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Tutors Answer Your Questions about Expressions-with-variables (FREE)
Question 44133: help please: if the answer is not rational round it to the nearest tenth of a unit. "a telephonne pole is supported by a guy wire attached to the top of the pole. the pole is 7 meters tall, above the ground. how long must the guy wire be if it is attached to a rod 6 meters from the bottom of the pole.?"
Click here to see answer by venugopalramana(3286)   |
Question 44131: may you please help me...."the length of a rectangle is 6 inches more than three times its width. if the width were increased by 4 and the length decreased by 10, the area of the new rectangle would equal the area of the original rectangle. find the length and width of the original rectangle.
Click here to see answer by Paul(988)  |
Question 44287: A total of $6000 is deposited into two simple interest accounts. on one account th annual simple interest rate is 7.5% and on the second 11.4%. how much should be invested in the 11.4% account so that the total amount of interest is $528?
(sixth edition beginning algebra with applications ISBN: 0-618-30605-6
Click here to see answer by Nate(3495) |
Question 44433: Mendy was working out on the treadmill. She worked out for 15 minutes. Part of the time she was walking at 3.3 miles per hour. Her heart rate during that time was 108 beats per minute. THe rest of the time she was slowly jogging at 4.2 miles per hour. Her heart rate during that time was 129 beats per minute. During the 15 minutes she covered .89 mile.
How much time did she spend walking and how much time did she spend jogging?
What was her average heart rate during the 15 minutes?
Click here to see answer by Paul(988) |
Question 44768: A jar full of nickels and dimes contains 180 coins . If the total amount of money contained in the jar is $13.000, how many nickels are in the jar?
I set up the equation,
$0.05x + 0.10y = $13.00
and x + y = 180
x=nickels and y=dimes
i really don't remember how to solve it now, since it has two variables...please if someone could help me, i would really appreciate it [please by today?] thanks
Click here to see answer by OHtutor(16) |
Question 44768: A jar full of nickels and dimes contains 180 coins . If the total amount of money contained in the jar is $13.000, how many nickels are in the jar?
I set up the equation,
$0.05x + 0.10y = $13.00
and x + y = 180
x=nickels and y=dimes
i really don't remember how to solve it now, since it has two variables...please if someone could help me, i would really appreciate it [please by today?] thanks
Click here to see answer by adamchapman(301) |
Question 44769: another question, sorry again =]
How much of a 20% acid solution should be mixed with 80 mL of 5% acid solution to obtain a 12% acid solution?
well, i tried it, but no luck...
0.20(x mL) + 0.05(80 mL) = 0.12(80 + x)
but when i solve it, the answer doesn't come out reasonable..maybe im solving it wrong, i don't know, but please help =]
Click here to see answer by josmiceli(3003) |
Question 44769: another question, sorry again =]
How much of a 20% acid solution should be mixed with 80 mL of 5% acid solution to obtain a 12% acid solution?
well, i tried it, but no luck...
0.20(x mL) + 0.05(80 mL) = 0.12(80 + x)
but when i solve it, the answer doesn't come out reasonable..maybe im solving it wrong, i don't know, but please help =]
Click here to see answer by shalu.srk(1) |
Question 45108: Hi,
I would really appreciate help with this problem:
George and Michael working together can do a job in 24 hours. After George being working alone for 7 hours, Michael joined him and together finished the job in 20 more hours. How long would it take each one working alone to do the job?
Thanks in advance,
Louis
Click here to see answer by stanbon(26259) |
Question 45517: please help me solve this problem/ question
Fact 1: A divided by C = A
Fact 2: A plus B = A
Fact 3: ABC = 1
If Fact 1 and 2 are true why is Fact 3 not true?
and
What are the values of each of the variables in Fact 1 and 2?
Thank You!!!
Click here to see answer by stanbon(26259) |
Question 45912: The equation h = -16t^2 – 32t + 112t gives the height of an arrow, shot upward from the ground with an initial velocity of 112ft/s, where t is the time after the arrow leaves the ground. Find the time it takes for the arrow to reach a height of 180 ft.
Not sure where to start on this one.
Thanks for help
Click here to see answer by Nate(3495) |
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