Monday
March 27, 2017

Post a New Question

Posts by steve

Total # Posts: 49,627

MATH TEST(tipps)
As longs as you're studying, work on your English: I have a math test in a week; plz give me some tips so I can pass it
February 11, 2017

maths
well, if u = x-y v(u) = u/3
February 11, 2017

maths
A*(x,y)T = (4,4)T (x,y)T = A-1(4,4)T
February 11, 2017

Algebra 2
Not sure I get this step, since ^ is right-associative: 3^(1/2)^x = a^(1/6) 3^3^x = a As written, that means 3^(3^x) I was thinking (3^(1/2))^x = a^(1/6) 3^(x/2) = a^(1/6) 3^(3x) = a 3^3 = a^(1/x) = a^b 1/x = b x = 1/b
February 11, 2017

Math
(203/2.2)/40 * 10 = 23.07 mg
February 11, 2017

Calculus 2
actually, it appears I was right after all...
February 10, 2017

Calculus 2
I may have misspoken. Take a look here for a discussion of the topic. faculty.atu.edu/mfinan/2243/business65.pdf
February 10, 2017

Calculus 2
Money at 2% grows like e^0.02t The amount deposited at time t gets to grow for (9-t) years. Seems to me like the account balance after 9 years is thus ?[0,9] R(t) * e^(.02(9-t)) dt
February 10, 2017

math
(1 1/2)(1/2) = 3/4 So, the new dimensions are 3/4 the original ones. You can do the math now...
February 10, 2017

Algebra
see related questions below.
February 10, 2017

Algebra
Not sure just what you're after. If the sums in the ratio 3:1 are just the first five terms, then a^2(1-r^10)/(1-r^2) ------------------------- = 3 a(1-r^5)/(1-r) ar = 4/3 a = 4/(3r), so plug that in, and (4/(3r))^2(1-r^10)/(1-r^2) ------------------------- = 3 4/(3r)(1-r^...
February 10, 2017

Math
cutting out the fat (!) (16^2/6^2) * 630 / 8 = 560
February 10, 2017

Math
3/5 x + 100 = 2/3 x x is in mL Now just solve for x. And that's liters, not literature!
February 10, 2017

Mathematics
the volume of the orange is ? * 12^2 * 6.75 = 972? cm^3 Now use what you know about the volume of a sphere to get the radius of the orange, and thus its surface area.
February 10, 2017

Math College freshman
(-100-20)/(40-20) = -6 so, the slope is -6, and we start with h = -6x But -6(20) = -120, and h(20) = 20. So h(x) = -6x + 140 You can check to make sure this fits the other points as well.
February 10, 2017

College Algebra
.15*5 = 0.75 So, T = .15p+0
February 10, 2017

Math 115
Clearly, W = 5x+5 The answer key must have an error.
February 10, 2017

Math
correct on both
February 9, 2017

Cmax
Any decent calculator has a button for ex somewhere. Probably an alternate function for ln.
February 9, 2017

Science
the filament has electrical resistance. When electricity passes through it, it generates heat -- so much heat that the wire glows.
February 9, 2017

math
Nope. The rate of growth is the slope of the line. Study (D) to see why it is the choice.
February 9, 2017

math
(b^2)^0 = 1 = b^8 So, b = 1 or -1 Just use the rules of exponents as usual. Negative values are still just numbers! p(p^-7q^3)^-2q^-3 = p * (p^-7 q^3)^-2 * q^-3 = p * p^14 q^-6 * q^-3 = p^15 q^-9
February 9, 2017

Math
.49p = 72.89
February 9, 2017

math
try writing them as 26x - 12y = 4 9x - 12y = -30 Now just subtract the equations and the y's will vanish.
February 9, 2017

English
Bob, I am a 70-year-old grandfather trying to help his grandson. Yes, I have read the book. After going and checking the difference between limited and omniscient I would say that the right answer should be 1st person omniscient.
February 9, 2017

English
The great gatsby is written in which point of view. 1st person limited 1st person omniscient 3rd person limited My answer is c
February 9, 2017

