Monday
September 26, 2016

Posts by STEVE

Total # Posts: 44,079

Alg
25x = 75 We're happy to help find solutions, but don't make us ask the questions as well, ok?
September 10, 2016

Chem
yep
September 10, 2016

MAth
1+4*3+3(3^2-2^2)=28
September 10, 2016

evans
well, P(success) = 1/13 so use that as usual
September 10, 2016

Math
distributive
September 10, 2016

general adult education
same stupid riddle.
September 10, 2016

Math
5.8/x = cos60°
September 10, 2016

Algebra
3+4=7 minutes before the chopper lands.
September 10, 2016

Math
yes. That means that 168.720 / 0.024 * 1000/1000 = 168720/24
September 10, 2016

math (opt) math 2
If the sides are 30 and 40, the diagonal is 50 so, if the height is h, h/50 = tan30°
September 10, 2016

math or chemistry
That is correct. But really, if you add -2 + -3 + -3 you get -8
September 10, 2016

Math
well, 24 = 12*2 ...
September 10, 2016

Accounting
might neighborly of them, I must say.
September 10, 2016

Algebra
a) correct b) x/3 + 15 c) x+15 d) x/3 + 15 = 3/4 (x+15) x = 9 e) Jane = x+15 = 24 Check: Karen is 3/4 * 24 = 18 15 years ago, she was 3, or 1/3 of 9
September 10, 2016

Maths
recall that dy/dt = dy/dx * dx/dt You have dx/dt = 0.3 so, plug in x=0 dy/dt = (2 - 8/√4) * 0.3 = -0.6
September 10, 2016

Maths
what are the factors of 108? 1 108 2 54 3 36 4 27 6 18 9 12 So, how can those be used to add up to 30? (Remember that one has to be used twice)
September 10, 2016

Intro to Algebra
750,000 - 60,000 = 690,000 2017-1977 = 30 years 690,000/30 = 23,000 V(t) = initial amount + amount increased each year •t Answer: V (t)=60,000+23,000t
September 10, 2016

Science
ok now what?
September 10, 2016

Math 201
surely you can see that each ticket costs $5
September 10, 2016

math or chemistry
Hmmm. I get 106.65 x 10^-8 But, you want that in scientific notation, so it is written as 1.0665 x 10^-6 And, considering the number of significant figures, it would probably be better as 1.1 x 10^-6
September 10, 2016

Math 201H
it looks like each payment was 400 that should help. The balance starts at 14000 and goes down
September 10, 2016

chemnad school computer application
sum=0 for n=101 to 199 step 2 {   sum += n } or, by hand, pair them up: 101 + 199 = 300 103 + 197 = 300 ... how many such pairs are there? Or, since the sum of the 1st n odd numbers is n^2, 100^2 - 50^2 = 7500
September 10, 2016

Math
j = 3g j = 4b g = 8 Now just find b: j = 3*8 = 24 24 = 4b b = 6
September 9, 2016

physics
75 mi/hr * 1609m/mi * 1hr/3600s * 3s = (75*1609*3)/3600 m
September 9, 2016

Math
140 = 2^2 * 5 * 7 168 = 2^3 * 3 * 7 210 = 2 * 3 * 5 * 7 So, what is the biggest number that divides all of those?
September 9, 2016

Physics
distance: s = 1/2 at^2 speed: v = at
September 9, 2016

Physics
time rising: 4.9t^2 = 1.29 double that for total hang time. v = 9.8t
September 9, 2016

Math
can't see the diagram, but just add up the distances. How hard is that?
September 9, 2016

Physics
4.9t^2 = 370 v = 9.8t
September 9, 2016

math
well, there are 4 sides, so ...
September 9, 2016

Math
since the other wall is also 20 ft, and area = length * width, it is 20ft * 20ft = 400 ft^2
September 9, 2016

Algebra
2^-1 + 4^-5 = 1/2^1 + 1/4^5 = 1/2 + 1/1024 = 513/1024 You can always type in your expressions at wolframalpha.com to verify your answers
September 9, 2016

Math
read the question again carefully. Only boys or girls in each row. Why did you combine them into rows of 18?
September 9, 2016

Math
consider that 9 divides both 72 and 90
September 9, 2016

Physics
F = ma, so together, (6.0+4.0) = 3.2a opposite, (6.0-4.0) = 3.2a
September 9, 2016

Physics
F = ma, so 0.40a = 25
September 9, 2016

Grammar world
subject, verb, dir obj, obj complement they | crowned | him / king
September 9, 2016

