Monday

October 24, 2016
Total # Posts: 2,238

**Math**

Substitute the values a = 4 , b = - 9 , c = - 9 into the quadratic formula x1/2 = [ - b +OR- sqroot( b ^ 2 - 4 a c ) ] / 2 a x1/2 = [ - ( - 9 ) +OR- sqroot( ( - 9 ) ^ 2 - 4 * 4 * ( - 9 ) ) ] / 2 * 4 x1/2 = [ 9 +OR- sqroot( 81 - 4 * ( - 36) ) ] / 8 x1/2 = [ 9 +OR- sqrt ( 81 + ...

*January 29, 2016*

**Math**

1 / 4 = 1 * 8 / ( 4 * 8 ) = 8 / 32 5 * 16 = 5 * 2 / ( 16 * 2 ) = 10 / 32 Your answer is correct.

*January 26, 2016*

**Algebra**

2 y - 8 = 3 y - 18 Subtract 2 y to both sides 2 y - 8 - 2 y = 3 y - 18 - 2 y - 8 = y - 18 Add 18 to both sides - 8 + 18 = y - 18 + 18 10 = y y = 10

*January 25, 2016*

**Math**

[ ( 8.3 + x ) / 11.2 ] * 8 ) = 16 Divide both sides by 8 [ ( 8.3 + x ) / 11.2 ] * 8 ) / 8 = 16 / 8 ( 8.3 + x ) / 11.2 = 2 Multiply both sides by 11.2 11.2 * ( 8.3 + x ) / 11.2 = 2 * 11.2 8.3 + x = 22.4 Subtract 8.3 to both sides 8.3 + x - 8.3 = 22.4 - 8.3 x = 14.1

*January 24, 2016*

**Math**

12 : 18 = 2 * 6 : ( 3 * 6 ) = 2 : 3 2 : x = 2 : 3 x = 3 Answer A 5 : 15 = 5 : ( 3 * 5 ) = 1 : 3 1 : 3 = x : 3 x = 1 Answer C

*January 21, 2016*

**math**

Did you read my answer?

*January 21, 2016*

**math**

r = first number r + 1 = second number r + 2 = third number r + r + 1 + r + 2 = 144 3 r + 3 = 144 Subtract 3 To both sides 3 r + 3 - 3 = 144 - 3 3 r = 141 Divide both sides by 3 r = 141 / 3 = 47 r + 1 = 48 r + 2 = 49 47 + 48 + 49 = 144

*January 21, 2016*

**Math**

75 % = 75 / 100 = 0.75 L = 124 ft W = 0.75 * L = 0.75 * 124 = 93 ft P = 2 L + 2 W = 2 ( L + W ) = 2 * ( 124 + 93 ) = 2 * 217 = 434 ft A = L * W = 124 * 93 = 11,532 ft ^ 2

*January 21, 2016*

**Maths**

L = 3 W d = sqroot ( L ^ 2 + W ^ 2 ) d = sqroot [ ( 3 W ) ^ 2 + W ^ 2 ] = sqroot ( 9 W ^ 2 + W ^ 2 ) = sqroot ( 10 W ^ 2 ) = 6 * sqroot ( 10 ) sqroot ( 10 ) * W = 6 * sqroot ( 10 ) Divide both sides by sqroot ( 10 ) W = 6 cm L = 3 W = 3 * 6 = 18 cm P = 2 L + 2 W = 2 ( L + W...

*January 21, 2016*

**Math**

y - 2 = 6 x + 3 Subtract 6 x + 3 to both sides y - 2 - ( 6 x + 3 ) = ( 6 x + 3 ) - ( 6 x + 3 ) y - 2 - 6 x - 3 = 0 y - 6 x - 5 = 0

*January 21, 2016*

**math**

1 h = 60 min Speed = ( 4 / 5 ) mile * 60 min / 9 min Speed = ( 4 / 5 ) * 60 / 9 = 4 * 60 / 5 * 9 = 240 / 45 = 2 * 2 * 2 * 2 * 3 * 5 / ( 3 * 3 * 5 ) = 2 * 2 * 2 * 2 / 3 = 16 / 3 miles / hour

