Tutors Answer Your Questions about Signed-numbers (FREE)
Question 514338: I am using a sample problem for you to help me with so I can get the concept on how to work the problem.
Translate this to a mathematical equation and solve.
A football team gained 13 yards on one play, lost 5 yards on another, and gained 18 yards on the last play of the first half. They had already gained 218 yards during the half. What was the total yardage gain for the first half?
Click here to see answer by stanbon(57290)  |
Question 530055: when solving 3x + 6 = 18, why do you add -6 under the 6 which makes 0 and add -6 under the 18, which makes 12? then it turns out to be 3x = 12, and x = 4. The problem I am having is the signs, why do you use the negative 6?
Click here to see answer by rfer(12657) |
Question 531277: Hello, I am having problems solving this equation. Please assist me in learning. :)
7 - 8r + 3 = 6r - 12 + r
the lone r on the end, is that 1r and do I add 1r to 6r?
I'm confused what do do with that r thats alone
Thank you, Steve
Click here to see answer by stanbon(57290) |
Question 549927: write a rule for the nth term of the arithmetic sequence of the followings:
1. d=4, a14=46
2. d=5/3, a8=24
3. d=-6, a12=-4
4. a5=17, a15=77
5. a2=-28, a20=52
6. d=-4.1, a16=48.2
7. a7=34, a18=122
much help would be appreciated with full works please, not just the answer. thank you very much for ur help and happy new year as well as merry christmas!
Click here to see answer by prateekagrawal(56) |
Question 550787: Direction: use one of the formulas for special series to find the sum of the series.
42
∑ 1
i=1
1. 42 is on top of the symbol, i=1 is on bottom and 1 on right side.
2. 5 on top, n on right, n=1 on bottom. the answer is 15 but how?
3. 18 on top, i=1 on bottom, i on right.
4. 20 on top, k on right, k=1 on bottom
5. 6 on top, n^2 on right, n=1 on bottom.
6. 10 on top, i^2 on right, i=1 on bottom
7. 12 on top, i^2 on right, i=1 on bottom
8. 35 on top, k^2 on right, k=1 on bottom
again all these problems are shown in this symbol: ∑
thanks for ur help and happy new year!
Click here to see answer by solver91311(16877)  |
Question 551562: Short answer: Raise the quantity in parentheses to the indicated exponent, and simply the resulting express. Express answer with positive exponents.
(-16(x^-2)y^3)^2
-----------------
(80x^-2y^3)
Actually it is one parentheses around entire equation on both sides not two at the top not two at the bottom it just one parentheses around entire equation.
Click here to see answer by fcabanski(874) |
Question 553046: I am currently tutoring a student at a local middle school. She had this pre-algebra problem from a test that I believe has a syntax error which makes it difficult to solve. However, I have forgotten the rules that would make this a syntax error for me to explain it to her. This is the equation as written:
(-2)-(-8)/(6+4x(-4)-(-6))=x
I have entered this equation on a spreadsheet program and it will not take the equation as written. It forces the parenthesis in this order:
(-2-(-8)/(6+4*(-4)-(-6)))=x
Why is the first equation incorrect and what are the steps to solve?
Respectfully,
Natalie Witte
Click here to see answer by solver91311(16877) |
Question 556884: write the first six terms of the sequence
2. an=(n+1)^3
4. an=n/n+3
write the next term int he sequence. then write a formula for the nth term.
6.-3,6,-12,24
write the series with summation notation
8. 4+8+12+16
10. 0+3+6+9+12
find the sum of the series (the symbol is sigma)
12. on top of the sigma is 10, bottom is n=4, and on right is n(2n-1)
14. 30 on top, k=1 on bottom, 4 on right
write a rulen for the nth term of the arithmetic sequence
16. 4, 6, 8, 10, 12
18. d=5, a1=13
20. a4=20, a13=65
find the sum of the first n terms of the arithmetic series
22. (-6)+(-2)+2+6+....n=20
write a rule for the nth term of the geometric sequence
26. 6, 12, 24, 48
28. r=3, a1=6
30. a2=50, a6=.005
find the sum of the series (again the symbol is sigma)
32. on top is 10, bottom is i=1, right is 20(0.2)^i-1
34. on top is 8, bottomis i=1, on right is 2(3/5)^i-1
find the sum of the infinite geometric series (the symbol is sigma)
36. on top is symbol of infinity, bottom is n=1, right is 3(3/4)^n-1
38. on top is symbol of infinity, bottom is n=1, right is 4(-0.2)^n-1
find the common ratio of the infinte geoemtric series with the given sum and first term
40. s=2, a1=0.5
42. s=-5, a1=-2
44. s=6, a1=1/3
Click here to see answer by richard1234(5390)  |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125
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