Tutors Answer Your Questions about Linear-systems (FREE)
Question 851706: Solve the system to find (u,v). Hint: x = 1/u and y = 1/v. Use x and y in the equations to solve. Once you solve for x and y, set those solutions equal to 1/u and 1/v, respectively, to find (u,v):
3/u+4/v =1
6/u-2/v=1
Click here to see answer by ewatrrr(24785)  |
Question 852291: if the determinant to system of linear equations is 0 then what do you put as answer example 3x+y=10 and 3x+y=4 no solution or infinitely many solutions is what the teacher is looking for original problem 3x+y=10 y=-3x+4
Click here to see answer by ewatrrr(24785)  |
Question 853708: The units digit of a two-digit number is 1 less than 3 times the tens digit. if the digits are reversed , the new number is 45 more than the original number. find the number .
what i have so far
U= 3X-1 (u being unit , x being tens)
10x+ U = 10u+x -45
plugged everything and answer came out decimals. which isn't on the answer sheet lol . i probably did some wrong math somewhere down the line. help me out . Thx
Click here to see answer by josgarithmetic(39617) |
Question 851018: A family is canoeing downstream (with the current).Their speed relative to the banks of the river averages 2.75 mi/h. During the return trip, they paddle upstream (against the current), averaging 1.5 mi/h relative to the riverbank.
A. Write an equation for the rate of the canoe downstream.
B. Write an equation for the rate of the canoe upstream.
C. Solve the system to find the family's paddling speed in still water.
D. Find the speed of the current of the river.
Click here to see answer by richwmiller(17219)  |
Question 854853: Write the slope-intercept form of an equation of the line that passes through (4,-6) and is parallel to y= -3/4x + 1 .
I thought the answer was y= -3/4x - 9 . The answer is actually y= -3/4x -3 . Could you please explain what I did wrong?
Thank you,
Isabella
Click here to see answer by Fombitz(32388)  |
Question 855852: I need help figuring out how to put this into an equation so that I can work it and get the answers.
Kevin has half of his investments in a stock paying an 8%dividend and the other half in a stock paying 11%. if his total annual interest is $570,how much does he have invested?
answer: how much money in each account and what is the total amount invested.
Click here to see answer by ankor@dixie-net.com(22740)  |
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