*January 21, 2016*

**Math**

150 % = 150 / 100 = 1.5 1.5 * 25,800 = 38,700

*January 13, 2016*

**Algebra**

In google type : functions graphs online When you see list of results click on : Draw Function Graphs - Plotter - Rechneronline When page be open in blue rectangle type : x + 3 In gray rectangle type : - 2 x - 3 Then click option : Draw Solution : x = - 2 , y = 1

*January 13, 2016*

**Math 10**

1 yd = 91.44 cm 5 yd = 5 * 91.44 = 457.2 cm 457.2 cm / 50 cm = 9.144 = 9 + 0.144 pieces 9 pieces + 0.144 * 50 cm = 9 pieces + 7.2 cm

*January 5, 2016*

**Math**

b ) ( 2 / 5 ) ^ 3 = 8 / 125

*January 5, 2016*

**Math**

If two polygons are similar, the ratio of their areas is equal to the square of the ratio of their corresponding sides. If two polygons are similar, the ratio of their volumes is equal to the cube of the ratio of their corresponding sides. a) ( 1 / 4 ) ^ 2 = 1 / 16 b ) ( 2 / 5...

*January 5, 2016*

**Maths**

As = Area of the smaller triangle = 28 square Al = Area of the larger triangle In two similar triangles, the ratio of their areas is the square of the ratio of their sides. As = Al * ( 2 / 5 ) ^ 2 As = Al * 4 / 25 As = 4 Al / 25 Multiply both sides by 25 25 As = 4 Al Divide ...

*January 4, 2016*

**Algebra! Errr, whatever it is.**

j = r b Divide both sides by b j / b = r r = j / b Answer d M = 300 J / P Multiply both sides by P P M = 300 J Divide both sides by 300 P M / 300 = J J = P M / 300 Answer d

*January 4, 2016*

**Math**

P2 = second pile

*December 23, 2015*

**Math**

P1 = first pile P3 = second pile P3 = third pile The first has 5 more books than the 2nd pile. This mean : P1 = P2 + 5 The number of books in the second pile is twice the number of books in the third pile. This mean : P2 = 2 P3 So if : P2 = 2 P3 and P1 = P2 + 5 then : P1 = P2...

*December 23, 2015*

**Math**

Type mistake. y = - 2 x - 12 = - 2 * ( - 8 ) - 12 = 16 - 12 = 4

*December 18, 2015*

**Math**

y = - 2 x - 12 = - 2 * ( - 8 ) - 2 = 16 - 12 = 4

*December 18, 2015*

**Math**

3 x + 4 ( x - 6 ) - 3 ( x - 7 ) 3 x + 4 * x + 4 * ( - 6 ) - 3 * x - 3 * ( - 7 ) = 3 x + 4 x - 24 - 3 x + 21 = 4 x - 3 Answer B

*December 18, 2015*

**Math**

- 6 - 7 ( c + 10 ) = - 6 - 7 * c - 7 * 10 = - 6 - 7 c - 70 = - 76 - 7 c Answer B

*December 18, 2015*

**Maths plz help**

x + y = 5 Possible combinations : x = 1 , y = 4 x = 2 , y = 3 x = 3 , y = 2 x = 4 , y = 1 x = 1 , y = 4 x ^ x + y ^ y = 31 1 ^ 2 + 2 ^ 2 = 31 1 + 4 = 31 Incorrect. x = 2 , y = 3 x ^ x + y ^ y = 31 2 ^ 2 + 3 ^ 3 = 31 4 + 27 = 31 Correct. x = 3 , y = 2 x ^ x + y ^ y = 31 3 ^ 3...

*December 18, 2015*

**math**

C = Present Chase's age R = Present Rosa's age Chase is 34 years younger than Rosa. This mean : C = R - 34 8 years ago, Rosa's was R - 8 yrs , Chase was C - 8 yrs 8 years ago, Rosa's age was 3 times Chase's age. This mean : R - 8 = = 3 ( C - 8) R - 8 = 3 * ...

*December 18, 2015*

**Math**

a = apples o = oranges 1 week : a + o = 108 2 week : 5 a + 3 o = 452 Now you must solve system of 2 equations with 2 unknown : a + o = 108 5 a + 3 o = 452 The method of substitution: a + o = 108 Subtract o to both sides a + o - o = 108 - o a = 108 - o 5 a + 3 o = 452 5 * ( 108...

