Answers by visitors named: helper
civilization has been wiped away as has the name and address that was in his head when he was a part of civilization
k 2E-6*E-6/.03^2 -k3E-6*E-6/.02^2
if your q is positive then your answer is negative
If im not mistaken its D.
look it up on the internet duh
look it up on da computa
go on youtube they show videos on that
thnx i already figured that out but i really need help with this one
7x + 2y=10
"Linear function" means straight line with price on the Y axis and bags on the X axis.
So "10,000 bags as $5480" makes up the point (10000, 5480) and "15,000 bags as $7780" makes the point (15000, 7780).
Marginal cost of bags of microwave popcorn is the SLOPE of the line. (Dndubins is wrong. Marginal product is not the y-intercept. It's the slope. The y-intercept is the fixed cost.) In this case, the slope would be the change in cost for every increase in 1 bag of popcorn.
Slope = (Y1-Y2) / (X1-X2) so just plug the points into this equation
(7780 - 5480) / (15000 - 10000) = 2300 / 5000 = 0.46
Therefore, the marginal cost of each bag is $0.46.
You can double check your work by solving for the y-intercept and getting the entire equation of the linear function. The slope-intercept form of the line is y = mx+b so just plug in (10000, 5480).
5480 = 0.46 (10,000) + b
Multiply 0.46 by 10,000
5480 = 4600 + b
Subtract 4600 from both sides
b = 880
Therefore, the equation of the line is Y = 0.46X + 880.
Plug in the second point (15000, 7780) to see if it works
7780 = 0.46(15000) + 880
Simplify the right side:
7780 = 7780
So you know the marginal cost does in fact equal $0.46
multiply the whole equation by 6x.
you would then get rid of all the denominators, having 18 - 2x = x.
and then just solve for x
Ghosts Goblins Ghouls Total
Fr 8 16 27 51
Sat 26 16 9 51
Sun 15 27 9 51
33%
15 ghosts
Area=lw
w=width
w=width of 1st, w=width of 2nd (since their widths are equal)
l=length
l=w+1 length of 1st
l=w+2 length of 2nd
Area of 1st = w(w + 1)
Area of 2nd = w(w + 2) - 5
Therefore,
w(w + 1) = w(w + 2) - 5
Solve for w
6 x ? = 24
what would the ? equal to make this a true multiplication sentence?
find the LCD (lowest common denominator) and then solve
Example: 1/2 + 1/3
the LCD is 6 therefore,
1/2 = 3/6 and 1/3 = 2/6
1/2 + 1/3 = 3/6 + 2/6 = 5/6
Do the same for your problem
I'll answer since this is unanswered, but, I don't think this is how a third grade student is expected to do this problem.
w = width of web
w = size in inches of the 2nd web
2w = size in inches of the 1st web
2w + 3 = size in inches of the 3rd web
1'6" = 18 inches
w + 2w + (2w + 3 ) = 18
5w + 3 = 18
5w = 15
w = 3
1st web = 3 inches
2nd web = 6 inches
3rd web = 9 inches
Total combined width = 18 inches
Step 1
Annual income/4 quarters = quarterly income subject to tax to be sent to IRS
Step 2
Add up the individual tax percents to get the total percent ( 12.4% + 2.9% + 22% = ?)
Step 3
Multiply the result of step 1 by the result of step 2. This is the total tax amount to be sent to the IRS.
An isosceles triangle is a triangle having at least two congruent sides.
In a right triangle, the square of the length of the hypotenuse equals the sum of the squares of the lengths of the legs.
Thus, c^2 = a^2 + b^2
Therefore, since a = b, or x = x, in your problem
8^2 = x^2 + x^2
Solve this equation for x for your answer
A = 1/2 (b*h)
if h = height
then b = 2h - 14
This should be enough for you to try to do the rest.
are you multiplying this?
