Friday
April 24, 2015

Posts by STEVE


Total # Posts: 30,765

mathematics
10-8 < x < 10+8
April 24, 2015

Algebra
The subject says algebra, but since you apparently have had some trig, just use the law of cosines: x^2 = 165^2 + 245^2 - 2(165)(245)cos115°
April 24, 2015

Algebra
the first leg moves the plane in th x- and y-directions by (165*cos40°,-165*sin40°) Now figure the amounts of the second leg, add them up, and then use the distance formula.
April 24, 2015

math
4 red,4 white,4 blue at random take out 2 , say 1 red 1 white do not replace. what is probarbility of now picking a)blue b)red c)white so red=1/12 or 1/4 white=1/12 or 1/4 now only 10 left red 3/10,white3/10, blue 4/10
April 24, 2015

Math help?
P(red&red) = 8/18 * 10/13 = 40/117 why does 18/31 make sense? That would be the probability if all the balls were in a single urn, but you have two separate events from two separate urns.
April 23, 2015

Algebra
which fraction can be reduced to 1/4? That is, can you divide the numerator and denominator by the same number, leaving 1/4 as the result?
April 23, 2015

Math
#1 Permutations, since each office is unique. If just selecting a committee, then it'd be combinations, since the member roles are all the same. #2,3 ok #4 is also permutations, since the order in line matters.
April 23, 2015

Math
still wrong. see earlier post.
April 23, 2015

Math
the line joining the points has slope (6-4)/(2-3) = -2
April 23, 2015

math
since (t-4), he delayed 4 seconds The timer started at t=0. His dive time is t-4. at t=4, he jumped. plug in t=4, and you are left with 2500.
April 23, 2015

math
5 faces, each with (20/5)^2 tiles
April 23, 2015

Geometry
area: 4^2/17^2 volume: 4^3/17^3 Now what is your answer?
April 23, 2015

algebra
since time = distance/speed, 325/(59+x) = 265/(59-x)
April 23, 2015

Math 7th Grade
#1 ok #2 Nope. Check your signs carefully. #3 Nope. Plot a point and fold the paper along the x-axis. Where does the point go?
April 23, 2015

Analytic Geometry
Since all three medians meet there, finding where two intersect is enough. AB has midpoint P at (5,0) BC has midpoint Q at (6,5) The lines CP and AQ are y-6 = (0-6)/(5-2) (x-2) y+4 = (5+4)/(6-4) (x-4) Now just find where the two lines intersect.
April 23, 2015

Geometry
conguent refers to two objects length describes properties of the objects two polygons are congruent if all their sides and angles have equal measure. Saying two objects are congruent is a short way of saying that all their properties are the same. Saves a lot of time.
April 23, 2015

algebra
Man, that's over three years ago!
April 23, 2015

algebra
well, just plug in the values! g(9) = |9-1| = 8 f(g(9)) = f(8) = √(8+1) = 3
April 23, 2015

College algebra
The fonts mangled your symbols, but if I manage to get it right, we have i = √-1 (i+1)(6i-10) = 6i^2 + 6i - 10i - 10 = -6+6i-10i-10 = -16-4i
April 23, 2015

College Algebra
just solve -0.01x^2 + 0.27x + 8.60 = 9.7 -0.01x^2 + 0.27x - 1.1 = 0 -0.01(x^2-27x+110) = 0 -0.01(x-5)(x-22) = 0
April 23, 2015

College math
depending on the precision of the numbers involved, your result might more correctly be written as 8.300
April 23, 2015

History
Viisit: http://www.myassignmenthelp.net/history-assignment-help.php You will get your all answers
April 23, 2015

precalculus
well, what are the discriminants? That is easy, and we can go from there.
April 22, 2015

Calc 2 Indefinite Integrals
Hmmm. dx/(x√(x^3-1)) as you suggest, let x^3 = 1/z^2 x = z^(-2/3) dx = -2/3 z^(-5/3) dz 1/x = z^(2/3) √(x^3-1) = √(1/z^2 - 1) = √(1-z^2)/z so now you have an integrand of -2/3 z^(-5/3) dz z^(2/3) z ------------------------------- √(1-z^2) = -2/3 ...
April 22, 2015