*December 18, 2015*

**math**

Convert the numbers in decimal form. 2 / 3 = 0.6666 65 % = 65 / 100 = 0.65 7 / 10 = 0.7 Order : 0.64 , 65 % , 2 / 3 , 7 / 10

*December 18, 2015*

**Math**

My type mistake. s = ( 100 + 250 + 275 ) / 2 = 625 / 2 = 312.25 m

*December 11, 2015*

**Math**

Heron's Formula for the area of a triangle : A = sqrootÿ[ s ( s - a ) ( s - b ) ( s - c ) ] s is half the perimeter . s = ( a + b + c ) / 2 a = ( 100 + 250 + 275 ) / 2 = 625 / 2 = 312.25 m A = sqrootÿ[ s ( s - a ) ( s - b ) ( s - c ) ] A = sqrootÿ[ 312.25 ( ...

*December 11, 2015*

**Algebra**

x = - 2 / 3 - 6 x + 7 y = 11 - 6 * ( - 2 / 3 ) + 7 y = 11 12 / 3 + 7 y = 11 4 + 7 y = 11 Subtract 4 to both sides 4 + 7 y - 4 = 11 - 4 7 y = 7 Divide both sides by 7 y = 1 Coordinate x = - 2 / 3 , y = 1 OR ( - 2 / 3 , 1 )

*December 9, 2015*

**Math**

16 / 36 = 4 * 4 / ( 4 * 9 ) = 4 / 9

*December 9, 2015*

**Mathxxx!!!**

1. 4 x + 3 = 2 ( 2 x + 9 ) 5. a. 7 x - 12 = 8 x + 29 - x 7 x - 12 = 7 x + 29 Incorrect No solutions b. - 4 + 5 x = 2 ( 3 x - 4 ) - 4 + 5 x = 2 * 3 x - 2 * 4 - 4 + 5 x = 6 x - 8 Subtract 5 x to both sides - 4 + 5 x - 5 x = 6 x - 8 - 5 x - 4 = x - 8 Add 8 to both sides - 4 + 8...

*December 8, 2015*

**math**

f ( 17 ) = 0.01 ( 2 ) ^ x = 0.01 ( 2 ) ^ 17 = 0.01 * 131072 = 1310.72 f ( 10 ) = 0.01 ( 2 ) ^ x = 0.01 ( 2 ) ^ 10 = 0.01 * 1024 = 10.24 The average rate of change : [ f ( 17 ) - f ( 10 ) ] / ( 17 - 10 ) = [ f ( 17 ) - f ( 10 ) ] / 7 = ( 1310.72 - 10.24 ) / 7 = 1300.48 / 7 = ...

*December 8, 2015*

**Math**

Straight line equations: y = mx + b m = slope b = y-intercept ( Point on the graph where x is zero ) Difference between y coordinates is constant = 15 29 - 14 = 15 44 - 29 = 15 59 - 44 = 15 Slope = 15 y-intercept = y coordinate when x = 0 y-intercept = 14 So : m = 15 b = 14 y...

*December 8, 2015*

**Math**

You can write : y = ( x - 1896 ) / 150 like : P / Q = ( x - 1896 ) / 150

*December 8, 2015*

**Math**

If the ratio is a linear function then : Two point equation of straight line : y = y1 + [ ( y2 - y1 ) / ( x2 - x1 ) ] * ( x - x1 ) In this case : x1 = 1996 y1 = 2 / 3 x2 = 2001 y2 = 7 / 10 y = y1 + [ ( y2 - y1 ) / ( x2 - x1 ) ] * ( x - x1 ) y = 2 / 3 + [ ( 7 / 10 - 2 / 3...

*December 8, 2015*

**math**

60 percent = 60 % = 60 / 100 = 0.6 0.6 * 30 = 18 18 questions

*December 8, 2015*

**Algebra**

My misprint. 1.2912 * 100 % = 129.12 %

*December 3, 2015*

**Algebra**

412.99 / 319.85 = 1.2912 1.2912 * 100 = 129.12 % 129.12 % - 100 % = 29.12 % 29 % To the nearest whole percent.

*December 3, 2015*

**maths**

Reinny In w o l f r a m a l p h a . com type: solve ( x + y ) / 2 = sqroot ( x * y ) + 2 , 2 / ( 1 / x + 1 / y ) = x / 5 The solutions are : 9 and 1

*December 1, 2015*

**Math**

Not at all. highest concentration = infinity as x tends towards 0.