(2y^2 x^7) * (-xy) * (9x^-3 y)
If so the answer is,
-18x^5 y^4
-12x > 60
divide both sides by -12
since you are dividing by a negative,
the sign changes from > to <
Area (A) = Lw = 288
Perimeter (P) = 2L + 2w = 68
L = length, w = width
Solve 2L + 2w = 68 for either L or w
I'll choose L
2L + 2w = 68
2L = 68 - 2w
2L = 2(34 - w)
L = 34 - w
Substitute L = 34 - w, for L in
A = Lw = 288
(34 - w)(w) = 288
34w - w^2 = 288
w^2 - 34w + 288 = 0
w = 18, 16
So, this certain rectangle has dimensions of 18 by 16.
you should be able to calculate the area and perimeter of the new rectangle now. (double the length and width and solve the equations)
Volume of a cube = e^3
e^3 = 24
e = ?
take the cube root of 24
Area = Length x width
48 = 10 x w
solve for w, which should be a decimal
then draw the rectangle with these dimensions
(x - u )/3 = 5 - y
multiply both sides by 3
(x - u ) = 3(5 - y)
(x - u) = 15 - 3y
- u = 15 - 3y - x
u = -15 + 3y + x
x = orig cost without tax
0.055x = orig cost with tax
x + 0.055x = $179.35
1.055x = 179.35
x = 170.00 orig cost
170.00 - 170.00(0.10) = new cost with coupon without tax
170.00 - 17.00 = 153.00 new cost no tax
153.00 (0.055)tax = 8.42 tax
153.00 + 8.42 = 161.42 new total cost
179.35 - 161.42 = 17.93 savings
please check
A(t) = P (1 + r/n)^nt
P = 5000, t = 7, r = .09, n = 2
A(7) = 5000 (1 + .09/2)^2(7)
A(7) = 5000 (1 + 0.045)^14
A(7) = 5000 (1.045)^14
A(7) = $9259.72 interest
5000 + 9259.72 = 14259.72
A(t) = P (1 + r/n)^nt
P = 6000, t = 5, r = .0410, n = 4
A(7) = 6000 (1 + .0410/4)^4(5)
A(7) = 6000 (1 + 0.01025)^20
A(7) = 6000 (1.01025)^20
A(7) = $7357.47 interest
6000 + 7357.47 = 13357.47
check my math
I am not a tutor
Post what you have attempted to do with this problem so far.
All your problems posted tonight are basically the same.
The tutors don't do your homework for you.
have you found the first derivative?
x(x+1)^3
1st derivative
(x)*3(x + 1)^2*(1) + (x + 1)^3 * (1)
3x(x + 1)^2 + (x + 1)^3
Is this what you have for the 1st derivative?
I'm not a tutor, just a helper, but I've checked my answer twice.
850/5 = ?
875/5 = ?
Slope-intercept form is,
y = mx + b
4x + 2y = -20
Solve this equation for y,
2y = -4x - 20
2y = 2(-2x - 10)
y = -2x - 10
The answer is 3 and -1, from Wolframealpha
I arrived at the - 1 answer, but not sure if the way I solved it is correct and just luck that I got the correct answer of -1!!
maybe a tutor will step in an answer.
List 2 liquid solutions that do not contain water.
I don't think pop is correct, since it has carbonated water in it.
examples, oil, mercury, liquid hydrogen, liquid nitrogen.
not sure about your second question
First you need to know how many square feet by figuring the area
Area = lw = 12*16 = ?
take the answer from above (?) and multiply by $8/sq ft. for your answer
go to wolframalpha dot com and put in (x^3 - 5x ^2 + 6x)/(x^2 - x- 2), it will show you a plot
sqrt(2x-7) >= 5
What don't you understand?
to solve, square both sides to get rid of the radical
2x - 7 >= 25
2x >= 32
x >= 16
Is this what you are looking for?
The sign of the discriminant determines the number and type of solutions.
If +, there are two real solutions
If 0, there is one real solution
If -, there are two imaginary solutions
there are no real solutions, but there are 2 imaginary solutions
b^2 - 4ac < 0,
I got as my solutions
x = 1/2(5 +- 3i sqrt(15))
The answer would be 2.