Calculus prince@18
h(x) = ?[2,x^2] arctan(t) dt from the 2nd Fundamental Theorem of calculus (and the chain rule), h'(x) = arctan(x^2) * 2x if F(t) = ?arctan(t), then h(x) = F(x^2) - F(2) now the chain rule gives the result, and d/dx F(2) = 0 If we had had h(x) = ?[lnx,x^2] arctan(t) dt then...
February 9, 2017

math
1 3/2 is bogus. Mixed numbers do not generally have a fractional part greater than 1. Anyway, 3^2 = 9 1 3/2 = 5/2 = 2.5 and now it should be clear. Do the others by putting them all over a common denominator (8), and then just sort the numerators.
February 9, 2017

PHYSICS
the fine article in wikipedia on "trajectory" explains this and more. The formula for the range is R = v^2/g sin(2?)
February 9, 2017

Math
the slope is -3/5 So, now you have a point and a slope. The line is y-4 = -3/5 (x+6) They don't call it the "point-slope" form for nothing!
February 9, 2017

Algebra II
neither one is. (a+b)^2 = a^2 + 2ab + b^2 neither one of these has a middle term. No idea what the "original monomial" could be. x? 4? 2?
February 9, 2017

math
why ever would you subtract radius from height? The volume of towels is the volume of the whole package, minus the volume of the inner cylinder. Recall that the volume of a cylinder is v = ?r^2 h. So, the volume of the towels is ?*12^2*18 - ?*5^2*18 = 2142? cm^3
February 9, 2017

Math/Chemistry
Have you forgotten your Algebra I? Ao/A = kt Ao = Akt
February 9, 2017

Geometric problem solving
first off, the circumference is measured in meters, not m^2. If C = 2?^2, then 2?r = 2?^2 r = ? So, A = ?r^2 = ?^3 m^2 If you meant to find the circumference when the area is 2?^2 m^2, ?r^2 = 2?^2 r^2 = 2? r = ?2? C = 2?r = 2??2? = (2?)^(3/2) Actually, I think you just messed ...
February 9, 2017

math
convert all to have the same power of 10, then it will be clear. For example, 2.3 * 10^5 = 230 * 10^3
February 9, 2017

Math
1/6 * 1/6 * 1/6
February 9, 2017

Precalculus
<k,2>•<3,5> = 0 3k+10 = 0 k = -10/3 gotta watch those ± signs!
February 9, 2017

Math
13/14 = 0.92857 = 92.857% The remainder from 13/14 is 13! Try some other number, say 72/13 = 5 7/13 = 5 R 7 The remainder is always less than the divisor, so 13/14 = 0 13/14 = 0 R 13
February 8, 2017

Finance
Which type of debt is the least attractive for a consumer? Unsecured debt Secured debt Mortgage debt Lease debt My answer is unsecured debt
February 8, 2017

Math
2(4+6) * $4.84
February 8, 2017

Math
no, that would make the answer 8m=102 ...
February 8, 2017

math
Note that you have two right triangles, with a common angle. So, they are similar, with all angles equal.
February 8, 2017

Algebra
well the function f is usually written in the form f(x) = 2x-2 so D looks like the choice intended. But saying Volume(radius) = 67 is a bit strange, since it implies that no matter which value "radius" has, the Volume remains constant at 67. If the value of Volume is...
February 8, 2017

math
I see that this time you omitted the instructions to make a Venn diagram. Did you do that, or are you just waiting for the answers? It appears that you must have meant 6 study only biology since you already said that 60 study biology. I think there is still something missing ...
February 8, 2017

Math
You might have check my solution given earlier before reposting the problem: http://www.jiskha.com/display.cgi?id=1486538658
February 8, 2017

examples of pop singers
Do you have some inappropriate ones in mind???
February 8, 2017

math
There are lots of online calculators, such as https://www.emathhelp.net/calculators/calculus-2/simpsons-rule-calculator/?f=1%2F%28x%5E5%2B7%29%5E%281%2F3%29&a=0&b=1&n=4&steps=on
February 8, 2017

anonymous
well, how many moles of CO2 in 66.50 grams? Use that and your balanced equation to see how many moles of benzene you need. Then convert back to grams.
February 8, 2017

math
well, you know that 2x = y-14 So, use that in the other equation: -4x = -2(2x), so -2(y-14)-y = 14 ...
February 8, 2017

