Search: Statistics 15.42

Number of results: 42,814

Algebra
a = age of the twins b = age of the third child b = a - 3 a + a + b = 42 2 a + b = 42 2 a + a - 3 = 42 3 a - 3 = 42 3 a = 42 + 3 3 a = 45 Divide both sides by 3 a = 45 / 3 a = 15 b = 15 - 3 b = 12
Tuesday, February 14, 2012 at 12:47am by Bosnian

Physics
Not quite. Since it goes around 15 times in 42 seconds, you need to multiply (2pi*r)/T by 15 if T = 42 s.
Tuesday, March 13, 2012 at 12:10am by drwls

algebra
42 + 2•7 – (5 • 4 – 15) = 42 + 14 - (20-15) = 56 - 5 = 51
Sunday, July 20, 2008 at 7:17pm by Reiny

chem
Your numbers look ok to me. You just didn't solve for V2 correctly. If I solve for V2, I get [1(4)*273.15]=1.42*303.15*V2 and V2 = [(1*4*273.15)/(303.15*1.42)]=?? I might disagree just a little over the conversion of Pa to atm. I would have written 145,000/101325 = 1.4310 ...
Sunday, March 30, 2008 at 7:27pm by DrBob222

Physics
First you must change 56 km/h to m/s. In m/s the Initial Velocity is 15.56 m/s. Next use the equation: S = ViT + (1/2)at^2 and solve for a 21 = (15.56)(2.17) + (1/2)(a)(2.17)^2 a = -5.42 m/s^2 Now that you have the acceleration you can solve for the final velocity using either...
Wednesday, September 2, 2009 at 11:44pm by Ryan

statistics
I would not use Excel. Just use the formula for a Poisson distribution... once. The carpet has 126 square feet and the probability of flaws per square foot is p = 1/300. If m is the number of flaws, the probability of m flaws in n = 126 square feet is given by the Poisson ...
Wednesday, April 15, 2009 at 7:24pm by drwls

Math
6x7 = 42 3x14 = 42 1x42=42 7+7+7+7+7+7= 42 14 +14 +14 =42 1 + 1 + 1 + ... + 1 + 1 =42 , with 42 of those 1's Don't really know what you want here.... They had me "memorize" that 6 x 7 = 42 about 68 years ago, and guess what, I still know that.
Sunday, January 13, 2013 at 7:21pm by Reiny

math
5/7 - 1/2(1/3+3/7) = 5/7 - 1/6 + 3/14 = 30/42 - 7/42 + 9/42 = 39/42 - 7/42 = 32/42 = 16/21.
Monday, September 19, 2011 at 6:27pm by Henry

statistics
The following data lists the average monthly snowfall for January in 15 cities around the US: 37 33 35 27 9 45 22 8 42 48 37 39 9 15 12 Find the mean, variance, and standard deviation
Sunday, May 15, 2011 at 7:47pm by kate

Elementary Statistics
42/(39+42)= 51.85%
Wednesday, June 8, 2011 at 7:29pm by Ashley

statistics
It is just like picking 4 people without replacement. P(0) = 28/43 * 27/42 * 26/41 * 25/40 = ? P(1) = 15/43 * 28/42 * 27/41 * 26/40 = ? Use a similar process for the remaining two probabilities.
Saturday, July 9, 2011 at 8:19pm by PsyDAG

statistics
p(A) = .42 1-p(A) = .58 n = 4 for n = 4, binomial coefs are 1 4 6 4 1 P(y=0) = 1*.42^0*.58^4 P(y=1) = 4*.42^1*.58^3 P(y=2) = 6*.42^2*.58^2
Tuesday, February 5, 2008 at 7:32pm by Damon

math
1/7 = 6/42 1/6 = 7/42 6/42 + 7/42 = 13/42 42/42 = 13/42 = 29/42
Wednesday, February 1, 2012 at 8:53pm by Ms. Sue