If the question had been worded how many
'real solutions' (which it isn't) your answer would be 0, since the answer is an 'imaginary number' not 'real number'.
Do you understand the difference between real number (solutions) and imaginary number (solutions)?
I am not a tutor, so maybe
Reiny will answer and can explain more clearly.
Also, I think I confused you above by saying "there are no real solutions, but there are 2 imaginary solution".
I should have just said 2 imaginary solutions, since that was what you were asking.
sorry to confuse you.
yes, the imaginary count as solutions, so the answer is 2.
I think it would be
n(3 - 2) = 15
n = 15
I tried this formula for different variations, ie, forward 3, back 1 for 6 in revolution, forward 4, back 2 for 8 in revolution and it worked.
I am not a tutor.
find the LCD for 5, 35
-3/5 + 8/35 = -21/35 + 8/35 = -13/35
let a = 1st angle, b = 2nd angle
a + 1/4 b = 63.75
a + b = 90
solve this set of equations for your answer
s=1/2(a-b)x
s = 1/2(xa) - 1/2(xb)
s - 1/2(xa) = - 1/2(xb)
multiply both sides by -2
-2s + xa = xb
divide both sides by x
(-2s + xa)/x = b
not a tutor, re-check
you're welcome
(sec^2 (x) - 1)(csc^2 (x) - 1) = 1
sec^2 (x) - 1 = tan^2 (x)
csc^2 (x) - 1 = cot^2 (x)
(tan^2 (x) )(cot^2 (x)) = 1
cot^2 (x) = 1/tan^2 (x)
(tan^2 (x) )(1/tan^2 (x))= 1
tan^2 (x)/tan^2 (x)= 1
1 = 1
a. $80 ea, w = number of wall hangings
$420 total spent
80w > 420
b. w > 5.25
she can't sell .25 of a hanging so,
she would have to sell 6 for a positive profit of $60. (6 @ 80 ex = 480,
480 - 420 = 60)
I am not a tutor.
225 pins made, 400 pins needed
400 - 225 = 175 left to make
120 min to make 175 pins
a. 120p > 175
b. p > 1.46
to check,
120 min * 1.46 pins/min = 175.2 pins
I am not a tutor
x = cost of bindings
6x - 10 = cost of skis
x + (6x - 10) = 494
7x - 10 = 494
7x = 504
x = 72
bindings = $72 ( x = 72)
skis = $422 (6x - 10, 6(72)-10 = 422)
for example,
1st even number- x = 2
2nd even number- 2 + 2 = 4
3rd even number- 2 + 4 = 6
does this help?
I gave you the answer if you think about it
Since a tutor hasn't answer I'll try
A. 1st is a spade
P = S/N
Number of spades in deck = 13 = S
Number of cards = 52 = N
P = S/N = 13/52 = 1/4
B. 2nd is a face card
P = S/N
Number of face cards in deck = 13 = S
Number of cards = 52 - 1 = 51 = N
P = S/N = 13/51
P = P(A) * P(B)
P = 1/4 * 13/51 = 13/204
Not a tutor but I think it is correct
maybe a tutor will answer
12 sin 30degrees - 6 tan of 45 degress + sec 45 degrees / 52.
sin 30 = 1/2
tan 45 = 1
sec 45 = sqrt(2)
12 * 1/2 - 6 * 1 + sqrt(2)/52
12/2 - 6 + sqrt(2)/52
6 - 6 + sqrt(2)/52
0 + sqrt(2)/52 = sqrt(2)/52
D = R*T
D = 60 * 6
D = 360 km
you're welcome!
if probability of an event happening is 1/7
and
if probability of an event not happening is 6/7
ratio of the odds against the event happening vs event happening is
6/7 : 1/7
so, 6 : 1
I am not a tutor
1.fan converts the electrical energy into kinetic energy. this kinetic energy causes the wind to blow..
2.physical change-no change in composition. Ice melts, water boils, water condenses to liquid, liquid freezes.
chemical change- chemical composition changes.
Wood burns to give carbon dioxide, carbon dioxide, smoke, wood ash. No reverse reactions possible.
