# Posts by helper

Total # Posts: 1,883

**math**

You are welcome :)

**math**

Set up a ratio 234 : 100 = 400 : x 234/100 = 400/x cross multiply 234x = 40,000 x = 170.94

**Complex Numbers**

You are welcome

**Complex Numbers**

x^2 - 6x + 25 = 0 Subtract 25 from both sides: x^2 - 6x = -25 Add 9 to both sides: x^2 - 6x + 9 = -16 Factor the left hand side: (x-3)^2 = -16 Take the square root of both sides: |x - 3| = 4i Eliminate the absolute value: x - 3 = -4i or x - 3 = 4i Add 3 to both sides: x = 3 - ...

**geometry**

Area of an equilateral triangle A = 1/4(s^2 * (sqrt(3))

**Geometry**

Is this the exact wording of your problem? Are you looking at a picture? An angle doesn't have 'sides'. Two lines or rays form an angle. Where are you getting three sides?

**math**

15 gal/tank x 25 mpg = 375 miles/tank 2500 mi / 375 per tank = 6.67 tank fills = 7 tank fills (Joe always fills tank) 15 gal per tank x 7 tank fills = 105 gal 105 gal x 2.99/gal = $313.95 gas expense

**math**

3 gal = 12 quarts Each scoop makes 3 quarts 12 quarts / 3 quarts per scoop = 4 scoops

**math**

V = pi r^2 h V = (3.14)(17^2)(3) V = ?

**math**

V = pi r^2 h V = (3.14)(6^2)(12) V = ?

**math**

You must have a typo. None of the choices are correct. starting at5:380p.m ?

**Math (Algebra 2)**

x^4 + 8x^2 - 20 (x^2 - 2)(x^2 + 10)

**ap calculus**

By Theorem ∫ e^x dx = e^x + C

**Geometry**

Perimeter = 36 36 - 18 longest side = 18 This would mean that the remaining TWO sides total 18. The length of any side of a triangle will always be less than the sum of the lengths of the other two sides and greater than the difference of the lengths of the other two sides. 18...

**algebra**

3.20x = value of blooming annuals 3.20 each plant * x number of plants = ttl cost 1.50y = value of non-blooming annuals 1.50 each plant * y number of plants = ttl cost 3.20x + 1.50y = 49.60

**algebra**

24 is the total number of plants. x = number of blooming annuals y = number of non-blooming annuals x + y = 24

**algebra**

"write a linear system of equations" This is a linear system of equations. You can use x and y instead of n and b. x = number of blooming annuals y = number of non-blooming annuals 3.20x = value of blooming 1.50y = value of non-blooming x + y = 24 3.20x + 1.50y = 49....

**algebra**

b = number of blooming annuals n = number of non-blooming annuals 3.20b = value of blooming 1.50n = value of non-blooming b + n = 24 3.20b + 1.50n = 49.60 Solve the system

**algebra**

Multiply by -5 (-3x - 4y = 21) Multiply by 4 (8x - 5y = -9) 15x + 20y = -105 32x - 20y = -36 47x + 0 = -141 47x = -141 x = -3 8x - 5y = -9 x = -3 8(-3) - 5y = -9 -24 - 5y = -9 -5y = 15 y = -3

**Calculus**

I just looked at the graph. You want the area from x = 0 to x = 1. | = integrate symbol | x^9(1 - x) | x^9 - x^10 Then plug in x, from 0 to 1.

**Calculus**

Were you given (a,b) values? From x = ? to ?

**Math**

Do you mean, ((cube rt(625y))^3 z^7 ? If so, ((cube rt(625y))^3 z^7 = 625y z^7

**math**

Do you have a choice of dimensions?

**Finance**

Income----------46,660 Interest-----------225 Dividends-----------80 Income Adj-------1,150 Sub Total-------48,115 Less Item Ded----7,820 Sub Total-------40,295 Less Exempt------3,400 Taxable Income--36,895 Check my math

**Finance**

See later post above.

**math**

b = price of burgers d = price of dogs 2b + 5d = 8.00 5b + 2d = 9.50 Solve simultaneously

**parts of speech**

What is huour? Is this humor?

