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• Today, 07:25 PM
Make it equal to u: -2e^-x = u 1st step: -2/(e^x) = u Do you understand that?
3 replies | 64 view(s)
• Today, 04:20 PM
46,204.09 is CORRECT. Next, simply calculate FV of the 50,000: 50000(1+.06/12)^240 Add result to 46,204.09 and you're done. Make SURE you...
3 replies | 48 view(s)
• Yesterday, 07:52 PM
Your "4 hours" should be 8 hours: author specified 4 times longer. 1 7/8 is correct. Good news: you'd be correct IF 4 hours :rolleyes:
4 replies | 86 view(s)
• Yesterday, 07:38 PM
Let u = x*F Then G/u = H u = G/H : get my drift?
5 replies | 120 view(s)
• Yesterday, 05:26 PM
Jay, are you able to solve the equation 3x^2+16x+20 = 0 using the quadratic formula?
21 replies | 280 view(s)
• 04-21-2018, 10:01 AM
Ever heard of "Present value of an annuity"? Anyhow, at 2.58 APR, borrow max. even if you don't need it :p
2 replies | 162 view(s)
• 04-21-2018, 09:55 AM
Hint: if you borrow $B and pay back total of$P to pay it off, what does P - B represent? Get it?
2 replies | 63 view(s)
• 04-20-2018, 06:20 PM
Ah so!!:lol:
10 replies | 262 view(s)
• 04-20-2018, 01:50 PM
3 replies | 92 view(s)
• 04-19-2018, 10:38 PM
Denis replied to a thread Denis Is Jealous in Math Odds & Ends
11 replies | 356 view(s)
• 04-19-2018, 08:02 PM
Divide 1st equation by 6: a + b = 5 So a = 5 - b Substitute in 2nd equation: 3(5 - b) + 2b = 14 Solve that and you're finished!
10 replies | 262 view(s)
• 04-18-2018, 10:20 PM
Jomo oh Jomo yo my zero, whoops hero !!
11 replies | 302 view(s)
• 04-18-2018, 06:59 PM
Ya made zee typo Halls... aNUTter way: x^2 + y^2 = 5 y - x = 3 ^2 : x^2 - 2xy + y^2 = 9 Subtract from : xy = -2
11 replies | 302 view(s)
• 04-18-2018, 12:23 PM
WHY do you say it's "wrong"? Havva look: http://www.wolframalpha.com/input/?i=log(10)%5E5%2Flog(10)%5E2%3Dlog(10)%5Ex
7 replies | 160 view(s)
• 04-18-2018, 12:13 PM
Did you make that up? If not, is it the original problem IN FULL? What do you mean with "simultaneous quadratic equations"? After substituting (as...
11 replies | 302 view(s)
• 04-18-2018, 12:00 PM
http://mathonweb.com/help_ebook/html/equations_1.htm
6 replies | 153 view(s)
• 04-18-2018, 09:53 AM
VERY good idea :rolleyes:
6 replies | 153 view(s)
• 04-16-2018, 10:09 PM
Yer correct Doc: should be the parallel sides. He made same goof here (but corrected it):...
3 replies | 131 view(s)
• 04-16-2018, 06:35 PM
1st one looks like: B = A - 3 A = B/2 + 6 No idea about the 2nd; seems that number 1201 is involved...
4 replies | 174 view(s)
• 04-16-2018, 06:12 PM
Betya a Canuk Toonie answer is 921.375:rolleyes:
5 replies | 396 view(s)
• 04-15-2018, 07:43 PM
1950*.081/360*30 would be the monthly payment (if such is the arrangement) which means 1950 would still be due after 70th payment. "We went over...
5 replies | 396 view(s)
• 04-15-2018, 01:19 PM
Agree...but this one is "close": 11 / 14 = .7857142.... pi * 14 / 56 = .7853981.... Just another "badly written problem":confused:
5 replies | 158 view(s)
• 04-15-2018, 12:32 PM
A simple diagram = 1000 words! p = plane speed, w = wind speed (@p-w)..............876...............>2 hr : clearly p-w = 876/2 1.5...
3 replies | 134 view(s)
• 04-15-2018, 12:08 PM
Are you serious?! This is not a "we do homework" site. Is your teacher aware that you're doing this?
2 replies | 102 view(s)
• 04-15-2018, 12:03 PM
Hint: n(n+1)/2 In that sequence, n = 5 5(5 + 1) / 2 = 15
4 replies | 303 view(s)
• 04-14-2018, 01:57 PM
x = 3 + 5 + 9 x = ? 3 + 5 = 8 x = 8 + 9 x = 17 Get my drift? :p
5 replies | 180 view(s)
• 04-14-2018, 12:40 PM
7 21 63 189 : sum = 280 a = 1st term = 7 r = ratio = 3 n = number of terms = 4 sum = a(r^n - 1) / (r - 1) = 280 HOKAY?
9 replies | 304 view(s)
• 04-13-2018, 08:02 PM
Work what out? 2,6,18,54,162 is also a geometric sequence.
9 replies | 304 view(s)
• 04-13-2018, 07:52 PM
Denis replied to a thread Denis Is Jealous in Math Odds & Ends
Her autograph, of course...
11 replies | 356 view(s)
• 04-13-2018, 03:57 PM
Hint: S = 15 - L
3 replies | 116 view(s)
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