3. ?
4.The mass loss is due to the burning, which both drives out water and other fluids by converting them to vapor, and gasses like carbon dioxide when oxygen in the air combines with carbon in the log. A very small amount of mass is also converted into energy, and radiated from the log.
I am not a tutor and I googled the answers
Since the 3 angles of a triangle = 180
180 - 40 = 140
140/2 = 70
70 + 70 + 40 = 180
set-up a formula
2x + 3x + x = 180
solve for x
looks right, I got the same answer
I am not a tutor
4x^3-24x
4x (x^2 - 6)= 0
4x = 0
x = 0
x^2 - 6 = 0
x^2 = 6
x = +- sqrt(6)
x = 0, x = +- sqrt(6)
x=1/3y+2
do you mean y = mx + b?
solve for y
3x = y + 6
y = 3x - 6
2logx-log4-log3+logx
3 log x - log 4 - log 3
3 log x - log 12
log (x^3/12)
780/12 = 65 per mo
used for 5 mo = 5 * 65 = 325
refund for 7 m0 = 7 * 65 = 455
green : yellow = 2:5
yellow : orange = 3:4
green : orange = 3:10
if 30 green
then 75 yellow
and 100 orange
30:100 = 3:10
not a tutor
15 min * 60 sec/min = 900 sec
900 sec/6 sec = 150 bags
check
150 bags * 6 sec ea bag = 900 sec = 15 min
a. Volume of rectangular solid
V = L*w*h
720 = L * 18 *h
40 = Lh
h = 40/L
L = 40/h
b. without another dimension, either height or length, there is more than one answer
I am not a tutor
Or
green : yellow = 2:5
yellow : orange = 3:4
green : orange = 3:10
if 2 green
then 5 yellow
and 20/3 orange
2 : 20/3 = 3:10
I am not a tutor
yes, that is correct
37.5% or 37 1/2 %
how much does each drink?
if 8 oz ea
6 * 8 oz = 48 oz OJ
2 * 8 oz = 16 oz GF
so, 1 gal OJ for $2.89 and have left over
or 1 gt and 1 pt = 48 oz for $3.38 more money, no extra
1 pint GF for 1.29 with no extra
this what you need?
A(t) = P (1 + r/n)^nt
here's is the formula
give it a try
P = principal
r = rate
n = term
n = 1 for annually
n = 2 for semiannually
2.00/5 = .40
Is this what you need?
how is the interest compounded?
ie, daily, quarterly, semiannually, annually, or ?
x = cal in an apple
x + 30 = cal in a pear
10x = 7(x + 30)
10x = 7x + 210
3x = 210
x = 70
70 cal = apple
100 cal = pear
A(t) = P (1 + r/n)^nt
A(10) = 5000 ( 1 + .08/1)^1*10
A(10) = 5000 ( 1.08)^10
A(10) = 5000 ( 2.15892 )
A(10) = 10,794.60
5000 + 10794.60 = 15794.60
I'm not a tutor, but I've done this type
problem here before
you're welcome!
I think, since the side that is 28 passes through the center, the radius is 14.
the other two sides are tangent.
draw a pic. mine looks like an ice cream cone, and maybe you will see my thinking.
not a tutor
I think your question is too broad to really answer, but I am not a tutor
thanks reiny, not even my problem, but I couldn't stop thinking about this problem.
my pic and answer was too easy to be right!!
see 1st link below, this same problem was illustrated yesterday.
x = total girls in group
x - 3 = blonds
x - 4 = brunettes
x - 5 = redheads
(x - 3) + (x - 4) + (x - 5) = x
3x - 12 = x
2x = 12
x = 6
1 redhead
2 brunettes
3 blond
V = e^3
V = 3^3
solve for e
"Summary vs. Synopsis
What is a synopsis vs. a summary? A summary is a short explanation of what your book is about. Think of a summary as your "elevator speech" -- suppose you're at a conference step into an elevator and standing next to you is the well-known editor that you've been thinking of sending your book to. "I see you're a writer," the editor says, reading your name tag. "What have you written lately?" Quick! You have between now and the 18th floor to tell the editor all about your book! That's what a summary is: your sales pitch. The summary is often a part of a query letter or proposal package.
