Questions on Algebra: Decimal numbers, power of 10, rounding answered by real tutors!

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Question 1109382: y is directly proportional to x, and y = 20 when x = 6. What is y when x = 14?
Click here to see answer by Alan3354(69443)

Question 1109381: y varies directly with x, and y = 60 when x = 20. What is y when x = 16?
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Question 1109381: y varies directly with x, and y = 60 when x = 20. What is y when x = 16?
Click here to see answer by ikleyn(52778)

Question 1109483: If the volume of a gas is 100 cubic centimeters when the pressure is 76 centimeters, what will be the volume when the pressure is 38 centimeters?
Click here to see answer by Alan3354(69443)

Question 1109481: m varies inversely with t, m = 61.2 when t = 25.9. What is m when t equals = 16.8?
Click here to see answer by Alan3354(69443)

Question 1110293: 129.207 rounded to the nearest penny

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Question 1110377: A telephone directory has 743 pages and an average of 380 entries on each page. Find and correct to the nearest thousand, the number of entries in the directory. And, if 17% of the subscribers do not have their telephone numbers listed in the directory, find the total number of subscribers. Give your answer correct to the nearest thousand.
Click here to see answer by Boreal(15235)

Question 1110930: the diagram shows a partly filled oil tank
width=2
length=5
height =3
the depth of oil in the tank is 1.2m
1 cubic metre is equivalent to 1000 litres
work out the quantity of oil in the tank
give your answer in litres
Click here to see answer by ikleyn(52778)

Question 1111332: The number of cars passing a certain junction was counted to be 8288. This was a decrease of 86% compared to the previous week. Find the number of cars passing the junction in the previous week.

Click here to see answer by Boreal(15235)

Question 1113515: If the power demands in a 110volt electric circuit in a home vary between 220 and 2750 watts,what's the range of circiut flowing through the circuit?
Click here to see answer by ikleyn(52778)

Question 1113519: A 1200 square foot rectangular garden is enclosed with 150 feet of fencing. Find the dimensions of the garden to the nearest tenth of a foot.
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Question 1113518: The daily production P in an automobile assembly plant is always within 20 units of 500 units. Write the daily production as an absolute value inequality, then solve to find the range of daily productions possible.
Click here to see answer by greenestamps(13200)

Question 1113520: The diagonal of a rectangle is 10 inches and the area is 45 square inches. Find the dimensions of the rectangle, correct to one decimal place.
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Question 1113525: Find a number such that subtracting its reciprocal from the number gives 16/15
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Question 1113669: One pipe can fill a tank in 5 hours less than another. Together they can fill the tank in 5 hours. How long would it take each alone to fill the tank? Compute the answer to two decimal places.
Click here to see answer by josgarithmetic(39617)

Question 1113670: When a stone is dropped into a deep well, the number of seconds until the sound of a splash is heard is given by the formula t= sqrt (x)/4+x/1100, where x is the depth of the well in feet. For one particular well, the splash is heard 14 seconds after the stone is released. How deep (to the nearest foot) is the well?
Click here to see answer by ikleyn(52778)

Question 1113668: If N=2.37 represents a measurement, then we assume an accuracy of 2.37+_0.005. Express the accuracy assumption using an absolute value inequality.
Click here to see answer by solver91311(24713)

Question 1113673: A crew of four practices by rowing up a river for a fixed distance and then returning to their starting point. The river has a current of 3km/h.
(A) Currently the crew can row 15km/h in still water. If it takes them 25 minutes to make the round-trip, how far upstream did they row?
(B) After some additional practice the crew cuts the round-trip time to 23 minutes. What is their still-water speed now? Round answers to one decimal place.
Click here to see answer by ikleyn(52778)

Question 1113707: Bradley has a change jar that contains only dimes and pennies. He has 81 coins which add up to a total of $4.41. How many of each type of coin does he have?

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Question 1114309: Two gears rotate so that one completes 1 more revolution per minute than the other. If it takes the smaller gear 1 second less than the larger gear to complete 1/5 revolution, how many revolutions does each gear make in 1 minute?
Click here to see answer by ikleyn(52778)

Question 1115211: (1/n-1)-(1/n)=5/60
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Question 1115211: (1/n-1)-(1/n)=5/60
Click here to see answer by ikleyn(52778)

Question 1115209: A student group flies to Cancun for spring break, a distance of 1200 miles. The plane used for both trips has an average cruising speed of 300 miles per hour in still air. The trip down is with the prevailing winds and takes ( one hour and a half) less than the trip back, against the same strength wind. What is the wind speed?
Click here to see answer by ikleyn(52778)

Question 1115901: Remove the brackets and simplify
2ab(3a-5b)^2-2ab(3a+5b)(3a-5b)-20ab^2(5b-3a)
Click here to see answer by MathLover1(20849)

Question 1115902: 1. The fourth term of a geometric sequence is 2 and the seventh term is 16; determine:
(a) the first two terms
(b) the sum of the first 20 terms (two decimals)
Click here to see answer by passionn(5)

Question 1116919: Express the following in rational form
a) 0.3434343434343434343434...
b)2.457777777777777777777777...
Click here to see answer by Alan3354(69443)

Question 1118492: Quick question about dividing with decimals. I need to complete long division on 0.57/-0.19. My calculator shows an answer of -3. Should it be -0.03? I don�t know how to do long division with decimals so I�m completely lost.
Thanks!
Click here to see answer by ankor@dixie-net.com(22740)

Question 1119346:
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Question 1120346: write down all numbers which can be rounded off to 250
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Question 1120476:

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Question 1120614: Find the slope of the line through the points P and Q when:
a. P(1,3) and Q(x, x2+3x-1)
b. P(x, x2+3x-1) and Q(x+h, (x+h)2+3(x+h)-1)

Answer:
a. m = Answer
x+4
b. m = Answer
h^2+2xh+3h+6x-2/h

is my answer correct?

Click here to see answer by solver91311(24713)

Question 1120613: Let f(x)=x+1 and define s(x) to be the slope of the line through the points (0,0) and (x,f(x)). a. Evaluate: s(5) and s(-2); b. Find an equation for s(x) in terms of x.
Note that fractional answers must be expressed like -5/6, and answers with exponents like (x^2-1)/(x+3). Use lower case letters.and do not use spaces in your answers.
Answer:
a. s(5) = Answer
and s(2) = Answer
b. s(x) = Answer

Click here to see answer by solver91311(24713)

Question 1120615: A function f is given by f(4x-1) = 4x2+5. Evaluate f(15).
Answer: f(15) = Answer
905

Click here to see answer by greenestamps(13200)

Question 1120658: If sally can paint a house in 4 hours and john can paint the same house in 6 hours how long it take for both of them to paint a house togethe
Click here to see answer by josgarithmetic(39617)

Question 1121247: Answer Checking:
What is the slope of the tangent line through (0,-3) and (x,y) for y = 3x� - 3
and x=1?
my answer is m=3x^2
but i think their looking for non variable answer
Click here to see answer by solver91311(24713)

Question 1121246: What is the slope of the tangent line through (0,-3) and (x,y) for y = 3x2 - 3 and x=1?
Click here to see answer by Edwin McCravy(20054)

Question 1121248: https://ibb.co/e4fnwU
Please help
Click here to see answer by Boreal(15235)

Question 1121248: https://ibb.co/e4fnwU
Please help
Click here to see answer by solver91311(24713)

Question 1121307: I was asked to solve this linear equation.
A man is four times as old as his son. In four years time he will be three times older in age, what are their ages now
Click here to see answer by Theo(13342)

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