*November 30, 2015*

**Math**

The question does not make sense. a t / t ^ 2 = 3 t / t ^ 2 = 3 t / ( t * t ) = 3 / t a t / t ^ 2 + b = 3 t / t ^ 2 + 1 = 3 / t + 1 Tends to infinity as x tends towards 0.

*November 30, 2015*

**6 grade Math**

241.5 / 12.5 = 193.2 / x Multiply both sides by 12.5 241.5 * 12.5 / 12.5 = 193.2 * 12.5 / x 241.5 = 2415 / x Multiply both sides by x 241.5 * x = 2415 * x / x 241. 5 x = 2415 Divide both sides by 241.5 2415.5 x / 241.5 = 2415 / 241.5 x = 10 cm ^ 3 OR 12.5 / 241.5 = 0....

*November 30, 2015*

**math**

A = Area r = radius d = diameter A = r ^ 2 pi OR r = d / 2 A = r ^ 2 pi = ( d / 2 ) ^ 2 * pi = ( d ^ 2 / 4 ) * pi = d ^ 2 pi / 4

*November 30, 2015*

**Solving Trig Equations**

Trigonometric identity: sin ( - x ) = - sin x On interval [ 0 , pi ] [ 0 , 180 ° ] you have 2 angles with sin x = sqroot ( 3 ) / 2 x = pi / 3 = 60 ° and x = 2 pi / 3 = 120 ° So if sin ( - x ) = sin x on interval [ - pi , 0 ] [ - 180 ° , 0 ] you have 2 angles ...

*November 27, 2015*

**Algebra 2**

sqrt ( - 28 ) = sqrt ( - 4 * 7 ) = sqrt ( - 1 * 4 * 7 ) = sqrt ( - 1 ) * sqrt ( 4 ) * sqrt ( 7 ) = i * 2 * sqrt ( 7 ) = 2 i sqrt ( 7 )

*November 27, 2015*

**algebra**

Yes. 8 x ^ 2 + 3 ( x ^ 2 + y ) = 8 x ^ 2 + 3 * x ^ 2 + 3 * y = 8 x ^ 2 + 3 x ^ 2 + 3 y = 11 x ^ 2 + 3 y 7 x ^ 2 + 7 y + 4 x ^ 2 - 4 y = 7 x ^ 2 + 4 x ^ 2 + 7 y - 4 y = 11 x ^ 2 + 3 y

*November 27, 2015*

**Math Algebra**

2 % = 2 / 100 = 0.02 2 % of 5 = 0.02 * 5 = 0.1 3 % = 3 / 100 = 0.03 3 % of 12 = 0.03 * 12 = 0.36 The new fraction: ( 5 - 0.1 ) / ( 12 + 0.36 ) = 4.9 / 12.36 Multiply numerator and enominator by 100 490 / 1236 = 2 * 5 * 7 * 7 / ( 2 * 2 * 3 * 103 ) = 5 * 7 * 7 / ( 2 * 3 * 103...

*November 27, 2015*

**math**

W = Wide H = height D = Diagonal W / H = 16 / 9 20 / H = 16 / 9 Multiply both sides by 9 20 * 9 / H = 16 * 9 / 9 180 / H = 16 Multiply both sides by H 180 * H / H = 16 * H 180 = 16 H Divide both sides by 16 180 / 16 = 16 H / 16 11.25 = H H = 11.25 in Pythagorean theorem : D = ...

*November 27, 2015*

**Math**

25 / ( pi + 6 ) = 25 / ( 3.1415926535 + 6 ) = 25 / 9.1415926535 = 2.734753226 approx. = 2.73 What is problem?

*November 26, 2015*

**Math**

A = first angle B = second angle In the right triangel summ of angles = 180 ° If the sum of two acute angles in a right triangle is 90 degrees this mean : A + B = 180 ° - 90 ° = 90 ° A + B = 90 ° Twice the first is 40 degrees more than thrice the second. ...

*November 26, 2015*

**Math**

The length of the rectangle 5cm more than twice the width. This mean : L = 5 + 2 W P = 2 W + 2 L = 2 ( W + L ) 70 = 2 ( W + L ) 70 = 2 ( W + 5 + 2W ) 70 = 2 ( 3 W + 5 ) Divide both sides by 2 70 / 2 = 2 ( 3 W + 5 ) / 2 35 = 3 W + 5 Subtract 5 to both sides 35 - 5 = 3 W + 5 - 5...