A synopsis, which is used when selling novels to editors, is essentially a longer version of a summary, but unlike the sales blurb on the back of a book, the synopsis doesn't leave the reader in suspense. The synopsis tells all. A good synopsis is a running narrative of the book's major events, told in the third person, present tense. A synopsis should capture the flavor of the book, including its tone and language. A summary of a hard-boiled detective story, for example, shouldn't sound like an abbreviated article from the Encyclopedia Britannica.
Your synopsis should introduce your main characters, their goals, and the main conflicts of the story. A "who... wants... but... so" format, useful for kids when writing book reports, also applies here. Who are your main characters? What do they want? But... what gets in their way? So... what do they do about it?
Some writers find that writing a synopsis is a painful process. How do you condense your entire story down to three or so short pages? That's a problem if you write the synopsis after you've written the story. However, some writers get around this problem by writing the synopsis first, as a kind of an outline, then altering it if the story changes as they write. This allows the writer to see the "bigger picture," the entire novel at once, and is a good composing device, as it helps keep your plot on track as you work."
x = number hours
7.25x >= 200.00
solve for x
I don't think anyone will understand what you are looking for.
re-write
sorry, I didn't know.
I got from wiki answers, should or can I just say that.
also, should I not answer at all?
I usual only answer on math topics I'm sure about, and I check my answer at wolframalpha, if possible.
and thank you for your answer
this site is great for students
x/1 + 10/x =7
multiply both sides by x
x^2 + 10 = 7x
x^2 - 7x + 10 = 0
(x - 5)(x - 2) = 0
x = 5, x = 2
if you consider the shape of the letter C as a half circle, the perimeter (circumference ) would be,
C = pi * d, therefore
C = 1/2 pi * d
I really have no idea if this is what you need.
thought I would take a stab since no one has answered.
I am not a tutor
x = total score of tests
x/20 = 8
x = 160
160/21 = 7.62 new average
(4x^4-5x^2+2x-10)/(2x-3)
using long division you answer would be
2x^3 + 3x^2 + 2x + 4 + 2/2x-3)
3 * 4.00 + 2 * 10.00 + 3.00
$12.00 + $20.00 + $3.00
= $35.00
you problem as worded is not clear as to what is needed
An acute triangle has all acute angles (less than 90 degrees)
An obtuse triangle has one obtuse angle, more than 90 deg. and less than 180 deg
28 + 58 = 86
180 - 86 = 94
therefore, this is an obtuse triangle
assuming you mean
16L x 44W
A = LW
A= 16 * 44 = 704 sq
704/10 = 70.4
70.4 * $5.00 = $352
(u-2):(u+3) = 4:3
(u - 2)/(u + 3) = 4/3
3(u - 2) = 4(u + 3)
3u - 6 = 4u + 12
u = - 18
-18 - 2 = - 20
-18 + 3 = - 15
-20:-15 = 4:3
The angle bet. the diag. and the long
side = 30 deg.
The diagonal forms two 30-60-90 triangles
L = sin 60 = op/hy = a/12
L = .87 = a/12
L = a = 10.44
W = sin 30 = b/hy = b/12
W = .50 = b/12
W = b = 6
P = 2*10.4 + 2*6 = 32.8in.
(85 + 75 + 97 + 93 + x)/5 = 87
350 + x = 435
x = 85
The length of the median to the hypotenuse of a right triangle equals one-half the length of
the hypotenuse.
M = 1/2 hypotenuse
5 = 1/2 h
10 = h
+ 672x^5y^2 - 280x^3y^4 + 14xy^6
only the signs were wrong for the above
corrections
I used an online calculator to expand so I know it's right
to get rid of the denominator ( 5 ), multiply both sides of the equation by 5/
so, 5 cancels out of the left side and
5 * 87 = 435 on the right side