English
exactly backwards. If the first sentence had to include the "was" then it is a progressive tense: was helping. Becca was {helped/helping} Corky with his homework last night. Similarly, the second sentence is a simple past tense: Blossom watched her best friend study ...
February 8, 2017

Math
28,000(1+2.5) = 98,000 70,000 is 250% of 28000, but that means that it increased by 150%. Gets kinda tricky, if you're not careful with the wording.
February 8, 2017

math
correct, assuming that Jack actually ate his slices ...
February 8, 2017

math
well, just do the math: .05 * 1250 = ?
February 8, 2017

Math
7:4 means the lemonade is 7/11 of the total. 7/11 = .6363 8:4 means 8/12 = .6666 I hope that was the reason you picked C.
February 8, 2017

physics
32@W = <-32,0> 11@N = <0,11> Resultant is <-32,11> = 33.8@W19°N
February 8, 2017

Math
If there are x students in all, 1/4 of the non-band students are in neither: 1/4 (x-12) = x/5 x/4-3 = x/5 x/20 = 3 x = 60 Check: 12 in band, leaves 48 others 36 in dance club 12 in neither
February 8, 2017

math
so, what is "the difference" of a circle?
February 8, 2017

Continuity Calculus Help
4x+3 = 11 at x=2 4x^2 = 16 at x=2 Since f(x) = 4x+3 for x <= 2, lim(x->2-) f(x) = 11 = f(2) But lim(x->2+) = 16 ? 11
February 8, 2017

Math
30/90 = 1/3 = 33.3%
February 8, 2017

Math
1/2(4x+2)+8x = (1/2)(4x) + (1/2)(2) + 8x = 2x+1+8x = 10x+1 time to review the distributive property: a(b+c) = ab + ac
February 8, 2017

Math
y = ax^3+bx^2+cx y' = 3ax^2+2bx+c y" = 6ax+2b Since y"=0 at x = -1, -6a+2b=0 3a-b = 0 y'=4 at x = -1, so 3a-2b+c = 4 y=-5 at x = -1, so -a+b-c = -5 Now you have the three equations 3a-b = 0 3a-2b+c = 4 a-b+c = 5 y = x^3+3x^2+7x The tangent line at (-1,-5) has...
February 8, 2017

MAth
well, all three angles add to 180...
February 8, 2017

math
just what does 85 of itself mean?
February 8, 2017

maths equation too hard
There is no general algebraic way to solve equations like this, but it should be easy to see that 3^3 = 3^3
February 8, 2017

algebra
c+r = 8.5 16c+8r = 112 Now just solve for c and r.
February 8, 2017

Math
y is the base Online, use ^ to indicate exponents, as in y^2 and y^4
February 7, 2017

math
since cos 2?/3 = -1/2, r(2?/3) = 0 So, the graph loops back to r=0 at ?=2?/3 Using symmetry, we need consider only the top half of the figure, so we just need to subtract the inner loop from the outer loop, giving us A/2 = ?[0,2?/3] 1/2 r^2 d? - ?[2?/3,4?/3] 1/2 r^2 d? A = ?[0...
February 7, 2017

math
It's easier to find the number of quarters: 10*3q + 25q = 385 55q = 385 q = 7 so, d=3q=21
February 7, 2017

Maths
assuming you meant 1/x + 1/(x+1) = 1 x+1 + x = x(x+1) x^2-x-1 = 0 ...
February 7, 2017

Maths
y/x * 80p
February 7, 2017

Math
80/10 = 8 bags
February 7, 2017

math
possibilities for what? a little more context would help.
February 7, 2017

math
-7/4 -73/100
February 7, 2017

Geometry
recall that the diagonals of a rectangle are equal.
February 7, 2017

Math
You just need to review the meanings of the 1st and 2nd derivatives. y = 3x^4-10x^3+12x^2+12x-7 y' = 12x^3-30x^2+24x+12 = y" = 36x^2-60x+24 = 12(3x-2)(x-1) max/min where y'=0 inflection where y"=0 max if y'=0 and y"<0 min if y'=0 and y"&...
February 7, 2017

math
3.14*10^8 --------------- = 0.046 or 4.6% 6.8*10^9
February 7, 2017

Math Limits
(a) 4 (b) 15 (c) -15
February 7, 2017

Math - Continuity of Functions
(x-2)/(?x-?2) = [(?x-?2)(?x+?2)]/(?x-?2) = ?x+?2 for all x?2 So, if k=2?2 f is continuous everywhere.
February 7, 2017

