Tutors Answer Your Questions about Linear-equations (FREE)
Question 973386: 1.find the equation of the line with the given slope and passing through the given point with 1 and point (-2,-2)
2.tuition fees change at university are given by f(x)=135 x + 450
3.for the line -2x + 9y =6 find
the slope
the y-intercept
the x-intercept
4.Find the x-and y- intercepts of the line 8x + 6y =24 and sketch its graph.
Click here to see answer by macston(5194)  |
Question 973467: I have to find the y intercept of the equation this is the equation. 3x-4y=50. But i forgot how to form the problem in a way that i can solve it. And google is just dumb. Its giving me the answer but i want to know how to solve it too.
Click here to see answer by josmiceli(19441)  |
Question 973650: I am trying to figure out a system of equations problem:
-2x=-10y-2
-x=8y=5
Here's what I did:
I chose to use the top equation:
-2x=-10y-2
+2 +2
-2x+2= -10y
/10 /10
Y= -2/10X =2
Then, I plugged that answer into the equation:
-x+8(-2/10x+2) =5
I had no idea of how to finish, but this is what I did..........
I started with what was in the parenthesis and multiplied 8 times -2 and got -- -16/10x.
Then I multiplied 8 times the other 2 and got 16
-x + -16/10x + 16= 5
Then, I added the -x to the -16x and got -17/10x + 16= 5
I then divided 17/10 from both sides and got a -.0647058.... for x
I stopped here, because the answer is not making any sense
Click here to see answer by stanbon(75887) |
Question 973650: I am trying to figure out a system of equations problem:
-2x=-10y-2
-x=8y=5
Here's what I did:
I chose to use the top equation:
-2x=-10y-2
+2 +2
-2x+2= -10y
/10 /10
Y= -2/10X =2
Then, I plugged that answer into the equation:
-x+8(-2/10x+2) =5
I had no idea of how to finish, but this is what I did..........
I started with what was in the parenthesis and multiplied 8 times -2 and got -- -16/10x.
Then I multiplied 8 times the other 2 and got 16
-x + -16/10x + 16= 5
Then, I added the -x to the -16x and got -17/10x + 16= 5
I then divided 17/10 from both sides and got a -.0647058.... for x
I stopped here, because the answer is not making any sense
Click here to see answer by Boreal(15235)  |
Question 973960: Please help me solve this.
For the following function determine the values of x for which f is (a) an increasing function (b) a decreasing function (c) constant
f(x) = (4x+20)^9
-----------
4
f'(x) = 9((4x+20)^8)
Click here to see answer by Boreal(15235)  |
Question 974013: The revenue for selling x units of a product is R=28.25x. The cost of producing x units C= 11.85x+50,000. For the producer to obtain a profit the revenue must be larger than the cost. For what values of x will this product return a profit? Round your answer to the nearest whole unit.
Click here to see answer by stanbon(75887) |
Question 974048: Average cost of a new car has been changing approximately linearly with time. In 1990, the average cost was $16,950, and the average cost was $27,957 in 2008. Let X= number of years after 1990 and let Y= average cost of a new car. A) What ordered pairs can be written to express this information? and B) write equation of the line through these points in point slope form.
I set up ordered pairs as (1990, 16790) (2008, 27957). I labeled ordered pairs as X1,Y1 and X2,Y2, respectively to solve for the slope. Once I get slope can solve for equation of line using slope intercept formula Y= mx +b. I believe my order pairs are not correct and therefore my slope not correct and can not find error. Please provide assistance with correct ordered pairs and help with equation of the line through the ordered pairs two points in point-slope form.
Click here to see answer by stanbon(75887) |
Question 974619: Need help on the second part of this word problem. Showing steps would be helpful...Thank you :)
Construction of the Tower of Pisa was completed in 1360. By 1990, the tilt of the tower was so severe that it was closed for renovation. Renovators were able to reduce the tower's 1990 tilt by 17 inches. The resultant tower leans 13.5 feet (162 inches) off the perpendicular. When the tower was reopened in 2001, officials forecast that it would take 300 years for the tower to return to its 1990 tilt.†
(a) Construct a linear formula that models the lean of the renovated tower, where l is the number of inches from the perpendicular and t is the number of years since 2001.
The formula is: 162+(17/300)t
Use the formula from part (a) to predict the lean of the tower in 2150. (Round your answer to two decimal places.)
Click here to see answer by rothauserc(4718)  |
Question 974782: Need help on how to work this problem and steps on how to solve it....Thank you :)
Based on data from June 2006, the forecast for maximum 5-day snow runoff volumes for the American River at Folsom, CA, can be modeled by
v = f(t) = −2.606t + 131.8
thousand acre-feet, where t is the number of days since the end of May 2006.† That is, the model forecasts the snow runoff for the 5-day period beginning on the selected day of June 2006. Find the inverse function.
f −1(v) =
Determine the value of
f −1(61.8).
(Round your answer to two decimal places.)
Click here to see answer by rothauserc(4718)  |
Question 975059: Need help on how to solve this...please include steps. Thank you :)
Assume that the real-world context can be accurately modeled with a linear function.
Between 1900 and 2003, the life expectancy for men and women in the United States increased dramatically. For men, life expectancy increased from 48 to 75 years. For women, life expectancy increased from 51 to 80 years.†
Model male life expectancy M as a function of female life expectancy f. (Round your coefficients to two decimal places.)
Click here to see answer by stanbon(75887) |
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11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 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20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 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30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 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