Questions on Algebra: Proportions answered by real tutors!

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Question 68792:
Click here to see answer by rmromero(383)

Question 69079: 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 bucky(2189)

Question 69481: Find the constant variation of K.
m varies directly with n; m=144 when n=8.
Totally lost!
Click here to see answer by funmath(2933)

Question 20976: 12(m^2-8)=3m(4m+1)
please help
Click here to see answer by terbear1963(43)

Question 69917: 236.7 miles in 4.5 days
how many days for 1 mile?
331.5 pages in 8.5 weeks
how many weeks for 1 page?
Click here to see answer by checkley75(3666)

Question 70539: I am not sure how to set up a proportion to solve this.
It says heavier people burn more calories for the same activity and lighter people burn fewer. In fact, you can calculate similar figures for burning calories by setting up the appropriate proportion. Biking burns 410 c/h based on a 150-pound person.
At what rate would a 120-pound person burn calories while biking at 12 mi/h?
Do I use x calories/120 lb person = 12 miles/hour? I understand the basics of proportions and cross multiplying, then dividing by the coefficient, but this one stumped me on how to set it up.
Thanks in advance.
Click here to see answer by stanbon(75887)

Question 25491: Hey Im sommer
what is 66% of 45? I tried but I dont under stand
Thank You
Click here to see answer by terbear1963(43)

Question 70791: Hello i need help with for proportion problems if it's possible,the first question is solve the proportion,4over3.2=2overx.The second one is solve the proportion,zover3=z+9over12.The next one is solve the proportion 16over4d+2=8over3.And the last one is find the probability that the name of a month of the year,chosen at random,begins with a consonant and that question the last one i really don't understand at all thanks for the help
Click here to see answer by checkley75(3666)

Question 70932: Use a map scale of 2 inches:25 miles fo find the actual distance for each measurment.
1.) 3 in.=
2.) 1/2 in.=
3.) 5 in.=
4.Anne lives 30 miles from her cousin.On a map she measures 3 in.between their homes.What is the scale of the map?
Click here to see answer by algebrapro18(249)

Question 71057: Twice a number equals the difference of 6 and 4 times its reciprocal. What are the possible numbers?
Click here to see answer by ankor@dixie-net.com(22740)

Question 60302: To Whomever can assist, Thank you!
x - 5/ 3 + 2 = 5/9
Click here to see answer by terbear1963(43)

Question 66844:

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Question 71526: a recipe for green salad for 70 people calls for 18 heads of lettuce. How many heads of lettuce would be needed for 176 people to be served?
Click here to see answer by ptaylor(2198)

Question 71879: Hello I couldn't find the section up here for models or scales but i had a some questions about this topic and I thank anyone who can help me.The first question is, A toy airplane is 10 inches long.If the actual airplane is 75 feet long,find the scale of the model.The next one is,An N-gauge train model is created using a scale of 1:160 ft.If an actual train engine,the K-4,an early twentieth-century engine,is 45 feet long,what is the length of an N-gauge model of the engine in inches.The third one is,The actual distance from Fargo,ND to Minneapolis,MN is 240 miles.If the scale on a map is 1 inch=20 miles,how long is a line on the map connecting the two cities.And the last one is,a bag contains 7 red marbles,3 blue marbles,and 6 green marbles.You choose a marble at random.What are the odds of choosing a green marble. Thank you for anyone that helps me
Click here to see answer by jim_thompson5910(35256)

Question 72195: 21 is 35% of what number?
Click here to see answer by bucky(2189)

Question 72195: 21 is 35% of what number?
Click here to see answer by pradhyumna.kumar@gmail.com(62)

Question 72210: Find 0.1% of 450.
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Question 72209: 28 is 20% of what number?
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Question 72207: find 78.5% of 90.
Click here to see answer by pradhyumna.kumar@gmail.com(62)

Question 72206: find 60% of 48.
Click here to see answer by rmromero(383)

Question 72192: 16 is 40%of what number?
Click here to see answer by Sandacious(9)

Question 72234: 16 is 40% of what number?
Click here to see answer by rmromero(383)

Question 72234: 16 is 40% of what number?
Click here to see answer by babygirl10194(1)

Question 72190: I need help with this problem
In Exercises 14-29, y varies directly as x. Find the constant of variation, and write an equation of direct variation that relates the two variables.
16. y= -16 when x = 2

