Sunday

February 7, 2016
Total # Posts: 1,926

**math**

(ab^8)*(a^5)*(b^6) To multiply, just add the exponents of those terms with the same base: = a^(1+5) * b^(8+6) = (a^6)(b^14) Hope this helps~ :3
*October 2, 2013*

**Intermediate Algebra**

3 squareroot(13) + 7 squareroot(13) Note that you can only add or subtract terms with radicals if they have the same radicand (expression inside the radical sign) and same root (square root, cube root, fourth root, etc.) Therefore, it becomes = 10 squareroot(13) Hope this ...
*October 2, 2013*

**8th Grade Physical Science**

Recall that the formula for density is d = m/V where m is the mass and V is the volume. Substituting, d = 30/7500 d = 0.004 g/cm^3 Hope this helps~ :3
*October 1, 2013*

**math**

Note that 0.7 is also 7/10. The given are 1/4, 7/10, 3/5 What you can do here is first find the LCD (Least Common Denominator) or the smallest number where it is divisible by 4, 10 and 5. By looking, we can say that the LCD = 20. Then we convert each fraction at which their ...
*October 1, 2013*

**Math**

134n + 55
*October 1, 2013*

**Math**

We let the unknowns using variables: Let n = number of quarters Let k = number of dimes Note that the sum or total of quarters and dimes is 47. Therefore, we can say that n + k = 47 Since we need to find the number of dimes (which is k) in terms of umber of quarters (that is n...
*October 1, 2013*

**Math**

q + 49
*October 1, 2013*

**Math**

Let w = width Let 2w - 5 = length (according to first statement) Then we set up the equation. Recall that the perimeter of a rectangle is equal to P = 2L + 2W where L is length and W is width. Thus, 26 = 2(2w - 5) + 2w We solve for x: 26 = 4w - 10 + 2w 26 = 6w - 10 36 = 6w w...
*October 1, 2013*

**Math**

Note that the difference between two consecutive integers is equal to 1. Thus, Let x = first number Let x+1 = the second number Then we set up the equation. It says in the problem that their sum is 59, so x + x + 1 = 59 Finally we solve for x: 2x + 1 = 59 2x = 59 - 1 2x = 58 (...
*October 1, 2013*

**Math**

Recall the formula to convert degree Fahrenheit to degree Celsius: C = (5/9)*(F - 32) Substituting, C = (5/9)*(-4 - 32) C = (5/9)*(-36) C = -20 deg Celsius Hope this helps~ :3
*October 1, 2013*

**algebra 1**

First represent the unknowns with variables. Note that the difference between two consecutive integers is one, so: Let x = first integer Let x+1 = second integer Let x+2 = third integer Let x+3 = fourth integer Then we set up the equation by following the given condition. x + ...
*October 1, 2013*

**maths**

Substitute (a,a) to x and y: a = -2a + 27 3a = 27 a = 9 Hope this helps~ :3
*September 30, 2013*

**chemistry**

Molarity is a measure of concentration of a solution. It is equal to moles of solute per one liter of solution, or M = n/V units is in mol/L. hope this helps :3
*September 30, 2013*

**Math**

I'll just write some definitions first: * Mixed numbers are composed a whole number and a fraction, for example, 4 4/5 * Improper fractions are fractions whose numerator is greater than the denominator, for instance, 8/3. * Numerator is the number above the bar line of a ...
*September 30, 2013*

**You're welcome! :)**

You're welcome! (◕‿◕✿)
*September 30, 2013*

**Chem**

Let M1 be the concentration of the stock solution. Recall the formula relating molarity and volume: M1 * V1 = M2 * V2 where V1 = initial volume V2 = final volume M2 = final concentration Substituting, M1 * (15.0 mL) = (700 mL) * M2 We solve for M2: M2 = M1 * 15/700 M2 = 0.0214...
*September 30, 2013*