*November 26, 2015*

**Mathematics**

If " n " is an integer, then n, n + 2, n + 4 and n + 6 will be even consecutive integers. Four times the greatest is 36 more than more than the sum of the other three. This mean : 4 ( n + 6 ) = 36 + ( n + n + 2 + n + 4 ) 4 ( n + 6 ) = 36 + ( n + n + 2 + n + 4 ) 4 * n...

*November 26, 2015*

**Math**

If you think on circumference of a circle. C = d * pi pi = 22 / 7 C = d * pi C = 2.1 * ( 22 / 7 ) = 2.1 * 22 / 7 = 46.2 / 7 = 6.6

*November 26, 2015*

**MATH**

a. - 3 y / - 2 = 3 y / 2 = ( 3 / 2 ) y So : x = 9 - 3 y / - 2 = 9 + ( 3 / 2 ) y x = 9 + ( 3 / 2 ) y Subtract ( 3 / 2 ) y to both sides x - ( 3 / 2 ) y = 9 + ( 3 / 2 ) y - ( 3 / 2 ) y x - ( 3 / 2 ) y = 9 When you compare with : a x + b y = c you can see : a = 1 b = - ( 3 / 2 ) ...

*November 26, 2015*

**Maths**

Whole class have 10 / 10 students. 9 / 10 student was absen. 3 students were present. 3 students = 10 / 10 - 9 / 10 = 1 / 10 1 / 10 = 3 students Solve this.

*November 26, 2015*

**Pre-Calculus HELP!!**

The twelfth day of the year mean t = 12 Now you must put t = 12 into your equation. ( 2 pi / 365 ) t - 1.25 ) = ( 2 * 3.14159216535 / 365 ) * 12 - 1.25 = ( 6.283185307 / 365 ) * 12 - 1.25 = 0.01721420632 * 12 - 1.25 = 0.20657047584 - 1.25 = - 1.04342952416 Now take calculator...

*November 26, 2015*

**math**

1 1/3 = 1 + 1 / 3 = 3 / 3 + 1 / 3 = 4 / 3 ( 1 1/3 ) / ( 2 / 5 ) = ( 4 / 3 ) / ( 2 / 5 ) = ( 4 * 5 ) / ( 3 * 2 ) = 20 / 6 = ( 2 * 10 ) / ( 2 * 3 ) = 10 / 3 = ( 9 + 1 ) / 3 = 9 / 3 + 1 / 3 = 3 + 1 / 3 = 3 1/3 cantrs

*November 24, 2015*

**Math**

Question 8 x / 70 = 50 / 100 Multiply both sides by 100 100 x / 70 = 50 Multply both sides by 70 100 x = 50 * 70 100 x = 3500 Divide both sides by 100 x = 3500 / 100 = 35 x / 50 = 70 / 100 Multiply both sides by 100 100 x / 50 = 70 Multply both sides by 50 100 x = 70 * 50 100 ...

*November 23, 2015*

**math**

18 / 2 = 9 54 / 6 = 9 Answer c

*November 23, 2015*

**math**

The average marks of 14 students was 71. This mean : ( x1 + x2 + x3 + ... x14 ) / 14 = 71 ( x1 + x2 + x3 + ... x14 ) / 14 = 71 Multiply both sides by 14 x1 + x2 + x3 + ... x14 = 71 * 14 x1 + x2 + x3 + ... x14 = 994 = Total marks On this marks you must add 56 - 42 = 14 and ...

*November 22, 2015*

**Geometry**

Area of a triangle: A = b * h / 2 A triangle base is 3 inches more than it's height. This mean : b = h + 3 A = b * h / 2 = ( h + 3 ) * h / 2 = 35 in ^ 2 ( h * h + 3 * h ) / 2 = 35 ( h ^ 2 + 3 h ) / 2 = 35 Multiply both sides by 2 h ^ 2 + 3 h = 70 Subtract 70 to both sides ...

*November 21, 2015*

**Algebra (help please!)**

Even integers differ by two. If 3s is even, the even just below 3s is (3s -2) and the even just above 3s would be (3s+2) so you must find product : ( 3s - 2 ) ( 3 s ) ( 3 s + 2 ) = ( 3 s * 3 s - 2 * 3 s ) ( 3 s + 2 ) = ( 9 s ^ 2 - 6 s ) ( 3 s + 2 ) = 9 s ^ 2 * 3 s + 9 s ^ 2 * ...