Fractionsz
Online "*" is used to indicate multiplication, because "x" is often used to indicate an unknown. 8 2/5 * 15 = 42/5 *15 = 42 * 3 = 126
Friday, September 23, 2011 at 3:28pm by PsyDAG

math
5/7 * 3/6 = First multiply the top numbers: 5 * 3 = 15 Then multiply the bottom numbers: 7 * 6 = 42. 5/7 * 3/6 = 15/42 = 5/14
Wednesday, June 25, 2008 at 3:03pm by Ms. Sue

Chemistry
estimate: that is over 2 half lives, guessing 20 percent. The math amountremaining=original*e^(-ln2*15/6.42) decimal percent=e^(-ln2*15/6.42)=.199 or 19.9 percent
Sunday, January 6, 2013 at 2:27pm by bobpursley

Statistics
3. A professor is interested in whether there is a difference in counseling students’ statistics competency scores among 1) those who have never taken any statistics course, 2) those who have only taken an undergraduate statistics course, 3) those who have taken COUN 503...
Sunday, December 9, 2012 at 10:25am by Ke Ke

algebra
2/5x+1/3=3 2/15 2/5x = 3 2/15 - 1/3 2/5x = 3 2/15 - 5/15 2/5x = 2 17/15 - 5/15 2/5x = 2 12/15 x = (2 12/15) / 2/5 x = (42/15) * (5/2) x = 210/30 x = ?
Saturday, September 18, 2010 at 7:47pm by Ms. Sue

physics
Assume that positive x-axis directed to the right (a)(b) v=vₒ+at t=( v-vₒ)/a=(10.4-5.2)/3.65=1.42 s displacement = distance= vₒt+at²/2=5.2•1.42+3.65•1.42²/2= 7.384+3.68 =11.064 m (from origin point - to theright) (c) v...
Thursday, August 30, 2012 at 12:29am by Elena

statistics
A machine used for packaging seedless golden raisins is set so that their standard deviation in the weight of raisins packaged per box is 0.25 ounce. The operations manager wishes to test the machine setting and selects a sample of 30 consecutive raisin packages filled during ...
Saturday, October 3, 2009 at 10:50am by MBAhopeful

statistics
F ratio = (30/2)/(60/15) = 15/4 = 3.75
Wednesday, November 14, 2012 at 5:14pm by RD Statistics

math
4/3 + 2 x = 62/15 2 x = 62/15 - 20/15 2 x = 42/15 x = 21/15 = 7/5 = 1 2/5
Friday, December 16, 2011 at 2:08am by Damon

approximation fractions
One way to answer would be to convert to common denominators. 10/21 = 40/84 15/28 = 45/84 so 15/28 is quite a bit larger. Here is another way: 10/21 is 0.5/21 or 1/42 larger than 1/2 15/28 is 1/28 larger than 1/2. Since 1/28 > 1/42, 15/28 is larger
Friday, January 7, 2011 at 8:16am by drwls

math
yes so 42/15 - 45/15 = -3/15 = -1/5
Wednesday, October 27, 2010 at 8:44pm by Damon

calculus
If f(x)=x^3+5x then f(3)=27+15=42, f(6)=216+36=252 and slope=(252-42)/(6-3)
Thursday, September 1, 2011 at 7:32pm by Mgraph

Physics
When you compute di/do, you have to use the do, di pairs that go together. You should not be getting negative values for do. 1/do + 1/(42-do) = 1/7 (42 - do + do)/[do(42-do)] = 1/7 do(42-do)= 7*42 = 294 do^2 -42do +294 = 0 do = (1/2)[42 +/- sqrt588] = 33.1 or 8.87 di = 8.9 ...
Sunday, March 22, 2009 at 9:58pm by drwls

4th grade
This is not usually 4th grade. change fractions to have all the same denominator: 42 6/42; 35/42; 1/42; 11/42 Now it is much easier to sort them
Wednesday, January 6, 2010 at 7:41pm by bobpursley

math
42,400*(1.041)^15 = 42,400*1.8271 = 77,469
Wednesday, August 1, 2012 at 9:52pm by drwls