**math**

Because those students who have a sister probably have a brother also or vice versa. So it's like they are counted twice. So naturally the count would be greater than the actual number of students. I'll give you an example. For instance, Marshall has 14 classmates. 5/7...
*September 30, 2013*

**math**

Because those students who have a sister probably have a brother also or vice versa. So it's like they are counted twice. So naturally the count would be greater than the actual number of students. I'll give you an example. For instance, Marshall has 14 classmates. 5/7...
*September 30, 2013*

**math**

First convert feet to inches: 2 1/2 = 5/2 feet 5/2 feet * 12 inches / 1 foot = 30 inches Then we divide this by 9/16 inch: 30 / (9/16) = 30 * 16 / 9 = 160 / 3 = 53 1/3 We only need the whole number (because the number of DVDs cannot be a fraction or decimal). Therefore, 53 ...
*September 30, 2013*

**math**

T = 1/f We solve for f. What we can do here is to get the reciprocal of both sides to get f: reciprocal of T: 1/T reciprocal of 1/f: f Therefore 1/T = f, or f = 1/T
*September 30, 2013*

**math**

I interpreted the inequality as 0.3(0.3x + 0.8) < -0.3 What we'll do here is to solve for x, like what we do in equations: 0.3(0.3x + 0.8) < -0.3 0.09x + 0.24 < -0.3 0.09x < -0.3 - 0.24 0.09x < -0.54 x < -0.54/0.09 x < -6 Hope this helps~ :3
*September 30, 2013*

**math**

Yes, that's right, because notice that the numbers are in harmonic sequence.
*September 29, 2013*

**math**

Yes, that's correct. :)
*September 29, 2013*

**math**

Note that 3x / x = 3, thus 3 * (2x / 6) = 6x / 6 = x
*September 27, 2013*

**Dma 040**

Since we're given the values of V and h, we'll solve for a: V = (1/3)ah 3V = ah 3V/h = a a = 3V/h a = 3*21 / 3 a = 21 hope this helps :3
*September 27, 2013*

**Dma 040**

Since we're given the values of V and h, we'll solve for a: V = (1/3)ah 3V = ah 3V/h = a a = 3V/h a = 3*21 / 3 a = 21 hope this helps :3
*September 27, 2013*

**Dma 040**

Represent the unknowns with variables: Let x = width Let 2x + 7 = length (according to the first statement) Then we set up the equation. To set up, we need to recall that the perimeter of a rectangle is given by P = 2L + 2W where L is length and W is width. We know that P = ...
*September 27, 2013*

**Algebra I**

All answers are correct. :)
*September 27, 2013*

**Calculus**

limit of (sin^2 (x))/(x^2 - 1) as x -> infinity Note that the range of values of sin x is from -1 to 1, for all real values of x. Thus the range of sin^2 (x) is only from 0 to 1 (as any real number squared results to greater than or equal to zero). Now, for the denominator...
*September 27, 2013*

**Calculus-correction**

*oops I made a mistake on x->(pi)- means that x approaches pi (=3.14159) at the LEFT side (thus it is SMALLER than pi, for instance 3.140) But the answer & other explanations are still the same. :)
*September 27, 2013*

**Calculus (first year uni)**

First, we get the limit of cot(x) as x->(pi) only. Note that cot(x) is also equal to cos(x)/sin(x). Thus, lim cot(x) as x->pi lim (cos(x))/(sin(x)) = cos(pi) / sin(pi) = -1 / 0 = infinity Now we know that it approaches infinity, but we're not sure of the sign whether...
*September 27, 2013*

**calculus**

I think you mean f(x) = 3 + e^(4−x) To get the inverse, replace the f(x) by x, and the x by f'(x), then solve for f'(x): f(x) = 3 + e^(4−x) x = 3 + e^(4 - f'(x)) x - 3 = e^(4 - f'(x)) ln(x - 3) = 4 - f'(x) f'(x) = 4 - ln(x - 3) This is the ...
*September 27, 2013*

