Tutors Answer Your Questions about Equations (FREE)
Question 38561: 1. Bob left Boston at 9:00am and drove to New Hampshire at 60 km/h. Mike left Boston at 11:00am and traveled the same route to New Hampshire. If both men arrived in New hampshire at 4:00pm, at what rate did Mike travel?
2. Two jets are traveling toward each other and are 4000 km apart. The rate of one jet is 100 km/h faster than the rate of the other. If the jets pass each other after 2.5 hours, what is the rate of the faster jet?
3. Mary drove from her home to a service station at 48 km/h. She returned home by bycycle at 16 km/h. The entire trip took 4 hours. How far was the service station from Mary's home?
4. A plane on a search mission flew east from an airport, turned, and flew west back to the airport. The plane cruised at 300 km/h when flying east, and 400 km/h when flying west. The plane was in the air for 7 hours. How far from the airport did the plane travel?
5. A motorboat can travel upstream on a river at 18 km/h and downstream at 30 km/h. How far upsteam can the boat travel if it leaves at 8:00am and must return by noon?
Click here to see answer by Paul(988)  |
Question 38854: This is a question from my review sheet for my final also.. not sure if I am doing this right..
Solve the system by the method of substitution.
y=x^2+3x+6
y=x^2+3
I made this equation: x^2+3=x^2+3x+6
I subratcted the 3 from both sides to get: x^2=x^2+3x+3
WHERE DO I GO FROM HERE??
Click here to see answer by lyra(94)  |
Question 38851: I am studying for a final in College Algebra, this question comes from my review sheet. The final is tomorrow so any immediate help is GREATLY appreciated.
Find the equation of the parabola which passes through the points (0,4),(-2,0),(-3,1). Write the equation in quadratic form.
Click here to see answer by AnlytcPhil(1806)  |
Question 39040: A coffee merchant has coffee beans that sell for $9 per pound and $12 per pound. The two types are to be mixed to create 100lb of a mixture that will sell for 11.25 per pound. how much of each type of bean should be used in the mixture ? label your answers
Click here to see answer by checkley71(8403) |
Question 39081: Hello!
Can someone help please?
My question is:
Nine men earned in a certain time $333.60. One received $5.00, others $3.75 and the rest $1.35 for a day's work. How long did they work?
I know the answer is 12 days but I don't know how to work it out.
Thanks
Marcee
Click here to see answer by askmemath(368) |
Question 39320: How can you solve an equation with one variable and two numbers if they have a negative and positive sign. It will be okay if you give me an example of how to solve an equation. If it`s not a problem, could show step by step please and thank you.
Click here to see answer by KneesAndToes(13) |
Question 39339: Ok, I've done all the surrounding problems, but this one I can't seem to figure out. Help is greatly appreciated!
MOTION PROBLEM
Martina leaves home at 9am, bicycling at a rate of 24 mi/h. Two hours later, John leaves, driving at a rate of 48 mi/h. At what time will John catch up with Martina.
I know it's d=rt and I think it starts out like this
24x + 45(x-2)
Click here to see answer by checkley71(8403) |
Question 39336: I have worked this problem AT LEAST 15 times and I just cannot make my answers work in the original question. I think that the negatives are messing me up. It seems so easy, but it's kicking my rear.Please help!
Solve the following equations for x, and check your results.
3x-5(3x-7)=2(x+9)+45
Click here to see answer by checkley71(8403) |
Question 39080: Hello!
Can someone help please?
My question is:
If you take $20 from the first and put it into the second of three purses, the second would then contain 4 times as much as remains in the first. If $60 of what is now in the second is put into the third, the third will contain twice what is in the first and second together. Now, if $40 be removed from the third and put into the first, there will be half as much as in the third. What did each purse originally hold?
I know the answer is $50, $100 and $120 but I don't know how to work it out.
Thanks
Marcee
Click here to see answer by Paul(988) |
Question 39477: World grain demand. Freeport McMoRan projects that in 2010 world grain supply will be 1.8 trillion metric tons and the supply will be only 3/4 of world grain demand. What will world grain demand be in 2010?
Click here to see answer by Nate(3500) |
Question 39474: Use an equation, inequality, or fomula to solve this problem.
Living comfortably. Gary has figured that he needs to take home $30,400 a year to live comfortably. If the government get 24% of Gary's income, then what must his income be for him to live comfortably?
Click here to see answer by stanbon(75887) |
Question 39473: Solve each problem.
Layoffs looming. American Products plans to lay off 10% of its employees in its aerospace division and 15% of its employees in its agricultural division. If altogether 12% of the 3000 employees in these two divisions will be laid off, then how many employees are in each division?
Click here to see answer by checkley71(8403) |
Question 39321: How can you solve an equations with one variable and two numbers if they have a neggative and positive signs.It will be oky if you give me an example of how to solve an equation.If it`s not a problem if you could show step by step please and thank you.
Click here to see answer by checkley71(8403) |
Question 39497: Raising rabbits. Before Roland sold two female rabbits, half of his rabbits were female. After the sale, only one-third of his rabbits were female. If x represents his original number of rabbits, then 1/2x - 2 = 1/3(x - 2)
Solve this equation to find the nmber of rabbits that he had before the sale.
Solve each equation for x
x - a = -x + a + 4b
Solve each equation for y
y + 1/2 = -1/3(x + 1/2)
Click here to see answer by Nate(3500) |
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