Calculus
v = 42 - 7 t when does v = 0? t = 42/7 x = (1/2) a t^2 = (7/2)(42^2/49) = 42^2/14 = 126 feet
Thursday, April 26, 2012 at 6:53pm by Damon

Math- Corrections
(-9)-4w+7w=42 (-9)-11w=42 -4w+7w = +3w. You don't change the sign of the 7w unless you move it to the other side. +11w +11w (-9)=42+11w -42 -42 (-9)-42 (-9)+(-42) 11w=(-51) /11 /11 w= 4.636363636363...... The answer is, indeed, 17.
Monday, November 5, 2007 at 4:20pm by DrBob222

Math- Corrections
(-9)-4w+7w=42 (-9)-(-4)+7w=42 (-9)-3w=42 +3w +3w (-9)=42+3w -42 -42 (-9)-42 (-9)+(-42) 3w= -51 /3w /3w w= -17 I got -17. How is this possible?
Monday, November 5, 2007 at 4:20pm by Chris

Pre- Algebra
I am going to assume that you mean: (-1/7) g + (5/6) g = 9 (-6/42) g + (35/42) g = 9 (29/42)g = 9 29 g = 9*42 g = 9*42/29
Saturday, January 12, 2008 at 3:01pm by Damon

arithmetic progression
Let d = the common difference t(n)=nth term t(6)-t(5)=d t(5)-t(4)=d t(4)-t(3)=d Add t(6)-t(3)=3d or 3d=12 Solve for the common difference d=4 Sum of the 2nd and 5th terms = 42 t(2)+t(5) =t(2)+(t(2)+3d) =2*t(2)+12 = 42 Solve for t(2) = 15 t(1) should be t(2)-1=15-4=11 and t(20...
Friday, November 26, 2010 at 5:41am by MathMate

Math- Corrections
No, you wrote a -3w where I have placed the asterisks. You made another error also, You placed a - sign in front of a -4. You should not have done that.I have placed a # mark there. (-9)-4w+7w=42 (-9)-##(-4)+7w=42 (-9)-3w***=42 +3w +3w (-9)=42+3w -42 -42 (-9)-42 (-9)+(-42) (-9...
Monday, November 5, 2007 at 4:20pm by DrBob222

Arithmetic Progression
"the 6th term is half the 4th term" ---> a+5d = (1/2)(a+3d) 2a + 10d = a + 3d a + 7d = 0 "the 3rd term is 15. " ---> a + 2d = 15 subtract those two equations ... 5d = -15 d = -3 sub into a+ 2d = 15 ---> a - 6 = 15 a = 21 a = 21 , b = -3...
Monday, September 17, 2012 at 2:49am by Reiny

Physics
t1 + t2 = 90 15,800 ft = acceleration distance + coasting distance (1/2)*42*t1^2 + (42*t1)*t2 = 15800 Solve those two equations in the two unknowns, t1 and t2. The substitution method should work. (b) V = 42 * t1 (after acceleration) Use the value of t1 derived in part (a) to ...
Friday, January 22, 2010 at 12:21am by drwls

math
x = The number of sweets in container x y = The number of sweets in Container y x = 24 + y OR y = x - 24 When you removed 42 sweets from container x then numers of sweets in container x became: x - 42 Numbers of sweets in container y became: y + 42 = thrice of ( x - 42 ) = 3...
Monday, February 13, 2012 at 6:20am by Bosnian

Math
14 ft * 4 yds * 3 ft/yd = 168 ft^2 each tile = 2*2 = 4 ft^2 168/4 = 42 tiles 5 tiles cost 4*5 = $20 42/5 = 8 + 2/5 so 20*8 + 2*5 = 160+10 = $ 170 42/15 = 2.8 so he can buy 3 whole boxes for 3*30 = $90 big saving He would have three left over then, tough.
Monday, March 3, 2008 at 6:29pm by Damon