*November 11, 2015*

**Mathematics**

Paste your question in google. You will se couple answers.

*November 10, 2015*

**Math**

3 x + 4 y = 12 Subtract 3 x to both sides 3 x + 4 y - 3 x = 12 - 3 x 4 y = 12 - 3 x 4 y = - 3 x + 12 Divide both sides by 4 4 y / 4 = - 3 x / 4 + 12 / 4 y = - ( 3 / 4 ) x + 3

*November 10, 2015*

**Math**

m = ( y1 - y2 ) / ( x1 - x2 ) In this case : x1 = 3 , y1 = 4 x2 = 6 , y2 = - 2 m = ( y1 - y2 ) / ( x1 - x2 ) = [ 4 - ( - 2 ) ] / ( 3 - 6 ) = ( 4 + 2 ) / - 3 = 6 / - 3 = - 2

*November 10, 2015*

**Math**

Linear eguation in Two-point form : y - y1 = [ ( y2 - y1 ) / ( x2 - x1 ) ] * ( x - x1 ) In this case : x1 = 3 , y1 = 4 x2 = 6 , y2 = - 2 y - y1 = [ ( y2 - y1 ) / ( x2 - x1 ) ] * ( x - x1 ) y - 4 = [ ( -2 - 4 ) / ( 6 - 3 ) ] * ( x - 3 ) y - 4 = [ - 6 / 3 ] * ( x - 3 ) y - 4...

*November 10, 2015*

**Math**

He read 60 - 4 = 56 pages 1 week = 7 days 56 pages divide by 7 days 56 / 7 = 8 pages per day

*November 10, 2015*

**math**

1 mile = 5,280 ft Multiply by 5,280

*November 7, 2015*

**Math**

Approximately correct answer. cos B = ( a ^ 2 + c ^ 2 - b ^ 2 ) / ( 2 a c ) = ( 9 ^ 2 + 11 ^ 2 - 3 ^ 2 ) / ( 2 * 9 * 11 ) = ( 81 + 121 - 9 ) / 198 = 193 / 198 = 0.97474747 B = cos ^ - 1 ( 0.97474747 ) B = 12,90352 ° B = 12 ° 54 ' 12.672 " B = 12 ° 54 '...

*November 6, 2015*

**Math**

Copy your question in google. When you see list of results click on : Jupiter V Superstars III - Elliott Tech, LLC You will see answer with detail explanation.

*November 3, 2015*

**math help connections academy HHEELLPP**

19 = h / 3 - 8 Add 8 to both sides 19 + 8 = h / 3 - 8 + 8 27 = h / 3 Multiply both sides by 3 27 * 3 = h 81 = h h = 81

*November 3, 2015*

**Math**

Correct 75 kg 568 g = 75.568 kg 8 kg 959 g = 8.959 kg 75.568 - 8.959 = 66.609 66.609 kg = 66 kg 609 g

*November 3, 2015*

**mathematics**

a4 = 37 a6 = a4 + 12 a6 = 37 + 12 = 49 In an arithmetic progression nth term of the sequence (an) is given by: an = a1 + ( n - 1 ) d so: a4 = a1 + ( 4 - 1 ) d = 37 a1 + 3 d = 37 a6 = a1 + ( 6 - 1 ) d = 49 a1 + 5 d = 49 Now you must solve system of two equations with two ...

*November 3, 2015*

**Algebra**

In this case : x1 = - 6 , y1 = 4 x2 = 3 , y2 = - 5 Equation of a straight line from 2 points : y = y1 + [ ( y2 - y1 ) / ( x2 - x1 ) ] ( x - x1 ) y = 4 + [ ( - 5 - 4 ) / ( 3 - ( - 6 ) ) ] ( x - ( - 6 ) ) y = 4 + [ ( - 9 ) / ( 3 + 6 ] ( x + 6) y = 4 + [ ( - 9 ) / 9 ] ( x + 6) y...