**Geometry**

P = 2L + 2w Since this is a square, L = w P = 2(0.66) + 2(0.66) P = 1.32 + 1.32 P = ?

**math**

n = number of adults 6.80n = value of adults 387 - n = number of children 3.40(387 - n) = value of children 6.80n + 3.40(387 - n) = 2444.60 Solve for n = number of adults 387 - n = number of children

**Math**

n = number of ones 1n = value of ones 68 - n = number of fives 5(68 - n) = value of fives n + 5(68 - n) = 172 n + 340 - 5n = 172 -4n = -168 n = 42 n = 42 ones = 42.00 68 - n = 26 fives = 130.00 68 bills = 172

**Statistic**

Delisha/James, please see your 1st post at 1:21 am under "James". Your post was answered there.

**finance**

x = total customers need to buy .03x = 840 x = 28,000

**finance**

$8000 add on interest rate of 11% 8000 x .11 = 880 add on interest/yr 880/yr x 4/yrs = 3520 3520/2 = 1760 1760 total interest on loan 1760 add on interest added to principal 8000 principal + 1760 towards principal = 9760 total loan principal 9760/48 mo = 203.33/month payment ...

**finance**

18% APR -How is this compounded? Yearly, daily, quarterly, etc?

**college algebra**

5 + 2(4y - 4) = 3(2y - 1) 5 + 8y - 8 = 6y - 3 8y - 3 = 6y - 3 2y = 0 y = 0

**math**

Put the words into an equation or mathematical expression. 34 multiplied by d 34 times d 34 x d 34d

**finance**

I = PRT (Interest = Principal x Rate x Time) 13.2% = .132 6 mo = .5 yr I = 1500 x .132 x .5 I = 198 x .5 I = 99 I don't know what you mean by cost? Interest is a form of 'cost' for the loan.

**Math**

Slope of the curve at, y = x^6 at x = -3 y' = 6x^5 at x = -3 6(-3)^5 = -1458

**AP Psychology**

Is this a typo? hueristic?

**Excel**

I'm not sure I'm following you. Do you just want the total 39.60 in the total column? If so, go to Cell E (col E) and click on 'Auto Sum'. One of the choices are "More Functions". Click on that. A box will come up. Type "Product" in that box...

**Excel**

You don't want a sum, you want a product. Use auto sum button, and choose more functions, put multiply or product in the search box and choose 'Product'.

**math**

Please check one of your previous posts. You have posted this exact question 4 times today. It has been answered by 3 different tutors. Exactly what is it that you do not understand?

**algebra**

-2/5 x = 6/35 Multiply both sides by 35 -14x = 6 x = -6/14 = -3/7

**algebra 1a**

Assuming you want to solve these simultaneously. 9m + n = 22 m - 3n = 18 To eliminate variable n, mulyiply the first equation by 3 3(9m + n = 22) = 27m + 3n = 66 Now add these two equations together 27m + 3n = 66 m - 3n = 18 28m + 0 = 84 28m = 84 m = 3 Substitute m = 3 in m - ...

**math**

V = Lwh w = width w - 2 = height w + 4 = length 8(w + 4) = V 8(w + 4) = w(w - 2)(w + 4) Solve for w

**physics**

thaokieu, the tutors are not here to do YOUR homework. You have to try to solve these yourself. Post your work for each problem and someone will help if you are stuck.

**Pre-Calculus-Trig**

Chloe, the tutors are not here to do YOUR homework. You have to try to solve these yourself. Post your work for each problem and someone will help if you are stuck. It helps if you draw a picture. The problems I've done for you today all involve right triangles. So read ...

**algebra 1a**

4(8-2x)+2x<5(9+3x) 32 - 8x + 2x < 45 + 15x 32 - 6x < 45 + 15x -21x < 13 When dividing by a neg number, the sense of the inequality is reversed x > -13/21

**Pre-Calculus-Trig**

Draw a triangle. The the road would be the base, which is 1 mile or 5280 feet and the side opposite angle A would be 140. You need angle A. You have side a = 140 feet, and side b = 5280 feet. tan A = opp/adj = a/b = 140/5280 tan A = 140/5280 = ? arctan ? = angle A

**math**

Please don't repost a question without checking to see if your original post was answered. See your 1st post at 4:51 pm. This was answered for you.

