Tutors Answer Your Questions about Linear-equations (FREE)
Question 721765: Sometimes mathematical models other than linear models are appropriate for data. Suppose that an equation of the form y=ax^2+bx+c is an appropriate model for the ordered pairs (x1,y1),(x2,y2), and (x3,y3). Then it is necessary to find the values of a,b, and c such that the given ordered pairs are solutions of the equation y=ax^2+bx+c. To do so, substitute each ordered pair into the equation. Solving the resulting system of three linear equations in three unknowns will give the required values of a, b, and c.
The tables gives the total beef supply (in billions of pounds) in the United States in each of the years listed.
Total U.S Beef Supply
Year- Beef Supply (billions of pounds)
1999- 29.8
2001- 29.9
2003- 30.1
(a) Write the data as ordered pairs of the form (x,y), where y is the beef supply (in billions of pounds) in the year x (x=0 represents 1999).
(b) Find the values of a, b, and c such that the equation y=ax^2+bx+c models this data.
(c) According to the model, what was the U.S. beef supply in 2002?
Click here to see answer by stanbon(75887) |
Question 721785: 2x-3y= -6
I need help understanding how you would graph this. I am not understanding. I have found the slope and Y-intercept.
Slope is 2/3
Y-intercept is -2
I'm unsure if these are correct so if you could please help me make sure I did this problem correct I would apperciate it.
Click here to see answer by Alan3354(69443)  |
Question 721855: Water is slowly leaking from a large bottle. The percent y (in decimal form) of water remaining the bottle after x hours is y = -0.02x + 1
a. graph the equation
b. interpret the x and y intercepts
c. interpret the slope
d when will the bottle be one quarter full
Click here to see answer by solver91311(24713)  |
Question 722531: Please help me solve these Equations.
1)Find the equation (in terms of x) of the line through the points (-5,3) and (5,-2)
2)Find the equation of the line passing through the points (6,4) and (-18,-40). Write your answer in the form y = m x + b.
3)Find the equation of the line with Slope = 8 and passing through (5,42). Write your equation in the form y=mx+b.
Click here to see answer by mananth(16946)  |
Question 722817: 1 (less than or equal to) 3/2z-2 (less than or equal to) 4
It says to solve the given inequality for the given variable.Simplify your
solution, and give your answer in algebraic notation. I have been stuck on this
one for 2 days. I need help.
Click here to see answer by solver91311(24713)  |
Question 723064: Please solve this word problem ; The middle digit of a three digit number is zero. The number is 34 times the sum of its digit. The new number obtained by interchanging the digit in the unit's and the hundered's place is more than the original number by 396. Find the original number.
Click here to see answer by lwsshak3(11628) |
Question 723064: Please solve this word problem ; The middle digit of a three digit number is zero. The number is 34 times the sum of its digit. The new number obtained by interchanging the digit in the unit's and the hundered's place is more than the original number by 396. Find the original number.
Click here to see answer by josgarithmetic(39617) |
Question 723416: Suppose the value of a car depreciates linearly for 15 years after it is bought. Also, suppose the value of the new car is $25,000 and the value 10 years after it is bought is $9,000. Let y be the value of the car x years after it is bought. Find a linear equation relating x and y. Write in y = mx + b form. I came up with y=1,600 + 23,400. I don't feel this is correct???
Click here to see answer by stanbon(75887) |
Question 723446: The equation of line r is y-2=1/10(x+9). line "s" is parallel to line "r" and passes through (10,1) What is the equation of line "s"?
Write the equation in slope-intercept form. Write the numbers in the equation as proper fractions, improper fractions, or integers.
Click here to see answer by mananth(16946)  |
Question 723687: One of the problems i am stuck on: Complete the following table and DO NOT GRAPH
I have been stuck on solving for y when x=0. i think i am doing it right but would greatly appreciate if someone double checked my work, this is what i got when i completed my table: x=0,1,-2,-5,-6.5,1 y=-2.66,4,0,-4,-6,4 not sure why the decimal on only one point
x=(3/4)y-2 (x equals three fourths y minus 2)
x = 0,?,?,-5,?,1
y = ?,4,0,?,-6,?
Click here to see answer by solver91311(24713)  |
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