*October 31, 2015*

**Maths**

1 m = 1000 mm 465 mm = 465 / 1000 = 0.465 m 320 mm = 320 / 1000 = 0.320 m 0.465 * 0. 320 = 0.1488 metre squared 0.1488 * 25 = 3.72 $ 3.72

*October 31, 2015*

**8th grade algebra**

Correct result. You also find result like that: 3 x 10 ^ - 2 = 3 / 10 ^ 2 = 0.03 6.2 x 10 ^ 1 = 6.2 x 10 = 62 3 x 10 ^ - 2 - 6.2 x 10 ^ 1 = 0.03 - 62 = - 61.97 = - 6.197 * 10 ^ 1

*October 29, 2015*

**Math**

- x ^ 4 + 4 x ^ 4 = 3 x ^ 4 (dy÷dx) f(x)= 3 limit as h -> 0 [ ( x + h ) ^ 4 - x ^ 4 ] / h = 3 limit as h -> 0 [ ( x ^ 4 + 4 x ^ 3 h + 6 x ^ 2 h ^ 2 + 4 x h ^ 3 + h ^ 4 ) - x ^ 4 ] / h = 3 limit as h -> 0 ( 4 x ^ 3 h + 6 x ^ 2 h ^ 2 + 4 x h ^ 3 + h ^ 4 ) / h = 3...

*October 28, 2015*

**precalculus**

P.S. If you do not know how to write this value go to: w o l f r a m a l p h a . c o m When page be open in rectangle type : sin ( 3 pi / 8 ) then in rectangle click option =

*October 28, 2015*

**precalculus**

Remark : _________________________________ pi / 8 = 22.5° = 22° 30' 3 pi / 8 = 4 pi / 8 - pi / 8 = pi / 2 - pi / 8 3 pi / 8 = 90° - 22° 30' = 67° 30' pi / 4 = 45° sin ( pi / 4 ) = sqroot ( 2 ) / 2 cos ( pi / 4 ) = sqroot ( 2 ) / 2 pi / 2 = ...

*October 28, 2015*

**Algebra**

Nuber of 18 yrs old students = x1 Nuber of 19 yrs old students = x2 Nuber of 20 yrs old students = x3 The number of 18 year old was six more than the combined number of 19 and 20 year olds. This mean : x1 = x2 + x3 + 6 x1 = x2 + x3 + 6 Subtract 6 to both sides x1 - 6 = x2 + x3...

*October 27, 2015*

**Math**

All real numbers except x = 0 , because for x = 0 , 1 / x -> + OR - infinity. Domain looks like this in interval notation : ( - infinity , 0 ) U ( 0 , infinity )

*October 24, 2015*

**Math**

65 = 5 * 13 390 = 5 * 13 * 6 65 : 390 = 5 * 13 : ( 5 * 13 * 6 ) = 1 : 6

*October 24, 2015*

**math**

Put t = 12 and s = 9 into equations. 1. 3 ( 3 t + s ) = 3 * ( 3 * 12 + 9 ) = 3 * ( 36 + 9 ) = 3 * 45 = 135 2. 2 s - t = 2 * 9 - 12 = 18 - 12 = 6

*October 23, 2015*

**Math**

3 x + 3 ( x - 1 ) <= 18 3 x + 3 x - 3 <= 18 6 x - 3 <= 18 Add 3 to both sides 6 x - 3 + 3 <= 18 + 3 6 x <= 21 Divide both sides by 6 x <= 21 / 6 x <= 3 * 7 / ( 3 * 2 ) x <= 7 / 2

*October 20, 2015*

**MATh**

2.8 x = - 9.24 Divide both sides by 2.8 2.8 x / 2.8 = - 9.24 / 2.8 x = - 3.3

*October 20, 2015*

**MATh**

- 5 g - 6 g = - 2 - 5 * ( - 2 ) - 6 = 10 - 6 = 4 the sum of 3 coins and c coins = 3 + c = c + 3 x - 2 = 16 Add 2 to both sides x - 2 + 2 = 16 + 2 x = 18 z / - 12 = - 5 Multiply both sides by - 12 z * ( - 12 ) / - 12 = - 5 * - 12 z = 60 x - 8.1 = 5.3 Add 8.1 to both sides x - 8...

*October 20, 2015*

**math**

1 - 1 / 5 = 5 / 5 - 1 / 5 = 4 / 5 6 * 4 / 5 = 24 / 5 = $ 4.8 OR 1 / 5 of 6 = 6 / 5 = $ 1.2 $ 6 -$ 1.2 = $ 4.8

*October 19, 2015*

**maths**

first number = 7 n second number = 7 n + 7 third number = 7 n + 14 7 n + 7 n + 7 + 7 n + 14 = 777 21 n + 21 = 777 Subtact 21 to both sides 21 n + 21 - 21 = 777 - 21 21 n = 756 Divide both sides by 21 n = 756 / 21 = 36 first number = 7 n = 7 * 36 = 252 second number = 7 n + 7...