Calculus Indefinite Intergral
#1 makes no sense #2 dx/(1-x^2)^(3/2) If you let x = 1/z dx = -1/z^2 dz 1-x^2 = 1 - 1/z^2 = (z^2-1)/z^2 Now you have -dz/z^2 z^3/(z^2-1)^(3/2) = -z dz/(z^2-1)^(3/2) and the integral is simply 1/√(z^2-1) = x/√(1-x^2)
April 22, 2015

precalculus
The general form is r = k/(1 ± e cosθ) or r = k/(1 ± e sinθ) so, you need to massage what you have into that form 2/(3+2sinθ) = (2/3)/(1 + 2/3 sinθ) so, e = 2/3 do the others in like wise.
April 22, 2015

math
If we started with a in A and b in B, then we are told: a-25 = b+25 (a+100)/(b-100) = 7/2 a = 250
April 22, 2015

Algebra
it's easier to see what you have if you let u = x+5 Then you have 5u^2+2u-7=0 (5u+7)(u-1) = 0 so, u = -7/5 or u=1 That means x+5 = -7/5 x = -32/5 x+5 = 1 x = -4
April 22, 2015

Algebra Help
(x^2-9)(x^2+5) = 0 (x-3)(x+3)(x^2+5) = 0 . . .
April 22, 2015

Art please help me :)
visit: http://www.myassignmenthelp.net/arts-assignment-help.php
April 22, 2015

Algebra
(x^2-9)(x^2+5) = 0 (x-3)(x+3)(x^2+5) = 0 . . .
April 22, 2015

Algebra
16x - 8√x = 35 16x - 8√x - 35 = 0 (4√x + 5)(4√x - 7) = 0 . . .
April 22, 2015

Math
x^2 = 4.5^2 + 6^2 - 2(4.5)(6)cos148° x = 10.1 km
April 22, 2015

Science
you will get lots of help using google.
April 22, 2015

Math
Nope. How does y change when x increases by 1?
April 22, 2015

Math
yes, but b is the divisor For it to divide the big number above (the dividend), there must also be a 5 there.
April 22, 2015

Trig
From the graph, I get about θ=1.3
April 22, 2015

computer programs
int x[6] = (9,17,20,19,20,23); int y[6] = (46,70,58,66,86,64); int i; sumx=0; for (i=0;i<6;i++) sumx+=x[i]; ...
April 22, 2015

Algebra
P(x) = .4x-10 so, P(x)=350 when x=900 Looks like D is the likely answer
April 22, 2015

Algebra
f(x) x:-3, y:3 g(x) x:5/2, y:-5 so, which is farthest from (0,0)?
April 22, 2015

Geometry
20x=140 x=7 so, the sides are 56,35,14,35 The bases are 56 and 14, so the area is (56+14)/2 * 20 The problem is, that if the sides are 35, the height is not 20. Fix that to get the true area.
April 22, 2015

Trigonometry
h/60 = sinθ, so h = 60 sinθ 60 sin20 <= h <= 60 sin36 now just plug and chug
April 22, 2015

math
do we know PQ? and 100m is not much distance between towns.
April 22, 2015

Math
depends on the dimensions
April 22, 2015

Math
-1/((-3+1)/(2-(-2)) = 2
April 22, 2015

Math
m = -2
April 22, 2015

math
If there were a adults, there were (440-a) children. So, the money collected. 42a + 18(440-a) = 12264
April 22, 2015

Math
given the various dimensions, I'd say it holds more water because it is bigger. Of course, that is always true :-) ...
April 22, 2015

Math
I think you are leaving something out. I assume they all have the same height. The area of a polygon increases with the number of sides, if the perimeter is constant. A square has more area than a triangle, and has the most area of any rectangle. A circle has the maximum area ...
April 22, 2015

Math
true only if 2P(A) = P(U)
April 22, 2015

math
clearly, it must be zero
April 22, 2015

geometry
no. it says that all squares are quadrilaterals That is, if a figure is a square, then it is a quadrilateral. after all, "quadrilateral" means four-sided...
April 22, 2015

ipc
if the rock is completely submerged, then its volume is 28.9-13.7 mL That's how much more stuff is in the cylinder after the rock is covered up.
April 22, 2015