Algebra
Hmm. Watch those minus signs. (x^-2)^3 (x^2)^4 = x^-6 * x^8 = x^2 x^2/x^15 = 1/x^13 = x^-13
September 9, 2016

Math
15 m/s * 1km/1000m * 3600s/hr = 15*3600/1000 km/hr 750m * 1s/15m = 750/15 s
September 9, 2016

math
The difference in meaning is that -3 is a signed value. It lies to the left of zero +3 is also a signed value, and since it is positive, it lies to the right of zero |-3| is just the physical distance (left or right) of -3 from zero. Since we live in a physical world, all ...
September 9, 2016

Math Help needed quickly
Think on it. If there were 55 ml alcohol, there would be 45 ml water. That's 10 ml less. We have 20 ml less, so there must be 110 ml alcohol 90 ml water
September 9, 2016

Math - hmmm
I'm not familiar with this notation. Have you some other information, maybe a subject topic in your text?
September 9, 2016

Math
just add up the amount of work done by A and B in a minute. Together, they do 1/20 of the job: 1/36 + 1/x = 1/20
September 9, 2016

Math
I think that's draughts, not droughts! Just my dry wit...
September 9, 2016

Calculus
so it does. It's just Algebra I to figure it out. What do you get?
September 9, 2016

calculo
f = 4x^(5/4) + 10x^(3/2) f' = 4(5/4)x^(1/4) + 10(3/2)x^(1/2) = 5∜x + 15√x f'(4) = 5∜4 + 15√4 = 5√2 + 30
September 9, 2016

Math
4Q-8 = 3 4Q = 11 Q = 11/4
September 9, 2016

mates
20+65 = 85 + 76 = 161
September 9, 2016

Math
Using 15% of 27.60 is wrong, because the 27.60 already includes the tip. Instead, you should use 3p * 1.15 = 27.60
September 9, 2016

Math
you know that the whole circumference is 2πr. You have only a fraction of that; namely, 110/360 * 2πr
September 9, 2016

Calculus
dT/dt = -.0065 dh/dt so plug in you number for dh/dt
September 9, 2016

Algebra 2
must be right then.
September 9, 2016

ALGEBRA 2
no problem. Guess all you had to do was think about it a bit.
September 9, 2016

Math
(1/2)/2 + 1
September 9, 2016

math
That is correct. They have to satisfy the Cauchy-Riemann equations.
September 9, 2016

Math.
you're kidding, right? with google and online dictionaries at your fingertips, you post such a question?
September 9, 2016

anal.gom.
oops. I botched it a bit, and lost the 3. We pick it up here: (x+8)^2 + 3(y - 50/3)^2 = 2680/3 now get rid of that pesky 3: (x+8)^2/3 + (y-50/3)^2 = 2680/9
September 9, 2016

anal. geom.
try completing the squares: x^2+16x + 3y^2-100y = -4 x^2+16x+64 + 3(y^2 - 100/3y + (50/3)^2) = -4 + 64 + 3*(50/3)^2 (x+8)^2 + (y - 50/3)^2 = 2680/3 unusual, but hey, it's just numbers, right? But still, it's so odd that I suspect a typo. You sure it's not 4y^2? If ...
September 9, 2016

help please?!
well, it went down 1/2 M in 1/2 minute.
September 9, 2016

Chemistry
I think you need to recall that 1 mole of any gas occupies 22.4L at STP.
September 9, 2016

maths
why don't you make a nice table out of all this stuff and work up some Venn diagrams and maybe show some work and let us know just what the trouble is instead of just tossing a bunch of numbers and stuff into the vat and stirring it up into one long and confusing run-n-and...
September 9, 2016

English
#2 is more commonly sung, as it reflects the folksy hillbilly type of feel of the song. I have never heard #1 used. Ever. As for the meaning, #1 Nope. #2 maybe, in the sense that the singer is on a trip, coming from Alabama. #3 an ungrammatical rendering of "I have come&...
September 9, 2016

Math.
rd 45: 45 3*15 wraps: 15 more 3*5 wraps: 5 more 3*1 + 2 wraps: 1 more 1+2 wraps: 1 more
September 9, 2016

Maths
j = d-3 d+4 = (3/2)(j+4) plug in j and solve for d.
September 9, 2016

Math
well, x(x+7) is a multiple of 60. 5*12 = 60 guess that works, eh?
September 9, 2016