**algebra**

A < C A + C = 27 M = A + 19 Note that from the third relationship, to maximize M, we also have to maximize A. From the second relationship, we want A to be maximize in a way that it is still less than C. Thus the maximum possible integer for A = 13, so that C = 14. Thus, M...
*September 27, 2013*

**algebra**

There might have been some typos in your question, so I interpreted it as ((5x^2-16x+3)/(5x^2+24x-5))*((15x^2-8x+1)/(3x^2+14x-5)) We factor each quadratic equation inside the parenthesis, and simplify. ((5x^2-16x+3)/(5x^2+24x-5))*((15x^2-8x+1)/(3x^2+14x-5)) ((5x-1)(x-3)/(5x-1...
*September 26, 2013*

**chemistry**

First we get the amount (the mass, specifically) of calcium chloride needed. Mass is related to number of moles. Recall that molarity (M) is just number of moles (n) divided by the volume (V) in liters: M = n/V Therefore, n = MV n = (0.15 M)(0.2 L) n = 0.03 moles Now, to get ...
*September 26, 2013*

**algebra**

Note that when (8+9x) and (8-9x) are multiplied, (8+9x)(8-9x) = 64 + 72x - 72x - 81x^2 = 64 - 81x^2 Thus the least common multiple is 64 - 81x^2 hope this helps~ :3
*September 26, 2013*

**Calculus**

Both are correct. (The variation in the answers depends on what "u" to be substituted) Integral (sec^2 (x) tan x) dx This can be rewritten as: Integral (sec(x)*sec(x)*tan(x)) dx Here we use substitution. We let u = sec(x) du = sec(x)*tan(x) dx Substituting, Integral...
*September 26, 2013*

**Algebra**

Step 1 & 2 are right. She made the first mistake in Step 3, it should be 2 + 10 = 2y 12 = 2y And so the succeeding steps are wrong too. But the earliest was in step 3. hope this helps :3
*September 25, 2013*

**Math**

3a^3 + 4 - 4a - 2a^3 + 6 + 12a - b^3 Before we simplify this, I'll just write some terms: *Variable: in this case, the variables are a and b *Numerical coefficient: the number before the variables *Exponent: number raised to certain term *Constant: the numbers (w/o ...
*September 25, 2013*

**Geometry**

When it is rotated about its diameter, the shape formed is a sphere. :)
*September 24, 2013*

**Calculus**

Yep, not continuous at x = -8. If you graph the function, it approaches (+) and (-) infinity at x = -8. To prove, we get the lim as x -> (-8)+ (approaching -8 from the right side) and as x -> (-8)- (approaching -8 from the left side) lim |x−8| / (x+8) as x -> (-...
*September 24, 2013*

**Calculus-correction**

*oops sorry, I mean x = -8.
*September 24, 2013*

**Calculus**

f(x)= |x−8| / (x+8) The function is discontinuous only at x = 8 since it will yield a denominator equal to zero: f(8) = |8-(-8)| /-8+8 f(8) = 16/0 x = 8 is an asymptotic discontinuity. Hope this helps~ :3
*September 24, 2013*

**Algebra II**

The original function is k(x) = x^2. Provided that c cannot be equal to zero, we'll compare the following to the original position of the given function: 1. k(x+c) = (x+c)^2 The graph moves c units to the left is c is (+) and c units to the right if c is (-). 2. k(x) + c...
*September 24, 2013*

**Math!!!**

#32. n is any nonzero number. n*n = n^2 Therefore it is always (+), regardless of the sign of n. #33. If y is (-), (-y)(-y)(-y) = (-1)^3 * (y^3) = -(y^3) Therefore the sign is (-). #41. Since it is depth (it went down), from the origin it is: -40,230 I think you can do the ...
*September 24, 2013*

**chemistry**

First, we get the molar masses to the CuCl2 and H2O. Just get a periodic table and add the individual masses of elements in the chemical formula: CuCl2: 63.55 + 2*35.45 = 134.45 H2O: 2*1 + 1*16 = 18 Then we get their moles. We divide the mass by the molar mass to get the moles...
*September 24, 2013*

