# Posts by Steve

Total # Posts: 54,318

Math
If the fraction is (a-|a|)/a then its value is 0 if a is positive 2 if a is negative since |a| = a if a is positive |a| = -a if a is negative

math
use the distance formula for each side. For example, AB = ?((1-3)^2+(4+3)^2) = ?53 and so on. Now, if the sides in order of length are a,b,c then if c^2 = a^2+b^2 then you have a right triangle if less, then acute if more, then obtuse. If all sides are different, then it is ...

Math
Hmmm. You seem to have (almost) lost a minus sign (-2xy^-3)^-5 / (xy^-1)^-1 = -1/32 x^-4 y^14

Math
15 = 5(9-6) 6 years ago, Eve was 3. So, she is 9 today.

Math
the mean is the total divided by the count. So, the original mean is M = (v1+v2+...+vn)/n The new mean is (v1-5 + v2-5 + ... + vn-5)/n = (v1+v2+...+vn - 5n)/n = (v1+v2+...+vn)/5 - 5n/n = M-5

Math
\$/meal * meals = \$

Math
I'm confused too. What is it you want to know? You have a price per meal, and the number of meals...

science
the magnitude z is z^2 = 6^2+6^2+72 = 144 z = 12 Not sure where N and E are ...

math
There are 10 total shares. So, if there are x mangoes in all, we have 2/10 * x = 25

Math
if the commission is x% then 1314 + 5680 * x/100 = 1484.40

Math
you just have to solve for x, where 0.92x = 410

maths
no diagram, but area of rectangle is length * width area of semicircle is 1/2 ? * width*2 subtract one from the other.

Math
17/(17+27) = 17/44 = 0.386 Odds of 3:4 mean there are 3 chances in favor, and 4 against, for a total of 7. The probability is 3/7, because it will happen only 3/7 of the time. (yes=3, no=4)

Math
correct

Math
P(?)=1-P(A) one or the other must happen, so their probabilities must sum to 1.

maths
hmmm. what is a protector? Do you mean protractor? If so, then it is a half circle, and the perimeter p = ?r. Unless you also include the straight side, in which case p = 2r+?r.

physics
the forces are equal. For each force, F=ma

maths
Your answer is not even a probability. It is the number of ways to pick cards. The cards can be DDC: 13/52 * 12/51 * 13/50 DCD: 13/52 * 13/51 * 12/50 CDD: 13/52 * 13/51 * 12/50 = 3*(13*13*12)/(52*51*50) = 39/850

Math
5/12 * 4/11 * 3/10 * 2/9 * 1/8

Algebra I
y = 1/6 x + 4 6y = x + 24 Looks like B to me.

English
thank you

English
Which of these excerpts from Ben Jonson's "Song: To Celia" compares love to intoxication? A. "But thou thereon didst only breathe/And sent'st it back to me." B. "... As giving it a hope, that there/It could not withered be." C. "The ...

English
I see what you mean and it would be C.

English
Which line best states the theme of John Donne's Holy Sonnet 10? A. "and soonest our best men with thee do go" B. "Death be not proud, though some have called me" C. "Death be not proud, though some have called thee..." D. ".. And doest ...

English
I agree with you -- I didn't like the wording of the choices at all.

English
"Our two souls, therefore, which are one/ though I must go, endure not yet/A breach, but an expansion, Like gold to airy thinness beat." Donne is using irony to trivialize the love between him and his wife. Donne is using conceit to describe the love between him and ...

English
thank you

English
In which excerpt from John Donne's A Valediction forbidding mourning does the speaker most directly describe the relationship between him and his wife? a. but we by love so much refind/that ourselves know not what it is b. so let us melt and make no noise/ no tear-floods ...

English

English
I love to hear her speak, yet well I know That music hath a far more pleasing sound; I grant I never saw a goddess go; My mistress, when she walks, treads on the ground: And yet, by heaven, I think my love as rare As any she belied with false compare. I think that the last two...

English
Thousands at His bidding speed And post o'er land and ocean without rest: They also serve who only stand and wait." God sends angels to whisper His will into people's ears. A person who does not dream of greatness cannot have faith in God. A person does not have ...