Math
Good answer. By definition, √p is positive. In fact 1 is an extraneous solution.
April 22, 2015

Math
Not sure what you mean by saying that its elevation was 8850m "in 1998-2000" since it is always changing. From 1954 to "1998-2000" it rose 2 meters, or 200 cm. Not sure why the average lift rate is given, since we were given the final measurement. Question ...
April 22, 2015

Analytic Geometry
easy with vectors, but they are not usually a tool used in analytic geometry. slope of AB is -3/7 slope of CD is -3/7, so AB||CD slope of BC is 7/3 slope of AD is 7/3, so BC||AD since slopes are negative reciprocals, the pairs of sides are perpendicular So, ABCD is a rectangle.
April 22, 2015

Analytic Geometry
P = (x,2x) (x+3)^2 + (2x-1)^2 = (x-8)^2 + (2x+2)^2 ...
April 22, 2015

algebra
you know it is a factor if the remainder is zero.
April 22, 2015

math
this describes a line. what else do you need to know?
April 22, 2015

math
a + (a+24) = 164
April 22, 2015

scale math
since the scale is constant, (1/4)/1 = x/44
April 22, 2015

Calculus
-12 sinx/cos^2x = -12 secx tanx so, the integral is -12 secx + c -12 sec(0)+c = 4, so c=16
April 22, 2015

integral calculus
Try writing the fraction like this (3-x^7)/√(7+x^2) dx or something. I can't parse your text. I just know that √dx is meaningless, so your fraction is garbled. Use "/" for fractions, as formatting in the browser is problematic at best.
April 22, 2015

math
1/(2n) + 1/(2n+2) = 5/12
April 22, 2015

Math
.82/2.7 * 4.99
April 22, 2015

Math
#1 800*600*2250 ----------------- = 640,000 25*11.25*6 1s = 1/3600 hr = 0.0002777777... 4*162 = 648, so .04*.0162 = 648/(100*10000) = .000648 .2 = .04^0.5, so .2^3 = .008 = .04^1.5 1/.008 = 125 = .04^-1.5 11^2 = 121, so 10^3 = 1000
April 22, 2015

Math
visit: www.myassignmenthelp.net For any Kind of Assignment Help or Homework Help.
April 22, 2015

math
1395(1+.043*7) = ?
April 22, 2015

math
s^5+s^4+s^3+3s^2+2s = s(s+1)^2(s^2-s+2) I don't see any common factors with (s^2+3) so, what do you mean when you ask G(s) is: ?
April 22, 2015

Algebra IMPORTANT
Clearly, 10k+2 is 2(5k+1) so, 5k+1 = 2(2k) k = -1 The sequence is -2 -4 -8 ...
April 21, 2015

please answer my question (math)
You want n/12 = 3/4 since n/12 is the price of one flyboy, and a $3 spinner is the same as 4 flyboys (1/3 dozen)
April 21, 2015

Calc
h(t) = 625 + 20t - 16t^2 so, what is h(2)?
April 21, 2015

Algebra
so, did you graph it?
April 21, 2015

accounting 100
you're obviously embezzling!
April 21, 2015

math
345 = 3*5*23, so no perfect squares So, what methods of solution have you been given? The value will have to be an approximation, so use some numerical method or graphical method to get the value. interpolation, Newton's method, bisection, or something else.
April 21, 2015

math
a^3-b^3 - (a+b) (a-b)(a^2+ab+b^2) - (a+b) I suspect a typo. Had it been a^3-b^3 - a + b That would have been (a-b)(a^2+ab+b^2)-(a-b) (a-b)(a^2+ab+b^2-1) a^2-b^2+10a-2b+24 a^2+10a+25 - (b^2-2b+1) (a+5)^2 - (b-1)^2 (a+5+b-1)(a+5-b+1) (a+b+4)(a-b+6)
April 21, 2015

functions
slope: (600-100)/(2000-1960) = 12.5 Since 1960 is x=0, y = 12.5x
April 21, 2015