**Pre algebra**

Let x = number It was said in the first statement that the number is multiplied by itself and then by itself again. Thus, it was multiplied by itself thrice: x*x*x = -1000 x^3 = -1000 We get the cuberoot of this, so that we can get x alone on the left side: cuberoot(x^3) = ...
*September 24, 2013*

**math**

Formula for getting an interior angle of a regular polygon with n sides: I = 180(n-2)/n Substituting, I = 180(18-2)/18 I = 160 degrees Hope this helps~ :3
*September 24, 2013*

**Calculus**

Your answer is actually correct. :) d/dx (6/ln(x)) d/dx (6*(ln(x))^(-1)) = 6(-1)(1/x)(ln(x))^2 = -6/(x*(ln(x))^2)
*September 24, 2013*

**chemistry**

First, we have to get the molar mass of aniline. Just get a periodic table and add the individual masses of the elements in the chemical formula: C6H5NH2: 6*12 + 5*1 + 1*14 + 2*1 = 93 g/mol Then we get the mass of aniline using the given density and volume. Recall that density...
*September 23, 2013*

**Chemistry**

Nope, you can't directly convert the 1.27 g sample to moles of Mg because it is impure or not 100% Mg. Since there is some HCl left after the reaction, the impure Mg is the limiting reactant and HCl is in excess. Note that the Mg used was impure. To get the number of moles...
*September 22, 2013*

**Math**

#1. Not necessarily. For example, a = -5 and b = -3 |a| = 5 |b| = 3 |a| is greater than |b|, but -5 is NOT greater than -3. #2. Opposites are numbers which have the same distance (numerical value) from zero but different in directions (opposite signs). An example would be -5 ...
*September 22, 2013*

**Calculus**

lim (x^4-5x^3+7x^2-6x+3)/(x-1) as x->1 Note that if we substitute 1 to the function, the denominator becomes zero (and we don't want that). But take note that the numerator can be factored: lim (x-1)(x^3 - 4x^2 + 3x - 3) / (x-1) Thus the x-1 will be cancelled, and we&#...
*September 22, 2013*

**math**

If that's already the question, then yes. :3
*September 22, 2013*

**8th G-Math**

This means that the number of students did not exactly fill the total capacity of the 7 buses, because there are 6 who had to travel in cars. What we'll do here is first, we subtract the 6 "extra" students from the 405, so that we'll know the exact, total ...
*September 22, 2013*

**Math**

Represent the unknown with variable. Let x = time that Steve's brother travelled Recall that distance is equal to speed multiplied by time. We get their distances travelled and equate them (since it's said that they followed the same route and they'll overtake at ...
*September 22, 2013*

**maths**

Note that you can factor out a(a+b) from the two terms: a(a+b) * (a+b - 2b) Thus, a(a+b)(a-b) Hope this helps~ :3
*September 22, 2013*

**Algebra Answer Check**

Yup, they are all correct. :)
*September 21, 2013*

**Chemistry stoch1**

First we write the balanced chemical reaction involved: 3Fe + 4H2O -> Fe3O4 + 4H2 Since we have 18 g of steam, we have to convert this to moles and use the stoich ratios from the reaction to get amount of Fe needed to react with it. To convert mass to moles, we get the ...
*September 21, 2013*

**a**

0 > x^2 + 5x - 2 We can also rewrite this as x^2 + 5x - 2 < 0 First thing to do is find the roots of the equation. Since the quadratic equation is not factorable in just one look, we use the quadratic formula: x = ( -b +/- sqrt(b^2 - 4ac) ) / 2a Therefore, x = ( -5 +/- ...
*September 21, 2013*

**Math**

Note that when two lines are parallel, their slopes are equal. The given equation is 4x - 5y = 8. To get its slope, we change it to the form y = mx + b where m is the slope and b is the y-intercept. Therefore, 4x - 5y = 8 -5y = -4x + 8 y = (4/5)x - 8/5 The slope is equal to 4/...
*September 20, 2013*