Statistics 15.42
To quote one of our very good math and science tutors: “You will find here at Jiskha that long series of questions, posted with no evidence of effort or thought by the person posting, will not be answered. We will gladly respond to your future questions in which your ...
Wednesday, June 16, 2010 at 12:13am by Writeacher

math
yes, that's right. :) then (42-45)/15 = -3/15 = -1/5
Wednesday, October 27, 2010 at 8:44pm by jai

statistics
5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and statistics? Using a web-calculator, obtain the ...
Tuesday, November 29, 2011 at 12:12am by shirley

Statistics
Let's set up the null and alternative hypothesis, find a formula to use, then go from there. Null hypothesis: Ho: p = .42 -->meaning: population proportion is equal to .42 Alternative hypothesis: Ha: p > .42 -->meaning: population proportion is greater...
Monday, October 29, 2007 at 3:54pm by MathGuru

statistics
You can use the binomial distribution: P = nCs*p^s*(1-p)^n(-s) where P is the probability we are hanting for, n = 15 is the size of a sample, s is the number of registered voters of 15 people, and p = 0.3 (30%) is the proportion of registered voters in the area. a) P(3 of 15...
Wednesday, December 5, 2012 at 4:40pm by Gene

statistics
At a ski area in Vermont, the daytime high temperature is normally distributed during January, with a mean of 22°F and a standard deviation of 10°F. You are planning to snowboard there this January. What is the probability that you will encounter daytime highs of a) 42...
Thursday, April 29, 2010 at 10:32am by john

Math
I was to find the sum or difference of each problem: A) 15.6 + 8.305 + 0.4= 24.305 B) 14/3 - 16/5= 20/15 - 18/15= 2/15 C) 20.096 - 42.3 = -22.204 D) -3 1/8 + 4 5/6 = -25/8 + 29/6= -150/48 + 232/48= 82/48. Is this correct?
Monday, July 6, 2009 at 11:11pm by B.B.

math
Let j = Judy's animals j + j + 12 = 42 2j = 42 - 12 2j = 30 j = 15
Wednesday, February 29, 2012 at 5:26pm by Ms. Sue

Math- Corrections
(-9)-4w+7w=42 I thought I knew how to do this, but my teacher said i was wrong. This what I thought: (-9)-4w+7w=42 (-9)-11w=42 +11w +11w (-9)=42+11w -42 -42 (-9)-42 (-9)+(-42) 11w=(-51) /11 /11 w= 4.636363636363...... She told us that the correct answer is 17, but I could not ...
Monday, November 5, 2007 at 4:20pm by Chris

statistics
I am not understanding this last portion of my statistics class. I am completely confused about critical values. Please help me. Thank you!! What critical value for z would be used to test the hypotheses: H_0:μ≥15 and H_a:μ<15, for a = 0.01 ?
Monday, August 1, 2011 at 7:36pm by Celest

Math
The tax on $34.61 is $2.42. $34.61 + 2.42 = $37.03 = total owed restaurant $37.03 * 0.15 = $5.55 tip Total spent: $37.04 + 5.55 = $42.59
Friday, July 25, 2008 at 11:39am by Ms. Sue

math
42 % = 42 / 100 40 = x * 42 / 100 Multiply both sides by 100 40 * 100 = 42 x 4000 = 42 x Divide both sides by 42 4000 / 42 = x x = 95.238 OR 42 % = 42 / 100 = 0.42 x = 40 / 0.42 = 95.238
Wednesday, March 6, 2013 at 10:20pm by Bosnian

statistics
Build a 95% confidence interval for the mean of the population from the given sample data. Assume that the population has a normal distribution. 16.4, 15.7, 16.2, 15.8 17.1 15.8, 15.9, 16.0, 16.4 15.0
Wednesday, June 22, 2011 at 8:14pm by Jessica