English
Read these lines, from The Nymph's Reply to the Shepherd. "But could youth last and love still breed,/Had joys no date, nor age no need,/Then these delights my mind might move/To live with thee and be thy love." According to her words here, under what conditions ...

English
thank you

English
".. so this bell calls all; but how much more me, who am brought so near the door by this sickness." Which of these is the best interpretation of this phrase from John Donne's Meditation 17? A. The tolling bell is a metaphor for Heaven. B. The tolling bell is a ...

Math ( ?° ?? ?°)
ha ha ( ?° ?? ?°) aasdas

Math
5/8 d = d-9 solve for d.

math
If we call DE r, then we have r^2? = 1/2 R^2? r^2 = R^2/2 r = R/?2 or, since the areas are in the ratio 1:2, the radii are in the ratio 1:?2

Math
4.2 ml/min * 1440min/day * .26gal/1000ml = 1.572 gal/day

Math
.75c * .5pt/c * ... keep tacking on the conversion factors, making sure that the old units cancel out.

Math
50/((10+10)/2)=5

Algebra I
yes: 12 no: 10,11,13 ?2/?2 = 1 -2/3 * -3/2 = 1 3-2 = -1

Algebra
4/(?3 * 100x) = 4?3/(300x) = ?3/(75x)

Math
|-3|-(-3) = 3+3 = 6 -3 is 3 units left of 0 |-3| is the distance of -3 from 0, or +3

-3*(7+(-3)^2)/3 -3*(7+9)/3 -3*16/3 -48/3 -16

Algebra
so, where do you get stuck? I assume you have some graph paper, and can draw lines ...

MAths
LCM = 2^2 * 5 HCF = - ??? 24 = 2^3 * 3 The other number must have a factor of 5, but your missing info precludes further deductions. I will say that 40 is not a multiple of 24 ...

Maths
x+y=16 xy=48 4*12 = 48 ...

Math
25000(1+.2/2)^(2* 3/2) = 33275

P*1.06^20 = 180000 P = 56125 with a deposit of 126900, she only needs 1.76% interest. How did you arrive at that figure?

Math
4t+3s = 60 s = 2t 4t+6t=60 t=6 s=12 t+s=18

Math
you can play around with Z-table stuff here: http://davidmlane.com/hyperstat/z_table.html

Math
xx63 -39x9 ------- 283x well, 13-9=4, so that leaves xx63 -39x9 ------- 2834 the rest should follow easily enough, going from right to left.

mark check my work algebra
He can't have a negative number of drawings. So, d >= 0. In fact, the domain is all integers >= 0, since there are no partial drawings.

Math
4+3+6-1 = 12 | 36

Math
7260 * (11.25/7.5)

Math
3+2(4+1) = 13 your turn ...

pre algebra
the description of the domain is all real numbers. The interval where f(x) is defined is (-?,?) -- that is, all real numbers.

Math
422 total 32 blue 422-32 white not sure what the 32x8 does. That would be 8 groups of 32 blue tiles...

Math
sum means to add, denoted by + so, what do you think?

math
Huh? "bisects" means it divides DF into two equal parts: DG and GF

math
for the angles, just pair them up in order: G=L, ... for the sides, pair them up: GK=LM, ...

math
sorry - no figures...

Algebra
-2/5 x - 9 < 9/10 -4x-90 < 9 -4x < 99 x > 99/4 4x + 6 < -6 4x < 12 x < 3 q + 12 - 2 ( q-22 ) > 0 q+12-2q+44 > 0 -q+56 > 0 56 > q

computer science
I believe so. Say, how about YOU JUST RUN THEM?!?!

Algebra
nope. you are quite correct! Maybe she wants it as An = An-1 * -1/4 or An+1 = An/4

Math
the shorts were free! . . . If the t-shirts cost \$15 each. what have you left out?

math
3x = x/2 + 50

Math
that's some mean teacher you have...

Maths
x(1 - 1/4 - 2/5 - 1/6) = 55000 That's some fine paycheck he has!!