**Geometry**

Note that we can form a right triangle here, with base equal to 100 ft and angle between hypotenuse and base equal to 48°. Let h = height of triangle, which is also equal to total height of statue minus the 5 ft elevation of the device. Thus, tan 48° = h / 100 h = 100...
*September 20, 2013*

**Geometry**

To get the distance, use the distance formula: d = sqrt((x2 - x1)^2 + (y2 - y1)^2) Assuming the point where the home lies is at the origin (0,0), thus the beach lies at (120, -30). Substituting, d = sqrt((120 - 0)^2 + (-30 - 0)^2) d = sqrt(14400 + 900) d = sqrt(15300) d = 123....
*September 20, 2013*

**Geometry**

Angle of depression is the angle below the horizontal that an observer must look in order to see an object below him. If you draw the figure, you can actually see that the hot-air balloon is located 25° above the horizontal. We actually formed a triangle here, with height ...
*September 20, 2013*

**Geometry**

It's easier if you drew the figure, but it's hard to draw figures here so I'll just describe it. :3 Note that the woman is 15 ft from the statue, and she looks up at an angle of 60° in order to see the top of statue. From here we can actually form a right ...
*September 20, 2013*

**MATH**

Let x = the stones that Eunice must take from Esther in the third round in order to be declared winner At start, Eu: 20 Es: 20 After first round, Eu: 20 + 5 = 25 Es: 20 - 5 = 15 After second round, Eu: 25 - 3 = 22 Es: 15 + 3 = 18 After third round, Eu: 22 + x = 30 Therefore, x...
*September 20, 2013*

**geometry**

I think we need to see the figure, but looking at the given, I think the point FG bisects and intersects BT at point O. Therefore we can say the lengths of segments BO and OT are equal, or 7x - 6 = 5x + 10 7x - 5x = 10 + 6 2x = 16 x = 8 Susbtituting, BO = 7x - 6 BO = 7(8) - 6 ...
*September 19, 2013*

**MATH**

Mira: 20 Noreen: 20 Olivia: 20 After they give pretzels, M: 20 - p N: 20 + p + q O: 20 - q What we can do here is add all of them and equate them to the sum of the ratio multiplied by a certain factor, say x: (20 - p) + (20 + p + q) + (20 - q) = (5+9+6)x The p's and q'...
*September 17, 2013*

**calculus**

y = (5e^x)/(cos x) Since 1/cos(x) = sec(x), we can also rewrite this as (5e^x)(sec(x)) Since two terms which are both functions of x are multiplied, we use the chain rule. Thus it becomes: (5e^x)(sec(x)) + (5e^x)(tan(x) * sec(x)) Simplifying, dy/dx = (5e^x)(sec(x))(1 + tan(x...
*September 17, 2013*

**calculus**

y = (sin x)^-1 This can also be rewritten as y = 1/(sin x) y = csc x Therefore, dy/dx = -cot(x) * csc(x) Hope this helps~ :3
*September 17, 2013*

**pre calcalus**

(x+4)^(2/3) = 9 To do this, we raise both side by 3/2, so that the exponent 2/3 of the term on the left side will be cancelled: (x + 4)^(2/3 * 3/2) = 9^(3/2) (x + 4)^(1) = 3^3 x + 4 = 27 x = 27 - 4 x = 23 To check, substitute the x value to the original equation: (23 + 4)^(2/3...
*September 16, 2013*

**math**

(4x)^(2/3) = (30x+4)^(1/3) To do this, note that it's much easier to work with whole number exponents. This we raise both side terms by 3, so that the denominator 3 will be cancelled: (4x)^(2/3 * 3) = (30x+4)^(1/3 * 3) (4x)^2 = (30x+4)^1 16x^2 = 30x + 4 Solving for x, 8x^2...
*September 16, 2013*