Physics
the speed drops from v to zero when the ball reaches max height. since the speed is v - 9.8t that is zero when t=3, so v - 9.8*3 = 0 ... then, you know that the height is vt - 4.9t^2 Now you know v, and t=3, so plug and chug.
September 9, 2016

MATH TRIGONOMETRY
Tell you what. I'll do the graph, and you answer the questions. http://www.wolframalpha.com/input/?i=-x(x-1)(x%2B2)
September 8, 2016

Algebra 2
if a lbs are type a, then the rest (600-a) are type b. So, add up the parts and make sure it matches the whole: 75a + 52(600-a) = 60*600
September 8, 2016

Physics
a = 42m/s / 2s = 21m/s^2 s = 1/2 at^2
September 8, 2016

Math
5(14+10) = ?
September 8, 2016

Math
Not D, because f(3) has two different values. So, f is not a function.
September 8, 2016

Math
next steps: 8(7-27)/8 + 245 8(-20)/8 + 245 ...
September 8, 2016

Math
as long as each x value appears only once, it is probably a function. So, I'd pick A and B on that basis. D also works. While 0 appears twice as the first element, the 2nd element is the same. So, the pair (0,3) appears twice, but it does not violate the rules for functions.
September 8, 2016

Math
8 + 6/2 = 11
September 8, 2016

math
v = at so, how long does it take to fall 685 ft?
September 8, 2016

Math
not sure what each watermelon with 12.73 inches and 2.7 inches in height means
September 8, 2016

Algebra
3*84 <= 81+87+x <= 3*89 254 <= 168+x <= 267 ...
September 8, 2016

Algebra
since distance = speed * time, 20x = (20-4)x + 6 and I think you meant "downwind"
September 8, 2016

Math
correct. If you type in your expressions at wolframalpha.com you can check your answers quickly. For example, http://www.wolframalpha.com/input/?i=2+1%2F7+divided+by+3+2%2F3
September 8, 2016

math
That's h of x, not h times x. h(x) = √(4-x^2)/(x-3) or h(x) = √((4-x^2)/(x-3)) In either case, x=3 is excluded because the denominator is zero. Now, √z has a domain of z>=0. In the first case, 4-x^2 >= 0, so x^2 <= 4 |x| <= 2 In the second ...
September 8, 2016

Maths
roughly 0.6 * 150
September 8, 2016

Algebra 2
15000/3500 = ? round up to next whole bucket
September 8, 2016

Technology
correct
September 8, 2016

Math
just write down the parts and add them up
September 8, 2016

Algebra
well, 7^2 = 49 8^2 = 64 So, it's either 7 or 8, but now you gotta figure which one.
September 8, 2016

Math
oh, well, 1 3/7 = 1+3/7 = 7/7 + 3/7 = 10/7
September 8, 2016

Math
well, the idea is right, but 3/7 = 15/35 Then, do just what you did with the previous problem: 15/35 - 38/35 = -23/35 Plus, you misspelled "to"
September 8, 2016

math
yes.
September 8, 2016

math
huh? This is exactly like the last one; just use different numbers. What do you get?
September 8, 2016

math
c = t+60 t = 2/3 c or, t = 2/3 (t+60)
September 8, 2016

Math
hey, it's nice to see a problem posted that shows some thought and effort.
September 8, 2016

Math
yep
September 8, 2016

Math
for sphere, v = 4π/3 r^3 for cylinder, v = πr^2h so, since the radius of the cylinder is 1, 4π/3 (1^3+2^3) = πh
September 8, 2016

Math
draw a diagram. The diagonal of the square is the diameter of the circle. Knowing that, you can figure the area of the square.
September 8, 2016

science
#1 Really, lattices are found in crystals. (Plus, why would that be affected by a charged balloon?) #2 C looks good to me.
September 8, 2016

Math
google is your friend. just search for equilateral triangle. If the side is s, then perimeter = 3s area = √3/4 s^2
September 8, 2016

Mathematics
(3 5/7)x = 3 1/4 (26/7)x = 13/4 x = 13/4 * 7/26 = 13/26 * 7/4 = 1/2 * 7/4 = 7/8
September 8, 2016

Math
total points for 4 tests @ 96 = 384 points so far: 94+98+98 so, how many does he need on the last exam? Hint: 96 is the average of 94 and 98
September 8, 2016

Science
a magnet will get the iron oil floats on water evaporate the water to get salt
September 8, 2016

physics
The larger car is the Mercedes-Benz.
September 8, 2016

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