Tutors Answer Your Questions about Graphs (FREE)
Question 183082: The body mass index, I, can be used to determine an individual's risk for heart disease. An index less than 25 indicates a low risk. The body mass index is given by the formula, or model, I = 700w/H^2, where W = weight, in pound's, and H = height, in inches. Jerome is 75 inches tall. What weights will keep his body mass index between 25 and 33?
Jerome's body mass index will fall between 25 and 33 for the set of all weights such that ____< W < ____.
(round to the nearest whole number as needed)
Click here to see answer by stanbon(57967)  |
Question 183397: The function H described by H(x)=2.75x+71.48 can be used to predict the height in centimeters, of a woman whoes humerus (the bone from the elbow to the shoulder) is x cm Long.
Predict the height of a woman whoes humerus is 37 cm long.
The predicted height of a woman whose humerus is 37 cm long is ____ cm
Click here to see answer by jim_thompson5910(28715) |
Question 183326: 3.
I've always been terrible at drawing up graphs. I'm hoping that I'll be able to finally understand this better by seeing it action.
Graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph.
y = x + 3
thank you.
Click here to see answer by stanbon(57967) |
Question 183459: Soy bean meal is 16% protei;.cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320 lb mixture that is 11% protein.
How many pounds of the cornmeal should be in the mixture?
____ Pounds
How many pounds of soybean mixture should be in the mixture?
______ Pounds
Click here to see answer by stanbon(57967) |
Question 183462: I tried to get the lowest common denominator and go from there, but I am now stuck with a 9 over m= 1 over m. I think that I need to get either the 9 or the 1 to the other side, but it is a fraction so I don't know how to do that
Click here to see answer by stanbon(57967) |
Question 183569: Trains A and B are traveling in the same direction on paralle tracks. Train A is traveling at 100 mph and train B is traveling at 120 mph. Train A passes the station at 9:20 P.M. If train B passes the same station at 9:32 P.M., at what time will train B catch up to train A? __:___ P.M. or A.M.
Click here to see answer by checkley77(12569) |
Question 183568: The equation y=-1777x+27,153 can be used to predict the number y of gun deaths in the United States x years after 2000, that is x=0 corresponds to 2000,x=3 corresponds to 2003 x=4 corresponds to 2004, and so on. Predict the number of gun deaths in 2004 and 2009. In what year will the number of gun deaths be 7606?
The predicted gun deaths in 2004 will be _____.
The predicted gun deaths in 2009 will be ______.
The predicted gun deaths in 7606 in the year _____.
Click here to see answer by checkley77(12569) |
Question 183568: The equation y=-1777x+27,153 can be used to predict the number y of gun deaths in the United States x years after 2000, that is x=0 corresponds to 2000,x=3 corresponds to 2003 x=4 corresponds to 2004, and so on. Predict the number of gun deaths in 2004 and 2009. In what year will the number of gun deaths be 7606?
The predicted gun deaths in 2004 will be _____.
The predicted gun deaths in 2009 will be ______.
The predicted gun deaths in 7606 in the year _____.
Click here to see answer by stanbon(57967) |
Question 183758: Media services charges $20 for a phone and $30/month for its economy plan. The equation c=30t+20 describes the total cost, c, of operating a Media services phone for t months.
he total cost for 8 months of service is $_____?
If a customer only $90 available, how many months of service can she recieve?
A) 2
B) 2 1/2 C) 3
D) 2 1/3
Click here to see answer by rachel42(1) |
Question 183914: In 1994, the life expectancy of males in a certain country was 73.9 years. In 2000, it was 76.4 years.Let E represent the life expectancy in year t and let t represent the number of years since 1994.
The linear function E(t) that fits the data is
E(t) = ____t+____.
(round to the nearest thenth.)
Use the function to predict the life expectancy of males in 2003.