**AP Calculus**

f(x) = | (x)(x-3) / (9 - x^2) | (a) Domain & Zeroes of f? Domain is the set of all possible values of x. In the given function, note that the denominator can not be equal to zero, because any number divided by zero results to indeterminate (if 0/0) or infinity (if any non-zero...
*September 16, 2013*

**Physics**

R = a*t, or a = R/t Units of R = m^3 / s Units of t = s Thus, a = (m^3 / s) / s a = m^3 / s^2
*September 16, 2013*

**Math :(**

2b = b + 2 + b 2b = 2b + 2 We can see here that the 2b will be cancelled from both sides, and we're left with, 0 = 2 which is not possible. Thus there is no solution. Hope this helps~ :3
*September 16, 2013*

**math**

Recall that the perimeter of a square is equal to P = 4*s where s = length of one side Therefore, 80 = 4*s s = 80/4 s = 20 meters We need to find the area. Recall that the area of a square is just A = s^2 Substituting, A = 20^2 A = 400 m^2 Hope this helps~ :3
*September 16, 2013*

**Algebra Homework**

First we find the slope of the given points: m = (y2 - y1)/(x2 - x1) Substituting, m = (0 - (-2))/(-5 - k) m = 2/(-5 - k) Then, we get the slope of the given line. y = (5/9)x − 2 Note that it follows the form y = mx + b, where m is the slope and b is the y-intercept. ...
*September 16, 2013*

**Math**

2(4m + 6) = 8m + 6 8m + 12 = 8m + 6 Note that from here, we can see that there is no solution. The 8m will be cancelled from both sides, and we are left with 12 = 6 which is impossible. Thus, there is no solution, or there is no value of m that can satisfy the equation. Hope ...
*September 16, 2013*

**math**

If you mean √(2x - 7) + 8 = 11 Then, first we isolate the whole squareroot term on one side of equation: √(2x - 7) = 11 - 8 √(2x - 7) = 3 Then we square both sides: 2x - 7 = 9 2x = 9 + 7 2x = 16 x = 8 Note that if we're dealing with squareroots, we always...
*September 16, 2013*

**algebra**

What do you want to solve specifically? If you want to solve for x, V = 4/3 πx^3 4/3 πx^3 = V x^3 = V(3/(4π)) x = cuberoot( 3V/(4π))
*September 16, 2013*

**algebra**

I'm not sure if this is the same with the other post, but I'll just paste it here. If you mean √(2x - 7) + 8 = 11 Then, first we isolate the whole squareroot term on one side of equation: √(2x - 7) = 11 - 8 √(2x - 7) = 3 Then we square both sides: 2x...
*September 16, 2013*

**Math simplifying mixed radicals**

To do this, you have to factor the radicand (or the number inside the radical sign) and look for perfect squares. For instance, 2 * √(48) 2 * √(16*3) 2 * √(4*4*3) Express the repeating factors using exponents, so it's easier to see. Since four is ...
*September 14, 2013*

**Math simplifying mixed radicals**

To do this, you have to factor the radicand (or the number inside the radical sign) and look for perfect squares. For instance, 2 * √(48) 2 * √(16*3) 2 * √(4*4*3) Express the repeating factors using exponents, so it's easier to see. Since four is ...
*September 14, 2013*

**Math simplifying mixed radicals**

Hi! Just to clarify, are those numbers on the left (the 2, 3, 6, 3, etc.) are multiplied with the squareroot terms or are written as small number which is therefore part of the radical sign?
*September 14, 2013*

**Math**

Represent the unknowns with variables. Let x = total amount of Muffins sold in dollars Let (4 1/2)x = total amount of Doughnuts sold in dollars (according to the first statement) Then we set up the equation. Since their total is $44,000: x + (4 1/2)x = 44000 Then we solve for ...
*September 14, 2013*