Math
2/5 : 1/4 = 8:5 1 5/8 = 13/8 so, 8/8 c red 5/8 c blue

Math
A: y+20 ...

There is no linear function which lies between the curves for all values of x. See the graphs at http://www.wolframalpha.com/input/?i=plot+x%5E2-x-2+,x%5E3-x%5E2-2x If you restrict your domain, you can easily specify a line that lies between the curves on some interval.

Math
|y + 4| < 1 means all numbers within 1 of -4... |2t| ? 5 = 7 |2t| = 12 ... |a|-3/4= -5/8 |a| = 1/8 ...

Maths
first, finish defining f(x), and oh yeah, you might actually include a question...

geometry
do you mean each side is enlarged by 300%? If so, then the perimeter is also enlarged by 300%

MATHS
a + a+d + a+2d = 24 (a+d-2)/(a-1) = (a+2d)/(a+d-2)

Maths
15 per thousand is 1.5% 1.015^2 = 1.030225

Math
If the length (AB) is x and the width (BC) is y, then 2x+y = 38 x+2y = 31 add them up and 3x+3y = 69 the perimeter is 2x+2y = 2/3 * 69 = 46

Algebra
If you go to lunch x times, then you also go to dinner at least that many times. So, 5x + 8x <= 42 13x <= 42 x <= 3.23 So, at most 3 lunches and 3 dinners, or 6 meals.

math (trigonometry)
tan A/2 = (1-cosA)/sinA So, you have (1-cosA)/sinA = 1/sinA-sinA = (1-sin^2A)/sinA = cos^2A/sinA so cos^2A+cosA-1 = 0 Solve that for cosA, and then use the fact that cos36° = (1+?5)/4 to prove the result

Math
increased by the same scale factor ...

Computer Science
actually, #1 is syntactically correct, but will print ab Age in Minutes: ...

Computer Science
nope. "t/" and "n/" are also an errors

math
1st step: x/6 = 16 So, what do you think?

math
tacos: 1/4 of 21 1/2 = .25*21.5 = 5.375 = 5 3/8 That leaves 16.125 lbs 2/3 of 16.125 = 10.75 lbs for burgers 10.75 = 43/4 = 43 * 1/4 means 43 burgers

Computer Science
Lose the ; on the for statement!

Algebra
A geometric series with a=40 (for a round trip) and r = 0.6 S6 = 40(1-.6^6)/(1-.6) = 95.33 Now subtract 20 from that, since the 1st "bounce" started from the top.

math
2/3 x = 780 ...

Algebra
to find the common ratio, just divide any term by the one before it. Then you have the formula A(n+1) = A(n)*r Then you can use that to find the next two terms...

Algebra
A(n+1) = A(n) * -1/4

Chemistry
Just replace the Na2 with H2. Both are valence 1.

fluid mechanics
well, you have K = -?p/(?V/Vo) plug in your numbers, right?

Math
11.4/1.4 = ? then round down

Math
(a+b)²-(a-b)² a²+2ab+b² - (a²-2ab+b²) = 4ab not sure what the logs have to do with anything here.

Rate Problem / College Algebra
since time = distance/speed, if the current's speed is x mi/hr, you have 45/(7+x) = = 45/(7-x) - 4 Now just find x.

Maths
If (6-x-x^2) divides g(x), then that means that (3+x) and (x-2) are both factors of g(x) g(x)/(x+3) has a remainder of -27a-3b+27 g(x)/(x-2) has a remainder of 8a+2b+2 Since those are both zero, we have 9a+b = 9 4a+b = -1 a=2, b=-9 g(x) = 2x^3+5x^2-9x-18 = (2x+3)(x-2)(x+3)

Maths
try doing this like the other one. Use synthetic division to find the remainders, and set up equations to solve for a,b,p

Algebra HELP
real: -6 imaginary: -1 time to read that section again ...

calculus 1
well, f'(x) = 12x^2+2x+4 = 2(6x^2+x+2) so, keeping in mind the definition of critical numbers, whet do you think?

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