statistics
Use a proportional confidence interval formula: CI95 = p + or - (1.96)(√pq/n) Note: + or - 1.96 represents 95% confidence interval. For p in your problem: .42 For q: 1 - p = 1 - .42 = .58 n = 1500 I let you take it from here to calculate the interval.
Monday, March 25, 2013 at 10:46pm by MathGuru

statistics
Hope this helps: Mean 42.625 Standard Error 1.37196635 Median 42 Mode 41 Standard Deviation 5.487865402 Sample Variance 30.11666667 Kurtosis -0.413446348 Skewness 0.110205125 Range 19 Minimum 33 Maximum 52 Sum 682 Count 16 Confidence Level(99.0%) 4.04279092 This is really easy...
Wednesday, November 21, 2012 at 2:42pm by Colton

math help
6-6(3x - 1)= -42 6 - 18x + 6 = -42 -18x = -42 x = 42/18 x = 2.33333
Sunday, December 20, 2009 at 9:05pm by Ms. Sue

statistics
42
Friday, September 10, 2010 at 1:37pm by mary

Statistics
a) 5-15 b) 15-20 c) 15-year-olds
Monday, February 25, 2013 at 3:27am by hack

statistics
60/400 = 0.15 0.15*100 = 15%
Saturday, January 19, 2013 at 9:36pm by Gabby

Statistics - math
1-(3/4)^15-C(15,1)(1/4)(3/4)^14 -C(15,2)(1/4)^2(3/4)^13
Tuesday, October 2, 2012 at 5:33pm by Shelly

math
the next three terms are 70,87,106. the pattern is adding consecutive odd numbers to each term. ex: 15+7=22, 22+9=31, 31+11=42, 42+13=55 and so on.
Wednesday, November 10, 2010 at 1:11am by Rose

statistics
The following data lists the average monthly snowfall for January in 15 cities around the US: 38 0 47 32 42 31 40 47 35 43 36 17 36 8 1 Find the mean, variance, and standard deviation. Please show all of your work.
Sunday, November 18, 2012 at 4:51pm by Huffette

Statistics
The confidence interval below for the population variance is based on the following sample statistics: n = 25, x-bar = 31.1, and s = 4.2. 9.29 < standard deviation squared < 42.82 What is the degree of confidence?
Sunday, July 22, 2012 at 6:52pm by Ann

Science
Working on the Amazon River, a biologist isolated DNA from two unknown organisms, P and Q. He discovered that the adenine content of P was 15% and the cytosine content of Q was 42%. This means that: a) the amount of guanine in P is 15% b) the amount of guanine and cytosine ...
Tuesday, October 26, 2010 at 12:16pm by May

direct variation
could someone please help me with these problems i am having trouble. If y=36 when x =6 find x when y = 42 If y=-18 when x=6 find x when y=6 If y =12 when x= 15 find x when y =21 If y=-6.6 when x=9.9 find y when x =6.6 If y=6 when x=(2/3)find x when y=12 those are the ...
Wednesday, September 13, 2006 at 8:40pm by Teri

Algebra
since An = A1 + (n-1)d, 42 = 4+(n-1)*2 n=20 So, A20 = 42 This must have a typo, since you can't get to -36 with a positive difference between terms. Assuming you meant d = -2.1, -36 = -.3 + (n-1)(-2.1) A18 = -36 Apparently d = 1/24 9/8 = 1/12 + (n-1)(1/12) A26 = 9/8 15 &...
Monday, April 8, 2013 at 1:04pm by Steve

Math
First you subtract 172.41 from 15.99 b/c you want to know how many miles he drove without the fee first which I came up with 156.42. So I'm assuming that he drove 198 miles. To check your answer 198 x.79=156.42 + 15.99=172.41
Wednesday, August 12, 2009 at 1:44am by Janie