**chemistry**

First, we write the balanced chemical equation involved. Since the reaction is synthesis of NH3, N2 + 3 H2 -> 2 NH3 Since N2 is excess, H2 is limiting and we therefore use its moles to determine the amount of NH3 produced. In the equation, there are 2 moles of NH3 produced ...
*September 14, 2013*

**math**

Domain of what? If the required is their individual domains: 1. For f(x) = 1/(x^2 - 8x - 9) Note that domain is the set of all possible values of x. In the function, note that the denominator must not be equal to zero because 1/0 is infinity. Therefore, we find the values of x...
*September 14, 2013*

**math**

What is required to find? :3
*September 14, 2013*

**Radius Question Geometry(college level)**

I'm not sure if there is a given figure for this problem, but if the three separate circles are tangent with the other with their centers aligned (or can be connected by a straight line), then yes, you get 60 cm for the diameter of the new, bigger circle which ...
*September 14, 2013*

**calculus**

lim (x^2 + 6x + 5)/(x^2 - 3x - 4) as x-> -1 Not that we can factor both numerator & denominator, lim (x+5)(x+1) / (x-4)(x+1) We can thus cancel the x+1, leaving lim (x + 5)/(x - 4) as x-> -1 Substituting x = -1, = (-1 + 5) / (-1 - 4) = 4 / -5 = -4/5 Hope this helps~ :3
*September 14, 2013*

**Math**

Recall the point-slope form of an equation: y - y1 = m(x - x1) where m = slope (x1, y1) = point on the line Substituting, y - 6 = -8(x - 4) y - 6 = -8x + 32 y = -8x + 38 (slope-intercept form), or 8x + y = 38 (standard form), or 8x + y - 38 = 0 (general form) Hope this helps~ :3
*September 13, 2013*

**MATH**

Recall the formula for slope of a line: m = (y2 - y1) / (x2 - x1) where (x1, y1) and (x2, y2) are the points on the line Substituting, m = (4 - 2) / (3 - (-1)) m = 2 / (3+1) m = 2/4 m = 1/2 Hope this helps~ :3
*September 13, 2013*

**Math**

Recall the formula for slope of a line: m = (y2 - y1) / (x2 - x1) where (x1, y1) and (x2, y2) are the points on the line Substituting, m = (9 - 5) / (4 - 3) m = 4/1 m = 4 Hope this helps~ :3
*September 13, 2013*

**Maths**

Hmm not sure if this can be accepted: 4 + (4-4)/4 ..but at least it has four 4's. XD
*September 13, 2013*

**Maths**

9*9+9+9+(9/9) ...six 9's. XD I'm not sure how if only four 9's should be used with normal math operations. Hmm...
*September 13, 2013*

**Maths**

9+9+(9+9)/9 lol there are five 9's. XD I'm not really sure how if there are only four 9's. :3
*September 13, 2013*

**Math**

If you mean that the a regular 40-sided polygon, recall that the formula for total number of diagonals of a polygon with n sides is, D = n(n-3)/2 Therefore, D = 40(40-3)/2 D = 740 diagonals Hope this helps~ :3
*September 13, 2013*

**Math - Factoring**

I think you forgot to type the choices. But anyway, you just have to apply some exponential rules and division rules: *When 2 is raised with an integer (greater than 1), the last digit of the number has a repeating pattern of 2, 4, 8, 6. *A number is divisible by 10 if the ...
*September 13, 2013*

**Math - Polygons**

Recall that the formula to find the measure of one interior angle of a polygon with n sides is, I = 180(n-2)/n Substituting, 150 = 180(n-2)/n 150n = 180n - 360 -30n = -360 n = 12 sides Hope this helps~ :3
*September 10, 2013*

**mathssssSsssss**

#1. Note that if you draw a broken line corresponding to the height of the parallelogram, you would form a right triangle in which the hypotenuse is 10 cm and one of the angles is 55 degrees. We can actually solve for the height, which is equal to 10 * sin (55) = 8.19 cm A of ...
*September 10, 2013*