Maths
domain is clearly [0,200] m = 12n-120 so, the range is [-120,2280]
April 21, 2015

maths, functions
just solve D(p) = S(p) 1100-200p = 100p-100
April 21, 2015

math
2(8+13)=42
April 21, 2015

math
clearly d=6, since a6 = a4+12 = a4+2d so, since a4=a+3d=a+18=37, a=19 a1=a=19 a7=a+6d=19+6*6=44
April 21, 2015

Chemistry
.18/.27 = 2/3 Looks like Mg3O2, but that doesn't exist. So, what is happening?
April 21, 2015

geometry
1) in a 30-60-90 triangle, the sides are in the proportion 1:√3:2 2) h^2+10^2 = 20^2 3) a^2+4^2 = b^2 unless you know one of the other angles, there are lots of a and b which will work.
April 20, 2015

Calc 1
let u = 1/x then you have tan(3u)/u as u->0 we know that tan(u)/u -> 0, so tan(3u)/u -> 3
April 20, 2015

calculus
at height h, tanθ = h/50 sec^2θ dθ/dt = 1/50 so, plug in your numbers and evaluate dθ/dt
April 20, 2015

Programing Logic and design
days = ("Sunday",...,"Saturday") total=0 for i=1..7 display days[i] read amt[i] total += amt[i] end for for i=1..7 display days[i],amt[i] end for display "TOTAL:",total
April 20, 2015

Math
if the sides are x,y,z, then the package (surface area) is 2xy + 2xz + 2yz So, the new dimensions will be x=3, y+3, z+3 plug in your numbers to find the area
April 20, 2015

math
Hmmm. Your question is ill worded. I suspect you mean g(x) is the integral of e^(3t^2)-3t dt from 4 to x. Otherwise, we'd need the integral of e^(3t^2) which is not elementary. So, with that in mind, dg/dx = e^(3x^2)-3x
April 20, 2015

derivatives
Assuming you meant 5√ and not 5th root, y = (12x-18x^4+3)/(5√(6x^2-11x^4+2)) Using the quotient rule, y' = (12-72x^3)(5√(6x^2-11x^4+2)) - (12x-x^4+3)(5 / 2√(6x^2-11x^4+2))(12x-44x^3) ------------------------------------------- 25(6x^2-11x^4+2) You ...
April 20, 2015

science 8th (:: 1 question
you are correct.
April 20, 2015

science 8th (::
R=E/I You did E-I
April 20, 2015

maths
after t minutes, the temperature T will be T(t) = 300 - 15(t/2)
April 20, 2015

maths
each cycle advances the drunk 2 meters So, after 4 cycles and 4(5+3)=32 seconds, the drunk has advanced 8 meters. The next 5 steps take him to the end, so it takes 32+5 = 37 seconds.
April 20, 2015

math
T4 = 3T1 T7 = 2T3 + 1 Now just plug in the values for Tn and you have a+3d = 3a a+6d = 2(a+2d)+1 Now just solve for a and d.
April 20, 2015

math
if x is at 2%, then the rest (23500-x) is at 7%. So, add up the interest: .02x + .07(23500-x) = 795
April 20, 2015

Math
#1. Draw the number line -9 is to the left of -4, so -9 < -4 #2 C? Excuse me? You say that -2 = -4? Again, use the number line. #3 Nope again. You want C though I suspect that is an accident. The logic is: |2-5| = |-3| = 3 so, -|2-5| = -3 -3 = 8-11
April 20, 2015

math
You are correct on all three. A and B could be true with various numbers, but C is only true if p or q is zero.
April 20, 2015

Trig
as usual draw a diagram. If the height is x, then from distance x, x/h = cotθ so, h cot 48° - h cot 68° = 1
April 20, 2015

Math
60% = 3/5, so (3/5)(3/5)x = 36 x = 36(5/3)(5/3) = 100 for the boys, we have the average as 16*50.25 + 8*45.15 ----------------------- = 48.55 16+8
April 20, 2015

Business Stats
well, what value z corresponds to P(Z>z) = .84?
April 20, 2015

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