**finance**

P = M/(1 + r)^n P = price M = maturity value r = investor's required annual yield/2 n = number of years to maturity x 2 225 = 1000/(1 + r/2)^22 225(1 + r/2)^22 = 1000 (1 + r/2)^22 = 4.4444 take the 22nd root of each side 1 + r/2 = 1.07015 r/2 = 0.07015 r = .1403 r = 14% ...

**algebra**

For each equation, pick values for x and solve for y. Pick at least three pair of x,y values and then plot these points. Draw a line connecting these points. Do this for each equation. The point where these line graphs intersect is the solution.

**accounting**

Are you sure it's only one journal entry? For the $50 mil transaction, $50 DB to Asset Account, $10 mil paid in cash (CR Cash) and the remaining $40 mil is a loan payable (CR Loan Pay). Since $8 mil principal and interest is due each Dec 31, this must be a 5-yr loan (40 ...

**Algebra II**

Correct!

**Algebra II**

I = PRT Divide both sides by PT I/PT = R

**algebra**

And, your question is? y + x = -4 ?

**Algebra**

Do this the same way as shown in your 1st post.

**Algebra**

Find ordered pairs to graph these equations. x + y = 6 x = 0, y = 6 x = 2, y = 4 x = 4, y = 2 x = 6, y = 0 x - y = 4 Do the same for this equation. Plot the points, for each equation and draw a line for each set of points. The point of intersection is the solution.

**accounting**

You're welcome.

**accounting**

If for the following year, the entry should have been to prepaid insurance, an asset account, not to insurance expense. This is because the expense is not for the current year. The expense belongs in the next fiscal year. Current year entry, should have been DB Prepaid ...

**Accounting-Journal Entry**

I don't see a question.

**math**

Do you mean the wall is 12 feet by 16 feet? If so, set up a ratio. 12 : 16 = 4 : x 12/16 = 4/x Cross multiply 12x = 64 x = ?

**algebra**

Do you mean, 5^2 n + 1 = 1/25 ? 25n + 1 = 1/25 multiply both sides by 25 625n + 25 = 1 625n = -24 n = ?

**6th grade math**

'tghias' is NOT correct.

**Math PLEASEE**

Do you mean, x^2 - 4 ? x^2 - 4 = (x - 2)(x + 2)

**Math- Geometry**

Ratio 5 : 2 5x + 2x = 20 Solve for x.

**College algebra**

Re-type your problem. What is 7 4 1 4 ?

**math**

What rectangle? Re-read your problem. If you knew absolutely nothing about this problem, could you solve it with the information given?

**Calculus**

I guess it depends on your teacher, because (2)^3/2 means (sqrt(2))^3 I've never seen anyone interpret this as (sqrt(2^3)). The first way will always get you the correct, simplified answer. If I were you, I would get in the habit of doing this the first way. Radicals ...

**Calculus**

2/3(8)-ln3-2/3(sqrt*8) My answer, 16/3 - ln 3 - 4/3(sqrt(2)) You have 16/3, 2/3 (8) = 16/3 Where you went wrong, You have, 2/3 (sqrt(8)) It should be, 2/3 (0 + 2)^3/2 2/3 (2)^3/2 2/3 (sqrt(2))^3 2/3 (2(sqrt(2))) 4/3 (sqrt(2))

**trigonometry**

Please do not repost questions without checking to see if your original post was answered. Check your earlier post (2:44 am). This question was answered for you.

**math**

Check your problem. Not enough info is given here to solve this problem.

**Math**

If he spends the same time doing 3 different activities, 80 hrs/3 = ?

**math**

n = number of dimes 21 - n = number of quarters .10n = value of dimes .25(21 - n) = value of quarters .10n + .25(21 - n) = 4.20 Solve for n, number of dimes 21 - n = number of quarters

**7th Math**

Correct!! Good job!

**7th Math**

70 words in 2 min = 70/2 = 35 wpm 120 words in 3 min = 120/3 = 40 wpm wpm = words per min Can you answer now?

**calculus**

Verify this equation, y = 4^x-1 You need parentheses. Is it, y = 4^(x - 1)? Or, y = 4^(x) - 1? Or ?