Math
1 ) The domain of a function is the set of all possible input values , which allows the function formula to work. The denominator of any fraction cannot have the value zero. I this case : x + 3 must be different of zero x different of - 3 Domain: ( - infinity , - 3 ) U ( - 3...
Sunday, May 13, 2012 at 10:41am by Bosnian

math
Ratio = 2:5? P = 42 cm. X cm = Long side. 2x/5 cm = Short side. 2x + 2*2x/5 = 42 cm. 10x + 4x = 210 14x = 210 X = 15 cm. 2x/5 = 2*15/5 = 6 cm.
Wednesday, April 3, 2013 at 1:09pm by Henry

Statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 6/15 * 4/15 * 5/15 = ? Without replacement, there is one less ball total in the following draws. 6/15 * 4/14 * 5/13 = ?
Sunday, January 20, 2013 at 5:06am by PsyDAG

math
Since probability is a value between zero and 1, you should have realized immediately that your answer made no sense. prob of 2 black balls = 8/15 * 7/14 = 56/210 prob of 2 red balls = 7/15 * 6/15 = 42/210 so the prob of either 2 black OR 2 red balls = 98/210 = 7/15 (notice ...
Monday, January 19, 2009 at 9:08pm by Reiny

statistics
=POISSON(0,0.42,FALSE)
Wednesday, April 15, 2009 at 7:24pm by Marlon

Math
Change to common denominator. 4 35/42 - 3 18/42 = 1 17/42
Wednesday, December 19, 2012 at 11:06pm by PsyDAG

math
I forgot how to add and subtract mixed # fractions. How do you do it? ex) 3/7+5/6=1 11/42- How did they get this answer?? ex) 5 6/13-2 8/13=2 11/13- How did they get this answer?? ex) 3/7+5/6=1 11/42 You need to find a common denominator when adding or subtracting fractions. 3...
Tuesday, June 26, 2007 at 6:46pm by Mack

Math
okay so I found the common denominator to be 42. So I think now I do 7t/42-3t/42=1/6.. is that right?
Tuesday, August 3, 2010 at 10:09am by Bailey

math
write as an addition problem (-21)-42 A) (-21)-(-42) B) (-21)+42 c) (-21)+(-42) D) none of the above I thought it would be c. Is this correct?
Tuesday, November 9, 2010 at 11:03am by m

Algebra
Let x = # of nickels, y = # of dimes x + y = 42 y = 42 - x 5x + 10y = 385 Substitute 42 - x for y. 5x + 10(42-x) = 385 Solve for x.
Wednesday, August 4, 2010 at 11:39pm by PsyDAG

statistics
I don't know what "Cp" and "Cpk" mean. It would help to spell out these concepts. However, Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions ...
Sunday, December 2, 2012 at 11:01am by PsyDAG

Physics
After flying for 15 min in a wind blowing 42 km/h at an angle of 28° south of east, an airplane pilot is over a town that is 42 km due north of the starting point. What is the speed of the airplane relative to the air?
Tuesday, February 5, 2013 at 5:35pm by Patricia

physics
After flying for 15 min in a wind blowing 42 km/h at an angle of 20° south of east, an airplane pilot is over a town that is 42 km due north of the starting point. What is the speed of the airplane relative to the air?
Thursday, September 17, 2009 at 10:55pm by Nick

Math
Write the fraction in simplest form. 14. 18/48 15. 42/81 16. 32a / 8a squared 17. 15 b / 39b ( little 4)
Thursday, November 15, 2012 at 3:48pm by Tiffany

statistics
1. Prob(pain caused by w.t.m.) = .8 prob(pain not caused by w.t.m.) = .2 so prob(exactly 10 caused by w.t.m.) = C(15,10)(.8^10)(.2^5) = .10318 2. lots of calculations here, more than 8 means exactly 9 + exactly 10 + exactly 11 + ...+ exactly 15 = C(15,9)(.8^9)(.2^6) + C(15,10...
Monday, November 23, 2009 at 5:03pm by Reiny

