Tutors Answer Your Questions about Proportions (FREE)
Question 1159820: The graph of the line that represents a proportional relationship between y and x has a unit rate of 0.4; that is, a change in 1 unit in x corresponds to a change of 0.4 units in y. The equation of this relationship can be written as:
y = 0.4x
y = 4x
y = 1/4x
y = x
Click here to see answer by MathLover1(20849)  |
Question 1160815: A ball is drawn randomly from a jar that contains 4 red balls, 2 white balls, and 3 yellow balls. Find the probability of the given event.
Write your answer as a simplified fraction.
A red ball is drawn?
A white ball is drawn
A yellow ball is drawn?
Click here to see answer by Boreal(15235)  |
Question 1161670: The electrical resistance R of a wire varies directly as the length L and inversely as the square of the diameter d. Obtain an equation connecting R,L and d if R =27 when L=3 and d=2. Calculate (a) value of R when L=8, d=3
(b) value of d when R=16,L=18
Click here to see answer by Alan3354(69443)  |
Question 1162830: Hello,
Question:
The ratio of the number of toy cars to the number of toy trains in a shop was 2:3. When the shopkeeper bought 30 toy cars, the ratio of the number of toy cars to toy trains became 3:4. How many toy trains were there in the shop.
How would I go about setting up this problem and solving.
Thanks in advance.
Click here to see answer by Boreal(15235)  |
Question 1162830: Hello,
Question:
The ratio of the number of toy cars to the number of toy trains in a shop was 2:3. When the shopkeeper bought 30 toy cars, the ratio of the number of toy cars to toy trains became 3:4. How many toy trains were there in the shop.
How would I go about setting up this problem and solving.
Thanks in advance.
Click here to see answer by solver91311(24713)  |
Question 1163069: While testing the effects of various conditions on memory recall, Dr. Jones determines that memory recall, represented by M, is directly proportional to the square of the number of hours of sleep a participant recieved the night before and inversely proportional to the square root of the calories a participant has consumed that morning. The variable h denotes the hours of sleep the participant recieved, and c represents the number of calories consumed. If k is a constant, which of the following could express h, in terms of c?
a) h=(√c*M)/k
b) h=cM^2k
c) h=(∜c*√M)/k
d) h= ∜(cM) /k
Click here to see answer by solver91311(24713)  |
Question 1164098: A merchant has coffee worth $40 a pound that she wishes to mix with 60 pounds of coffee worth $80 a pound to get a mixture that can be sold for $50 a pound. How many pounds of the $40 coffee should be used?
Click here to see answer by ikleyn(52752)  |
Question 1164654: John and David are running around the same track at the same speed. When David started running, John had already run 3 laps. Con- sider the relationship between the number of laps that David has run and the number of laps that John has run.
b. Kacey is running 100-meter dashes. Each time she runs at a different, but constant speed. Consider the relationship between the speed at which Kacey runs and the time it takes Kacey to run 100 meters.
c. Maleka is running at a constant speed. Consider the relationship between the time Maleka has spent running and the distance she has run.
d. Water is draining out of a tub at aconstantrate. Consider the relationship between the time that has elapsed since water started draining out of the tub and the volume of water remaining in the tub.
e. Water is pouring into a tub at a constant rate. Consider the relationship between the time that has elapsed since water started pouring into the tub and the volume of water in the tub.
Click here to see answer by ikleyn(52752)  |
Question 1165822: A wholesaler sells three types three types of GPS systems. A dealer orders twice as many economy systems at $40 each and 75 more econoplus systems at $80 dollar each than deluxe systems at $140 each for $42,000. How many of each were ordered?
Click here to see answer by Boreal(15235)  |
Question 1166557: At a convenience store, you have a choice of five diet drinks, 10 regular drinks, six bags of fat-free chips, and 10 bags of regular chips. What is the probability that you will buy a regular drink and a regular bag of chips?
Click here to see answer by solver91311(24713)  |
Question 1167750: The ratio of the number of boys to the number of girls in school of 720 student is 3:5. If 16 new girls are admitted in the school .find how many new boys may be admitted so that the ratio of the member of boys to number the girls may change to 2:3
Click here to see answer by solver91311(24713)  |
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