Maths
Draw a diagram. It should be clear that h cot60° = (h-10) cot30°
February 7, 2017

Math - Continuity of Functions
since |sin(1/x)|<=1 x*sin(1/x) -> 0 as x->0 f(0)=0 will make f defined everywhere.
February 7, 2017

math
Just use the point-slope form and pick any three values for the slope m: y+2 = m(x-6)
February 7, 2017

math
In retrospect, it would probably have been easier to work this one backwards, with no algebra: After round 3: 10,10,10 After round 2: 5,20,5 and so on...
February 7, 2017

math
If the start with amounts x,y,z after the 3 rounds, the holdings are x-y-z, 2y, 2z 2(x-(y+z)),4y,2z-(x-(y+z))-2y = 2x-2y-2z, 4y, 3z-x-y 2(2x-2y-2z), 4y-(2x-2y-2z)-(3z-x-y), 2(3z-x-y) = 4x-4y-4z, 7y-x-z, 6z-2x-2y So, now we have three equations: 4x-4y-4z = 10 -x+7y-z = 10 -2x-...
February 7, 2017

maths
From your sum-to-product formulas, sinA-sinB = 2 cos(A+B)/2 sin(A-B)/2 Using your values, that would be 2 cosx sin2y without knowing more about the relation between x and y, that's as far as we can go. If you supply the missing info, I'm sure you can finish it off.
February 7, 2017

math
k = m-4 k+3 = 2/3 (m+3) Now just solve for k and m.
February 7, 2017

Math
"10 to the power of 2" or 10^2 40 + x = 10^2 40+x = 100 . . .
February 7, 2017

Math
clearly the missing angle is 52° Find two corresponding sides with a known ratio, and use that ratio to find the missing values.
February 7, 2017

science
* ?
February 7, 2017

science
static electricity
February 7, 2017

math
If their ages are a < b < c then c = b+8 a = c-12 a+b+c = 88 ...
February 7, 2017

mensuration
6^2+8^2 = 10^2
February 7, 2017

Question on Integration
let x = 2sinh? x^2+4 = 4sinh^2?+4 = 4cosh^2? dx = 2cosh? d? Now the integral becomes ?x^3 / (x^2 + 4)^2 dx ?8sinh^3?/16cosh^4? 2cosh? d? ?tanh^3? d? see what you can do with that. using direct substitution, let u = x^2+4 du = 2x dx ?x^3 / (x^2 + 4)^2 dx (1/2)?x^2 / (x^2 + 4)^2...
February 7, 2017

Algebra
7d+2b = 11 2d+7b = 16 5d + 2(d+b) = 11 5b + 2(d+b) = 16 add the equations and you get 5(d+b) + 4(d+b) = 27 9(d+b) = 27 d+b = 3 similarly, b-d = 1 b=2 d=1 dog costs $1 burger costs $2
February 6, 2017

Math
Remember that a proportional relationship between x and y means that y = kx. There can be no extra constants floating around. A is a proportional relationship between y and x^2 Only C is a p.r between y and x. For #2, same thing applies.
February 6, 2017

Algebra2
Looks good to me
February 6, 2017

Algebra2
What is the product in simplest form? State any restrictions on the variable. 4a^5/7b^4 times 2b^2/2a^4 My answer is 4a/7b^2 except a=0 and b=0
February 6, 2017

Math
well, sinØ = 3/4 cosØ = ?5/4
February 6, 2017

Math
tan(-a) = -tan(a), so tan(a) = 5 so, cot(a) = 1/5
February 6, 2017

Algebra2
Thank you very much
February 6, 2017

Algebra2
Simplify the rational expression. State any restrictions on the variable. (n^4-11n^2+30)/(n ^4 -7n^2+10) My answer is n^2-6/n^2-2 except +-sqrt5 and +-sqrt2
February 6, 2017

  1. Pages:
  2. <<Prev
  3. 5
  4. 6
  5. 7
  6. 8
  7. 9
  8. 10
  9. 11
  10. 12
  11. 13
  12. 14
  13. 15
  14. 16
  15. 17
  16. 18
  17. 19
  18. Next>>

Post a New Question