statistics
42.38 0.0035 - 0.045
Monday, January 14, 2013 at 6:26pm by asif

STATISTICS
WHAT IS THE MEANING OF X~N(42,5,103.71)
Friday, June 29, 2012 at 5:00am by JUSTUS

statistics
.43(.33) + .57(.42) = ?
Thursday, February 10, 2011 at 7:19pm by PsyDAG

math
Oh, puhleeze. Try dividing 42 by each of them and see what you get. If you get an integer answer, then 42 is evenly divisible by that divisor. Hint: 42/14 = 3
Saturday, January 9, 2010 at 3:56pm by drwls

math
42 - 27 = 15 15/27 = 0.55555 = 56 percent bigger
Thursday, December 9, 2010 at 6:28pm by Ms. Sue

Statistics
Try a one-sample z-test. Hypotheses: Ho: µ = 42 -->null hypothesis Ha: µ < 42 -->alternate hypothesis z = (sample mean - population mean)/(standard deviation divided by the square root of the sample size) With your data: z = (40.2 - 42)/(5/&...
Wednesday, April 4, 2012 at 5:22pm by MathGuru

Math
15 letters formed with straight lines. 36 different slips. p = 15/36 or .416 - 42% rounded.
Wednesday, November 4, 2009 at 6:18pm by rustypelican

math
2 4/5 - 3 so 3 becomes 3/1 right? Then change 2 4/5 to 14/5 = 42/15 and 3/1 = 45/15 right?
Wednesday, October 27, 2010 at 8:44pm by Anonymous

statistics
The critical value of F1 = F (0.05, 2, 15) = 3.68 and F2 =F (0.01, 2, 15) = 6.35. As F = 4.10 > F1 but < F2, Reject the null hypothesis with á = .05 but not with á = .01. (a) is the correct choice.
Wednesday, November 14, 2012 at 5:16pm by RD Statistics

Intermediate algebra
7(6-2x) = x -1 42 - 14 x = x -1 15 x = 43 x = 43/15
Sunday, May 25, 2008 at 11:02am by drwls

math
-8a+6(a+7)=1 -8a + 6a + 42 = 1 -2a + 42 - 42 = 1 - 42 -2a = -41 a = 20.5 Proof: -8(20.5) + 6(20.5 + 7) = 1 -164 + 123 + 42 = 1 165 - 164 = 1
Thursday, May 29, 2008 at 5:55pm by Ms. Sue

Statistics
x=3-0 . What percentage of the area under the normal curve lies to the left of ( 16.0% 15.80% 2.50% 0.50% having trouble with this my answer was 15.00% 0.15%
Sunday, June 20, 2010 at 11:08am by Jack

Trigonometry
You could always punch in 1/3 + 83 sin to get sin of 83 1/3 degrees. Or, just get sin 83.333333333 degrees. It should be close enough. So, assuming you can in fact evaluate your sines, just use the fact that A+B+C = 180° so, B = 180° - 83°20' - 54°36'...
Thursday, December 8, 2011 at 5:01pm by Steve

math
a1=5.5*2.5 =13.25 cm2 a2=5.3*8 =42.4cm2 a3=2.5*8/2 =10 then times by 2 cause to right triangles =20cm2 a4=8.38*5.3 =44.42 at=13.25+42.4+44.42+20 =120.11cm2
Sunday, November 11, 2007 at 9:56pm by mohameed

Math: Algebra
the distance is the same Let s be his uphill speed d/s = 6 d/(s+2.5) = .75 6s = .75(s+2.5) 6s = 3s/4 + 15/8 48s = 6s + 15 42s = 15 s = 15/42 = 5/14 So, he can go up at 5/14 mph and come down at 20/7 mph 6*5/14 = 30/14 3/4 * 20/7 = 60/28 = 30/14 Looks like the hill is 15/7 ...
Wednesday, February 1, 2012 at 1:38pm by Steve

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