Tutors Answer Your Questions about Systems-of-equations (FREE)
Question 136565: Could someone plese help me with this? Thank You!
Cars Plus charges a daily fee plus a mileage fee for renting its cars. Lance was charged $156 for 3 days and 300 miles, while Linda was charged $284 for 5 days and 600 miles. What does Cars Plus charge per day and per mile?
Click here to see answer by ankor@dixie-net.com(22740)   |
Question 136740: Hi,
Can you help me with this math problem?
Solve the problem.
15.) The sum of the squares of the digits of a positive two-digit number is 20, and the tens digit is 2 more than the units digit. Find the number.
The answer should be 42
Click here to see answer by solver91311(24713)  |
Question 136740: Hi,
Can you help me with this math problem?
Solve the problem.
15.) The sum of the squares of the digits of a positive two-digit number is 20, and the tens digit is 2 more than the units digit. Find the number.
The answer should be 42
Click here to see answer by Earlsdon(6294) |
Question 136739: Hi,
Can you help me with this math problem?
Solve the problem.
14.)The sum of three numbers is -5. The first, minus the second, plus 4 times the third, is -20. The third, plus 4 times the first, plus the second, is -20. What are the numbers?
The answer should be (-5,3,-3)
Click here to see answer by checkley77(12844) |
Question 137217: The bill for three glasses of orange juice and 5 pancake specials is 7.60, but the bill for five glases of orange juice and 4 pancake specials is 7.90. What would be the bill for one glass of orange juice and one panckae special? Write a system of equations for the given facts. Solve the system.
Click here to see answer by checkley77(12844) |
Question 138767: A cellular phone compnay offers a contract for which the cost C, in dollars, of t minutes of telephoning is given by C=0.25(t-300)+46.95, where it is assumed that t>300 minutes. What times will keep cost between $ 95.20 and $124.20?
For the cost to be between $ 95.20 adn $124.20,the telephoning times must be between ___ minutes and ___ minutes.
Click here to see answer by stanbon(75887) |
Question 138950: I have three quadratic equations that need to be solved and graphed on one graph to show the relationship between the size of three curves.
we choose at least 6 plots - I chose for X - o,1,2,3,-1,-2,-3. I have to solve for Y.
The equations are:
1. y=2x^+10x+12
2. y= -1/2x^+4x+3
3. 2y=x^+4x+5
My problem has been how to solve these type of equations
Any help would be appreciated
Thank YOu
Sorry, my name is Leonora
Click here to see answer by solver91311(24713) |
Question 140798: The path of a fallen object is given by the function s= -16t^2+v0t+s0, where v0 represents the initial velocity in ft/sec and s0 represents the initial height. The variable t is time in seconds and s is the height of the object in feet.
If a rock is thrown upward with an initial velocity of 32 feet per second from the top of a 40 foot building,how high is the rock after 0.5 seconds? After how many seconds will the rock reach maximum height?
Ive already answered the first question, i think it is 52 feet. Is this correct?
How do i set up my equation to answer the second question? (step by step please)
Click here to see answer by Fombitz(32388)  |
Question 13699: use the order of operations to simplify the expression
7-4[3-(4y-5)]
My book says the answer is 16y-25. I can not figure out how to get that answer.This is what I came up with
7-4[3-(4y-5)]
7-4[3-(-1y)]
7-4*4y
7-16y
Click here to see answer by jscott(1) |
Question 141993: What are the steps taken to solve this problem algebraically?
5-(2)/(x-6) = (10-2x)/(x-6)
I know that first i have to find the LCD which is 6, then multiply that times both sides of the equation. I also know that the answer will be x=6 because of the denominator (it has a variable)and it can't possibly be a solution. Can you help me set this equation up step by step so that i can see exactly how the answer is obtained
Click here to see answer by HyperBrain(694) |
Question 142781: Solve the system by the elimination method.
0.3x-0.2y=4
0.4x+0.5y=-55/17
Multiply equations by 10 to eliminate decimals.
3x-2y=40
4x+5y= -550/17
Then to eliminate y multiply the first equation by5 and the second equation by 2.
15x-10y=200
8x+10y=-1100/17
I have no idea what do do from here...Everytime I try my fractions come out wrong and I get lost.
Click here to see answer by checkley77(12844) |
Question 143251: A motor boat traveled 12 miles with the current, turned around, and returned 12 miles against the current to its starting point. The trip with the current took 2 hours and the trip against the current took 3 hours. Find the speed of the boat and the speed of the current.
Click here to see answer by checkley77(12844) |
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