Tutors Answer Your Questions about Systems-of-equations (FREE)
Question 450815: I need to write a system of equation and solve it.one of my questions i dont understand it  I very much appreciate your help and all your hard work put into answering this question.
what i know how to do is define my variables.
x=Sally's Age
y=Adam's Age
Or if you like the other way around.
once again i appreciate your hard work. thank you.
Click here to see answer by ankor@dixie-net.com(15664)   |
Question 452272: A cyclist can ride from A to B and back in a certain time at an average rate of 10 km an hour. If he were to ride from A to B at 9km an hour, vand return at 12km an hour, he would save 15 minutes on the double journey. Find the distance from a to B.
A man buys apples at $6 a dozen, and twice as many at $9 a score; he sells them at $9 a dozen, and make a profit of $102. How many apples does he buy?
A man bought a number of eggs at four for $1, and four times as many at five for $1.50; he sells them at a penny each, and make a profit of $44. How many eggs does he buy?
I want the equation of these question(no solution is OK), please~~ in hurry
Click here to see answer by ankor@dixie-net.com(15664) |
Question 461541: this is a word problem....a certain amount of money saved for 1 year at a certain interest rate yielded $7.50. If the principal had been $25 more and the interest rate 1% less, the interest would have been the same. find the principal and the rate.
Click here to see answer by robertb(4012)  |
Question 462338: 1. Each year, I plant a fruit/vegetable garden in the spring. I grow a variety of things, but my BIG plantings are of tomatoes and peppers. However, getting my seeds to sprout is not as easy as you’d think….
A. This year, I seeded both peppers and tomatoes, using a total of 120 seeds. Write an equation to show this.
Using P for peppers and T for tomoatoes the equation would look like:
P+T=120
B. I sowed nine times as many tomato seeds as pepper seeds. Write an equation to show this.
9T+P=120
C. How many tomato seeds did I plant?
D. How many pepper seeds did I plant?
I really do not want the answer I just want to know if I am on the right track as far as my equations go. I tried to solve using the substitution method but I keep coming up with T=0 and P=120 which I know can't be right, right?
Click here to see answer by amoresroy(333)  |
Question 463202: (Bulk candies)
A grocery store sells certain candies in bulk. The good and plenty cost $2.49 per pound and sweet treats $2.89 per pound. If Jane stranger takes 3 scoops of good and plenty and mixes with it 5 scoops of sweet treat, how much per pound should the mixture sell for? Assume each scoop contained the same weight of candy.
Click here to see answer by edjones(7569)  |
Question 463648: Let me try to solve your system of equation 4x + 4y = 16 and 2x + y = 10 using the elimination method.
•Multiply the equation 2x + y = 10 by -2; -4x - 2y = -10.
•Add the equation 4x + 4y = 16 and the equation -4x - 2y = -10 together; 2y = 6.
•Isolate the variable y by dividing both sides of the equation by 2; y = 3.
Can anyone tell us why I multiplied the equation 2x + y = 10 by -2?
is this correct so far? please help!!
Click here to see answer by Alan3354(30993)  |
Question 466162: kayla gets paid $6.00 for raking leaves and $8.00 for mowing each lawn of the neighbors around her subdivision. This year she moved the lawns 12 times more than she raked leaves. In total, she made $918.00 for doing both. How many times did she rake the leaves.
Click here to see answer by stanbon(57415) |
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