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Tutors Answer Your Questions about Expressions-with-variables (FREE)
Question 37349: Please help..how do i work this problem. I have to factor the numerator and denominator as completely as possible, then divide out all the like factors (one for one) in numerator and denominator.
25x
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10x + 15
Please show me the details of getting the answer so i may understand how it is done.
Thank you,
Sean
Click here to see answer by AnlytcPhil(958)   |
Question 37396: Is there a formula that could be used to explain how you add consecutive numbers to make multiples of 100.eg.18+19=19=20=21=22=100 38+39+40+41+42=200 that would be suitable for a twelve year old to be able to solve such problems?
Click here to see answer by checkley71(8405) |
Question 37342: Lisa Chen invested $24,000, part of it at 8% and the rest at 7.2%. How much did she invest at each rate if her income from the 8% investment is 2/3 that of the 7% investment?
This is a multiple choice question so by inserting different answers I was able to figure out that the answers are $15,000 at 7.2% and $9,000 at 8%. I still don't know how to do the problem though. Please help me with this one. Thanks!!
Click here to see answer by checkley71(8405) |
Question 37309This question is from textbook Elementary and intermediate Algebra
: help me with the substitution method word problems.
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Mrs. brighton invested $30,000 and received $2300.00 in interest. If she invested part of the money at 10% and the remainder at 5%, then how much did she invest at each rate ?
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tickets for a concert we're sold to adults for $3.00 and to students at $2.00. If the total receipts we're $824.00 and twice as many adult tickets as student tickets we're sold, then how many of each we're sold ?This question is from textbook Elementary and intermediate Algebra
Click here to see answer by checkley71(8405) |
Question 37589: Can someone help me with these questions please?
A principal of $5000 was invested in a savings account for 4 years. If the interest earned for the period was $400, what was the interest rate?
Allen bought 20 stamps at the post office in 37¢ and 20¢ denominations. If the total cost of the stamps was $7.06, how many 37¢ stamps did Allen buy?
The perimeter of a rectangle is to be no greater than 300 in., and the length must be 125 in. Find the maximum width of the rectangle.
One number is 8 less than another. If 5 times the smaller number minus 2 times the larger number is 14, find the two numbers.
Click here to see answer by Nate(3495) |
Question 37628: Here is a word problem that involves the vertical motion formula of h=-16t^2 + vt +s. The problem is if a person on a creek bed throws a rock straight up at a speed of 64 feet per second. 1) when will the rock reach a maximum height? 2) when will the rock hit the water again?
This is how I have satrted: I used the formula by putting 64 in the v spot and 0 in the s spot because I started at 0. It looks like this
h=-16t^2 + 64t +0. I worked it out and got 2(1+-1) =t so my answer would be
t=0 and t=4 If that is right then would the answer to #1 be half of that which is 2 seconds and the answer to #2 would be 4 seconds when it hits the water again. Am I on the right path or am I totally off?
Click here to see answer by Earlsdon(4898) |
Question 37002: x+2y=5
3x-15= -6y
I'm trying to solve this by elmination or substitution method, or is it no solution?
I've tried:
6y+3x=-15
2y+x=5
3(2y+x)=5
6y+3x=-15
6y+3x=15
0=15
but my y and x expressions will cancel out and i'm left with no solution
Click here to see answer by ilana(236) |
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