Click here to see answer by stanbon(75887)

Question 73401: Kay can eat 32 candies in 1 hour. Her sister can eat the same amount in 3 hours. How long will it take them together to eat the 32 pieces of candy.
Click here to see answer by ptaylor(2198)

Question 73583: Why does multiplying two negative numbers equals a positive number?
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Question 73583: Why does multiplying two negative numbers equals a positive number?
Click here to see answer by jim_thompson5910(35256)

Question 73557: A right triangle with sides of length 3 cm, 4 cm, and 5 cm is similar to a right triangle with side lengths 12 cm, 16 cm, and 20 cm. What is the perimeter of the larger triangle? Find the ratio of corresponding sides and the ratio of the perimeters. What do you notice?
Click here to see answer by tazoftroy(22)

Question 18973: Please help me do this problem
A 42-inch-long guitar is 10.5-feet-long on a stadium screen. A drum is 21 inches wide. How wide is the image on the screen?
Click here to see answer by jim_thompson5910(35256)

Question 74700: the taxes on a piece of property valued at $4,000 were $66. At this same rate, what would be the taxes on property valued at $5,500
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Question 74783: the measure of the second angle of a triangle is twice as great as that of the first angle. If the measure of the thrid angle is 20 degrees greater than that of the second angle, what is measure of the third angle
Click here to see answer by ptaylor(2198)

Question 74948: Write a ratio to compare 4.8 miles to 2400 feet.
Click here to see answer by funmath(2933)

Question 74977: in a chocolate factory it took 20 workers 6 days to fil an order for chocolate valentine candy. How long would it take if there were 30 workers?
Click here to see answer by ankor@dixie-net.com(22740)

Question 75029: use 2 unit multipliers to convert 0.75 square meters to square centimeters
Click here to see answer by stanbon(75887)

Question 75173: use two unit multipliers to convert 2 miles to inches .
Click here to see answer by josmiceli(19441)

Question 75162: Two computer programs used 230 megabytes of disks space. If all programs required an equal amount of space,how many megabytes of disk space would be required for 5 programs?
Click here to see answer by checkley75(3666)

Question 75165: After traveling the first 480 miles in 12 hours the traveler increased her speed by 20 miles per hour.How long did it take her to travel the last 300 miles?
Click here to see answer by ptaylor(2198)

Question 76485: Write a proportion. Then determine the missing measure.
1. CHIMNEYS A 6-ft observer casts a 4-ft. shadow at the same time the chimney on the Ohio Power Company casts an 804-foot shadow. How tall is the chimney?
2. BUILDINGS The May Road Apartments in Hong Kong cast a 90-meter shadow at the same time a 1.5-meter tall tenant casts a 0.75-meter shadow. How tall is the apartment building?
3. WORLD RECORDS The world's tallest man lived from 1918 to 1940. he cast a
4-foot 5 1/2inch shadow when a 6-foot pole cast a 3-foot shadow.
How tall was he?
4. SHADOWS A man casts a 14-foot shadow. A 4-foot child casts a 9-foot 4-inch shadow at the same time. How tall is the man?
Click here to see answer by checkley75(3666)

Question 76659: If y varies jointly as x and z and y=10 when z=4 and x=5, find y when x=4 and z=2.
Click here to see answer by stargrl12566(16)

Question 76698: At the close of the stock market on a particular day, each share of a textile company's stock was selling for $12&5/16. The annual earnings per share were $3.52. What is the ratio of selling price to annual earnings?
Click here to see answer by funmath(2933)

Question 77028: 24/(t+8) = 5/3
Click here to see answer by ankor@dixie-net.com(22740)

Question 77031: a teacher wants to make a wall chart of a computer desktop. to make it realistic as possible she wants the desktop icons to be proportional to the size of her 6ft by 6ft chart. the icons on her 15 inch by 15inch computer screen is 3/8inch by 3/8inch, how large should they be on her 6ft by 6ft chart
Click here to see answer by checkley75(3666)

Question 77027: 24/t+8 = 5/3
Click here to see answer by checkley75(3666)

Question 77289: We cannot figure out this problem which is part of a Pythagarian Theorum worksheet:
The bases on a baseball diamond are 90 feet apart. How far is it from home plate to second base? I keep coming up with 180 feet, but that seems to easy...
Click here to see answer by jim_thompson5910(35256)

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, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265