: If 8 people do a piece of work in 12 days, how many people will be needed to do the same work in 16 days?
Click here to see answer by scott8148(6628)

Question 109270: Solve for x: 7/21 = x/24
Click here to see answer by stanbon(57347)

Question 109632: Please help, I am given the following question, but I do not get the answer that is given. Their answer is 154, therefore would you please be able to give me the correct steps to get their answer, or please let me know if they have made a mistake.
If A varies directly as 1/B, and given that A = 117 when B = 83.4, evaluate:
B when A = 63.2.
Thank you so very much. Cheers D

Click here to see answer by Fombitz(13828)

Question 109936: If a a paint mixture uses 60 pounds of solvent for 75 gallons of paint, how many pounds of solvent are needed for 90 gallons of paint?
Click here to see answer by checkley71(8403)

Question 109956: Hi everyone.
I am stuck on another problem which I have been working on since yesterday morning, and although I have the answer from the text. I have absolutely no idea how they have came about it, any assistance would be greatly appreciated. Cheers D
The question is as follows:-
The frequency of revolution, n (i.e. the number of orbits per unit of time), of a satellite above the earth varies inversely as sqrt r^3, where r is the radius of orbit. Given that a satellite whose radius of orbit is 5080 km orbits the earth each hour, find:
The radius of orbit for a satellite that orbits the earth once per day (correct to the nearest 100 km)
It gives me an answer of 42,300 km. This is however how I have gone about trying to solve this problem: ((sqrt5080^3)*(1/24))/(24/1)= 628.598. I have tried various different combinations but am still struggling to get the correct answer.
Again your help and assistance would be greatly appreciated. Thank you. Cheers D
Click here to see answer by bucky(2189)

Question 110003: I don't get how to write a proportion. For example, 15 is 25% of what? I don't get how to put it into a proportion.
Click here to see answer by HyperBrain(694)

Question 110250: The school board estimates that there will be a 2.5% increase in enrollment for next year. If the present enrollment is 8,657 what is the estimated enrollment?
Click here to see answer by stanbon(57347)

Question 110308: The school board estimates that there will be a 2.5% increase in enrollment for next year. If the present enrollment is 8,657, what is the estimated enrollment?
Click here to see answer by wgunther(43)

Question 110622: 5+y= 14
--- --
y-3 10
Click here to see answer by solver91311(16885)

Question 110968: On Sunday, 845 people went to the zoo. On Tuesday, 169 people went. What is the percent of decrease from Sunday to Tuesday?

Click here to see answer by stanbon(57347)

Question 110969: A building is casting a 100 ft. shadow at the same time that a 5 ft. post is casting a 1 ft. shadow.
Write a proportion that involves the height of the building, the height of the post, and legnths of the shadows.
How high is the building?

Click here to see answer by scott8148(6628)

Question 111010: on some days, a bakery packages cupcakes 4 to a box. On other days, they package cupcakes 6 or 8 to a box. On a given day, all of the cupcakes baked were packaged and there was one cupcake left over. Which of the following could not be the number of cupcakes baked on that day?
Click here to see answer by stanbon(57347)

Question 111359: Carney college is expanding from 850 to 1050 students. To avoid any rise in the student to faculty ratio, the faculty of 69 professors must also iincrease. How many new faculty positions should be created?
Click here to see answer by edjones(7569)

Question 111697: AN ADMINISTRATOR OF A POPULAR WEB SITE IS TOLD THAT A NEW SERVER CAN HANDLE 11,000 HITS (USERS ACCESSING THE SITE) PER SECOND. THE WEB SITE CURRENTLY EXPERIENCES A PEAK DEMAND OF ABOUT 85,000 HITS PER SECOND; BUT EVERY MONTH THE PEAK DEMAND INCREASES BY 3500 HITS PER SECOND. USE A PROPORTION EQUATION TO DETERMINE HOW MANY NEW SERVERS THE ADMINISTRATOR SHOULD BUY TO ADDRESS EXPECTED TRAFFIC FOR THE NEXT 18 MONTHS.
Click here to see answer by stanbon(57347)

Question 111696: A NEW VIRUS IS RELEASED ON THE INTERNET; THE ADMINISTRATOR OF A DEPARTMENTS LOCAL ARE NETWORK (LAN) IS GIVEN FIVE MINUTES BY A MANAGER TO ESTIMATE THE IMPACT. THE ADMINISTRATOR SAMPLES 12 OF THE PCs CONNECTED TO THE LAN, AND FINDS THAT 7 ARE INFECTED; USE PROPORTION TO ESTIMATE THE NUMBER OF INFECTED PCs IF THERE ARE A TOTAL OF 117 PCs CONNECTED TO THE LAN.
Click here to see answer by stanbon(57347)

Question 111695: A LAWYER BILLS HER CLIENT $250 PER HOUR OF SERVICE. IF A CLIENTS CASE REQUIRES 47 HOURS TO COMPLETE, USE PROPORTION TO CALCULATE HOW MUCH THE CLIENT WILL OWE THE LAWYER(INCLUDE TAX).
Click here to see answer by BrittanyM(80)

Question 111848: Evaluate f/4 if f=1/5.
Click here to see answer by jim_thompson5910(28595)

Question 113462: I know the answer, which is 97, because I found it in the back of the book, but I can't figure out how to solve the problem and I need to show work. Please help me with the steps. The question is:
Verna decided to sell her collection of paperback books. To Fred, she sold 2 books, and one fifth of what was left. Later to Joan she sold 6 books, and one fifth of what then remained. If she sold more books to Fred than to Joan what was the least possible number of books in her original collection?
Click here to see answer by edjones(7569)

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