**Geometry/Trig.**

angle A = 45 deg Special 45-45-90 deg triangles have sides in the ratio of 1:1:(sqrt(2)) OR ratio n : n : n(sqrt(2)) This means, in this problem, side a = 1 (opposite side) side b = 1 (adjacent side) side c = 1*(sqrt(2)) (hypotenuse) tan A = a/b = op/adj tan 45 = ?

**Calculus**

Verify this equation, y = 4^x-1 You need parentheses. Is it, y = 4^(x - 1)? Or, y = 4^(x) - 1? Or ? Are you Jamal? Please don't change screen names. And, which is it? In this problem, rotation is about the x-axis. In the 'Jamal' problem, rotation is about the y-axis.

**calculus**

Check your problem. Does the problem state between x = a and x = b?

**Intermediate Accounting**

For compounded annually R = rate, n = number of years FV = orig investment * ((1 + R)^n) 1,000,000 = 182,696 * (1 + R)^15 5 = (1 + R)^15 (15th root(5)) = 1 + R 1.11 = 1 + R .11 = R please check my math

**math**

D = RT Distance = Rate x Time T = D/R R = D/T

**trig**

x = 225 degrees

**trig**

Do you mean -(sqrt(2))/2 ?

**Geography 7**

The usual term for the place where two (or more) rivers meet is "confluence". From wiki answers dot com

**Math(Please check)**

derivative of f(x)=7x-19 at x=2 f'(x) = 7 f'(2) = 7

**science**

"The moon is much smaller than the earth. As a result, the force of gravity on the moon is only about one sixth as strong as gravity on earth. Gravity is what holds us down on the earth's (or moon's) surface. If you were to weigh yourself on a scale here on earth ...

**Chemistry**

If you would like a timely answer to your post, please post your school subject in the "School Subject" box.

**Physics**

See the first link below under Related Questions. A somewhat similar problem was answered. The link might be helpful if no one else answers.

**geometry**

s = side of square P = 4s 30 <= 4s <= 64 30/4 <= s <= 16 15/2 <= s < 16

**mat/116**

Try to solve these inequalities first. Compound inequalities with 'Or', are solved separately and the solutions have 'or' between them. Example. If the solution to the first was x < 2 and the solution for the second was x > 4, then the solution would be, ...

**Math**

Thanks so much MathMate!!

**Math**

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? Thanks in...

**Algebra**

194 * 10^3 = 194,000 Scientific notation 1.94 x 10^5

**Math**

Since, the problem states to use R and C for the equation, change the x to C. So, the equation would be, R = 1.4C - 7 Instead of, R = 1.4x - 7

**Math**

A.) Cost 85, Retail 112 Cost 175, Retail 238 For the equation (x,R), x = cost (85,112), (175,238) Since linear, use y = mx + b R = mx + b slope m = 238 - 112/(175 - 85) slope m = 126/90 = 1.4 R = 1.4x + b To find b, plug in (85,112) 112 = 1.4(85) + b 112 = 119 + b b = -7 R = 1...

**trig**

Leave in radical form means don't simplify the sqrt (radical) to exact value. Example, exact value of (sqrt(2))= 1.4142 All your answers are correct. Always simplify radicals, ie,(like you did), but wasn't sure, (sqrt(52)) = 2(sqrt(13)) don't leave as (sqrt(52)) (...

**MATH: Pre-Cal/Trig**

A = wL x = width of garden x + 6 = length of garden Area of garden = x(x + 6) x + 6 = width of garden and walkway x + 6 + 6 = x + 12 = length of garden and walkway Area of garden and walkway = (x + 6)(x + 12) Area of garden and walkway - 288 = area of garden (x + 6)(x + 12) - ...

**algebra**

Commutative Property (think commute or move around)is the one that refers to moving stuff around. For addition, the rule is a + b = b + a From purplemath dot com

**Math**

Assuming you mean 4 - 7^(2x) = 1 7^(2x) = 3 Take logarithm to base 7 of both sides 2x log 7 = log 3 x = log 3/(2 log 7) x = 0.4771/(2 * 0.8451) x = 0.4771/1.6902 x = 0.2823