helper

If possible, could a math tutor check the math post question that "daylo3" asked at 6:42 pm today, that I answered? I don't usually answer posts that I am not 100% sure of the answer. I would like to know if the way I approached this problem is correct? T...

14 years ago

I will email as soon as I can. My email is not working at this moment and I don't know why. My son-in-law is looking into it right now.

14 years ago

1. What is the simplified form of the expression? 2x2 + 4y + 3x2 – 2y + 3y (1 point) 5x4 + 5y2 5x2y + 5x2y 5x2 + 5y 10x2y 2. Simplify the following expression: 2(6x + 18) (1 point) –12x + 36 8x + 20 6x + 36 12x + 36 3. What is the product? 4 • (–5) (1 poi...

7 years ago

Lesson 2: Patterns, Equations, and Graphs CE 2015 ALG I A1 2520 Unit 3: Solving Equations 1. Which of the following is an example of an open equation? (1 point) 5x + 7 = 12 12 + (–8) = 4 25 = 5(5) 8 + 0 = 8 1.A 2.D 3.B 4.A 5.D 6.D 7.C 8.C 9. (SA) the (4,1...

7 years ago

Which expression is equivalent to 0.000000034 A 3.4 x 10^ -7 B 3.4 x 10^8 C 3.4 x 10^ -8 D 3.4 x 10^7

6 years ago

Answers for Unit 6 Lesson 2 "¡Me gusta!" 8th grade: 1. If you eat chile "todos los días," how often do you eat it? D. every day 2. If you "nunca" eat red meat, how often do you eat it? B. never 3. Which expression means "more or less?" A. mas o menos 4. I...

3 years ago

Answers to The United States and East Asia Quick Check. 1.Why was it important to expand American influence in China? B. Lucrative Trade 2.Which of the Following sentences best describes a sphere of influence in relation to China? B. It gave a nation excl...

3 years ago

civilization has been wiped away as has the name and address that was in his head when he was a part of civilization

17 years ago

k 2E-6*E-6/.03^2 -k3E-6*E-6/.02^2 if your q is positive then your answer is negative

16 years ago

If im not mistaken its D.

16 years ago

look it up on the internet duh

16 years ago

look it up on da computa

16 years ago

go on youtube they show videos on that

16 years ago

thnx i already figured that out but i really need help with this one 7x + 2y=10

16 years ago

"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 S...

16 years ago

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

15 years ago

Ghosts Goblins Ghouls Total Fr 8 16 27 51 Sat 26 16 9 51 Sun 15 27 9 51 33%

14 years ago

15 ghosts

14 years ago

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

14 years ago

6 x ? = 24 what would the ? equal to make this a true multiplication sentence?

14 years ago

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

14 years ago

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" =...

14 years ago

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 tota...

14 years ago

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 y...

14 years ago

A = 1/2 (b*h) if h = height then b = 2h - 14 This should be enough for you to try to do the rest.

14 years ago

are you multiplying this? (2y^2 x^7) * (-xy) * (9x^-3 y) If so the answer is, -18x^5 y^4

14 years ago

-12x > 60 divide both sides by -12 since you are dividing by a negative, the sign changes from > to <

14 years ago

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^...

14 years ago

Volume of a cube = e^3 e^3 = 24 e = ? take the cube root of 24

14 years ago

Area = Length x width 48 = 10 x w solve for w, which should be a decimal then draw the rectangle with these dimensions

14 years ago

(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

14 years ago

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 = 1...

14 years ago

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...

14 years ago

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.

14 years ago

have you found the first derivative?

14 years ago

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.

14 years ago

850/5 = ? 875/5 = ?

14 years ago

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

14 years ago

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.

14 years ago

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

14 years ago

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

14 years ago

go to wolframalpha dot com and put in (x^3 - 5x ^2 + 6x)/(x^2 - x- 2), it will show you a plot

14 years ago

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

14 years ago

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

14 years ago

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))

14 years ago

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 ima...

14 years ago

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.

14 years ago

yes, the imaginary count as solutions, so the answer is 2.

14 years ago

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.

14 years ago

find the LCD for 5, 35 -3/5 + 8/35 = -21/35 + 8/35 = -13/35

14 years ago

let a = 1st angle, b = 2nd angle a + 1/4 b = 63.75 a + b = 90 solve this set of equations for your answer

14 years ago

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

14 years ago

you're welcome

14 years ago

(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

14 years ago

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.

14 years ago

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

14 years ago

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)

14 years ago

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

14 years ago

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 =...

14 years ago

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

14 years ago

D = R*T D = 60 * 6 D = 360 km

14 years ago

you're welcome!

14 years ago

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

14 years ago

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 ch...

14 years ago

Since the 3 angles of a triangle = 180 180 - 40 = 140 140/2 = 70 70 + 70 + 40 = 180

14 years ago

set-up a formula 2x + 3x + x = 180 solve for x

14 years ago

looks right, I got the same answer I am not a tutor

14 years ago

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)

14 years ago

x=1/3y+2 do you mean y = mx + b? solve for y 3x = y + 6 y = 3x - 6

14 years ago

2logx-log4-log3+logx 3 log x - log 4 - log 3 3 log x - log 12 log (x^3/12)

14 years ago

780/12 = 65 per mo used for 5 mo = 5 * 65 = 325 refund for 7 m0 = 7 * 65 = 455

14 years ago

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

14 years ago

15 min * 60 sec/min = 900 sec 900 sec/6 sec = 150 bags check 150 bags * 6 sec ea bag = 900 sec = 15 min

14 years ago

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

14 years ago

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

14 years ago

yes, that is correct 37.5% or 37 1/2 %

14 years ago

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?

14 years ago

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

14 years ago

2.00/5 = .40 Is this what you need?

14 years ago

how is the interest compounded? ie, daily, quarterly, semiannually, annually, or ?

14 years ago

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

14 years ago

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

14 years ago

you're welcome!

14 years ago

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

14 years ago

I think your question is too broad to really answer, but I am not a tutor

14 years ago

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!!

14 years ago

see 1st link below, this same problem was illustrated yesterday.

14 years ago

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

14 years ago

V = e^3 V = 3^3 solve for e

14 years ago

"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-...

14 years ago

x = number hours 7.25x >= 200.00 solve for x

14 years ago

I don't think anyone will understand what you are looking for. re-write

14 years ago

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.

14 years ago

and thank you for your answer this site is great for students

14 years ago

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

14 years ago

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 tut...

14 years ago

x = total score of tests x/20 = 8 x = 160 160/21 = 7.62 new average

14 years ago

(4x^4-5x^2+2x-10)/(2x-3) using long division you answer would be 2x^3 + 3x^2 + 2x + 4 + 2/2x-3)

14 years ago

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

14 years ago

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

14 years ago

assuming you mean 16L x 44W A = LW A= 16 * 44 = 704 sq 704/10 = 70.4 70.4 * $5.00 = $352

14 years ago

(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

14 years ago

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.

14 years ago

(85 + 75 + 97 + 93 + x)/5 = 87 350 + x = 435 x = 85

14 years ago

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

14 years ago

+ 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

14 years ago

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

14 years ago