*October 15, 2015*

**math**

3,600 miles / 40 miles per gallon = 90 gallons 90 * 2.4 $ = 216 $

*October 15, 2015*

**Math**

1 yd = 3 ft 1 yd ^ 2 = ( 3 ft ) ^ 2 = 9 ft ^ 2 1 yd ^ 2 / 2 min = 9 / 2 = 4.5 ft ^ 2 / min 3 ft * 30 ft = 90 ft ^ 2 90 ft ^ 2 / ( 4.5 ft ^ 2 / min ) = 20 min

*October 14, 2015*

**Math**

1 h = 60 min 40 min = 40 / 60 = 2 * 20 / ( 3 * 20 ) = 2 / 3 h 8 h 40 min = 8 h + 2 / 3 h = 8 * 3 / 3 + 2 / 3 = 24 / 3 - 2 / 3 = 26 / 3 h 3 h = 3 * 3 / 3 = 9 / 3 h Car travel 8 h 40 min. For this time the bus travel = 8 h 40 min + 3 h = 11 h 40 min = 8 h 40 min + 3 h = 26 / 3 h...

*October 14, 2015*

**applications in algebra**

A bedroom is 7 feet longer than its width. This mean L = 7 + W A = L * W = 228 ( 7 + W ) * W = 228 7 W + W ^ 2 = 228 W ^ 2 + 7 W = 228 Subtract 228 to both sides W ^ 2 + 7 W - 228 = 228 - 228 W ^ 2 + 7 W - 228 = 0 The solutions are : W = 12 and W = - 19 Width can't be ...

*October 11, 2015*

**Math,english,agric,b/sci,PHE,computer,etc**

The sum of two consecutive integers can't be an even number, because the one number is even and the other odd. in this case: a = first number b = second number b = a + 1 a + b = 122 a + a + 1 = 122 2 a + 1 = 122 Subtract 1 to both sides 2 a + 1 - 1 = 122 - 1 2 a = 121 ...

*October 11, 2015*

**Math**

No. 5 ^ 2 + 10 ^ 2 - 2 * 5 * 10 cos 50° = 25 + 100 - 100 * cos 50° = 25 + 100 ( 1 - cos 50 ° ) = 25 + 100 * ( 1 - 0.64278761 ) = 25 + 100 * 0.35721239 = 25 + 35.721239 = 60.721239 5 ^ 2 + 10 ^ 2 - 2 * 5 * 10 cos 130° = 25 + 100 - 100 * cos 130° = 25 + 100...

*October 11, 2015*

**Math**

166 2/3 % = 166 / 100 + ( 2 / 3 ) / 100= [ 166 + ( 2 / 3 ) ] / 100 = ( 166 * 3 / 3 + 2 / 3 ) / 100 = ( 498 / 3 + 2 / 3 ) / 100 = ( 500 / 3 ) / 100 = 5 / 3 60 / ( 5 / 3 ) = 60 * 3 / 5 = 180 / 5 = 36 Proof : 166 2/3% = 166 / 100 + ( 2 / 3 ) / 100 = 1....

*October 9, 2015*

**Math- HELP**

1. 7 / 8 = 0.875 2. 1 1/2 = 1 + 1 / 2 = 1.5 3. 4 3/8 = 4 + 3 / 8 = 4.375 4. 0.4 = 4 / 10 = 2 * 2 / ( 2 * 5 ) = 2 / 5 5. 7.1 = 7 + 0.1 = 7 + 1 / 10 = 7 1/10

*October 9, 2015*

**Math**

4 / 5 = 4 * 3 / ( 5 * 3 ) = 12 / 15 - 7 / 15 + ( - 4 / 5 ) = - 7 / 15 - 4 / 5 = - 7 / 15 - 12 / 15 = - 19 / 15

*October 8, 2015*

**Math**

Prime numbers 1 - 10 are : 1 , 2 , 3 , 5 and 7 tottal 4 numbers the odds of you getting a prime number = 4 / 10 = 0.4 = 40 %

*October 8, 2015*