E(9) = ______
(round to the nearest tenth)
Click here to see answer by stanbon(57967) |
Question 183955: I am really having trouble with this. If anyone can please help me I'd appreciate it a lot. I am not sure how to do this. The data I collected for this problem is:
McDonald's Cheesburger
# of fat calories: 103
Grams of sat. fat: 6.0 g
Wendy's cheesburer
# of fat calories: 230
Grams of sat. fat: 6.0g
Culvers cheeseburger
# of fat calories: 180
Grams of sat. fat: 8.0
McD's large fries
# of fat calories: 230
Grams of sat fat: 4.5g
Culvers lrg. fries
# of fat calories 211
Grams of sat fat: 10.8g
Wendy's lrg fries
# of fat calories: 220
grams of sat. fat: 0g
Collect data from several fast food chains on the number of fat calories and grams of saturated fat in menu items. Record at least 12 ordered pairs of (fat calories, grams of saturated fat). Organize your data in a table.
II. Make a scatter plot of the data on graph paper. Be sure to label the axes and use an appropriate title for the graph.
III. Draw a trend line for the scatter plot. Use the following scatter plot of the ordered pairs (fat grams, total calories) as an example.
IV. Calculate the slope of the trend line. (Choose two points on the line and find vertical change over horizontal change.)
V. Using the slope and y-intercept, write the equation of the trend line ( y = mx + b).
VI. Choose a "calories from fat" value that is not in your collected data set and that is at least 10 fat calories away from any collected value. Use the equation calculated in step V to predict the number of fat grams in an item having that number of fat calories. Be sure to show your work.
VII. Search for an item in a fast food menu having the same number of fat calories as the one you chose above. (If you cannot find the exact value, get as close as you can.) Compare the calculated value from step VI to this actual value. Explain why (or why not) you would have expected your prediction (calculated value) to be close to the actual value.
Thank you very much
Click here to see answer by solver91311(17077)  |
Question 183971: Cara likes candles. She also likes mathematics and was thinking about using algebra to answer a question that she had about two of her candles. Her taller candle is 16 centimeters tall. For each hour it burns, the candle loses 2.5 centimeters in height.
Her short candle is 12 centimeters tall and loses 1.5 centimeters in height for each hour that it burns. I need help to determine whether these two candles would ever reach the same height at the same time if allowed to burn the same length of time. If it is not possible, I need to know why it could not happen and what would need to be true in order for them to be able to reach the same height. We need to use multiple representations, justify your results and explain your thinking.
Click here to see answer by stanbon(57967) |
Question 184177: I am having a terrible time trying to figure this out, any help will be greatly appreciated
Bill and Barbara collected the following data in a chemistry experiment when they were in lab. They were comparing two thermometers. The thermometers were under constant conditions except that the heat was changing under each thermometer as time passed. T is the time of the reading. X is the reading of the first thermometer. Y is the reading of the second thermometer. Bill and Barbara are assuming a linear relationship between the readings X and Y on the thermometers and are to find a linear equation relating this (x,y) relationship.
See data collection chart below.
Time starts at t = 0 min.
time
0
10 min.
20 min
30 min.
x
10
15
28
40
y
50
59
82.4
104
a. Create a graph locating these data points on an (x,y) coordinate plane.
b. Find the slope of this graph.
c. Create the linear equation based on the data info collected.
Click here to see answer by stanbon(57967) |
Question 184173: #3
what does this look like in a graph after being plotted out?
First, set Y to 0 then solve for X
2X - 7
2X = -7
X = -7/2
Now plot (-7/2, 0)
Then set X to 0 and solve for Y
Y = -2(0) - 7
Y = -7
Now plot (0,-7)
1 = -2x -7
8 = -2x
8/-2 = x
x = -4
Plot (-4, 1)
I figured out this much, but cannot figure out how to get the graph. the original problem was to graph: 7.1x - 3.9y = 1.4
Help is appreciated. This is going on for quite a while and I really want to find the way to do this.
Click here to see answer by Alan3354(31522)  |
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