Math at eNotes
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The latest questions and answers, from members following Math at eNotes.Tue, 23 Dec 2014 00:29:31 PSTen-usMath is extremely crucial in ourlife because it is part of our every day...
http://www.enotes.com/homework-help/why-math-such-an-important-part-our-lives-389103
Math is extremely crucial in ourlife because it is part of our every day life. Even though you might not notice it but we use it everyday. Kowing it makes you a valuable person.http://www.enotes.com/homework-help/why-math-such-an-important-part-our-lives-389103Tue, 23 Dec 2014 00:29:31 PSTQUESTION:- (y/2) + 5=12 SOLUTION:- `y/2+5=12` Take 2 as LCD and multiply...
http://www.enotes.com/homework-help/y-2-5-12-461326
QUESTION:- (y/2) + 5=12 SOLUTION:- `y/2+5=12` Take 2 as LCD and multiply it with 5 so that denominators are same, making addition easy; `y/2*1/1+5/1*2/2=12` `y/2+10/2=12` `(y+10)/2=12` Now we will cross multiply i.e., 2 of LHS denominator will be cross multiplied to RHS 12 of numerator, hence; `y+10=12*2` `y+10=24` Subtract 10 from both sides as to cancel the 10 on LHS so that y value can be retained; `y+10-10=24-10` `y=14` Hence the answer...http://www.enotes.com/homework-help/y-2-5-12-461326Mon, 22 Dec 2014 18:56:29 PSTQUESTION:- 5/-3 x 4 x -2/-9 ANSWER:- `5/(-3)*4*(-2)/(-9)`...
http://www.enotes.com/homework-help/5-3-x-4-x-2-9-461317
QUESTION:- 5/-3 x 4 x -2/-9 ANSWER:- `5/(-3)*4*(-2)/(-9)` `=5/(-3)*4/1*(-2)/(-9)` When there is a minus sign in the denominator of a fraction then the whole fractions sign turns into minus. Hence; `=(-5/3)*4/1*(-2)/(-9)` When a fraction contains minus signs in both numerator and denominator, both the signs will be canceled leaving a plus sign. Hence; `=(-5/3)*4/1*2/9` Now Multiply the fractions with positive signs that can be done easily....http://www.enotes.com/homework-help/5-3-x-4-x-2-9-461317Mon, 22 Dec 2014 18:46:59 PSTQUESTION:- Express 97/9 as a mixed or whole number? SOLUTION:- In this...
http://www.enotes.com/homework-help/express-97-9-mixed-whole-number-460758
QUESTION:- Express 97/9 as a mixed or whole number? SOLUTION:- In this problem, it is asked to express the given fraction in the form of whole number or mixed number. The given fraction is; `97/9` First you have to see if 97 comes in the table of 9, if no then see that which is the number closest to 97 that comes in the table of 9 and can be perfectly divided by 9. Like {9 x 10 = 90} This is the closest number to 97 that can be divided by 9....http://www.enotes.com/homework-help/express-97-9-mixed-whole-number-460758Mon, 22 Dec 2014 18:37:07 PSTQUESTION:- 3/10-(-5/8)=? SOLUTION:- `3/10-(-5/8)` First open the...
http://www.enotes.com/homework-help/3-10-5-8-460360
QUESTION:- 3/10-(-5/8)=? SOLUTION:- `3/10-(-5/8)` First open the bracket, for that we know the rule when 2 minus signs are multiplied with each other, we get a plus sign. Therefore, `=3/10+5/8` Find the LCD of 8 and 10. In this problem the lowest common denominator is 40, therefore, `=3/10*4/4+5/8*5/5` `=12/40+25/40` `=(12+25)/40` Add; `=37/40` Hence the answer of this problem is 37/40. Hence it is Solved! http://www.enotes.com/homework-help/3-10-5-8-460360Mon, 22 Dec 2014 18:28:15 PSTQUESTION:- If 16 cakes can be baked in 1 hour. How many can be baked in...
http://www.enotes.com/homework-help/16-cakes-can-baked-1-hour-how-many-can-baked-5-3-460326
QUESTION:- If 16 cakes can be baked in 1 hour. How many can be baked in 5 3/4 hours? SOLUTION:- Total Cakes baked in one hour = 16 Cakes baked in `5(3/4)` hours = ? To find the number of cakes that can be baked in 5 3/4 hours; Cakes baked in `5(3/4)` hours = total cakes baked in 1 hour x `5(3/4)` = 16 x `23/4` = 4...http://www.enotes.com/homework-help/16-cakes-can-baked-1-hour-how-many-can-baked-5-3-460326Mon, 22 Dec 2014 05:27:07 PSTQUESTION:- Solve this equation 2=7+b/4 SOLUTION:- The equation to be...
http://www.enotes.com/homework-help/solve-this-equation-2-7-b-4-460402
QUESTION:- Solve this equation 2=7+b/4 SOLUTION:- The equation to be solved; Transfer 7 to LHS and change its sign; `2=7+b/4` `2 - 7 = b/4` `-5=b/4` `Multiply(4*(-5))` `-20=b` `b=-20` Hence the answer is b=-20 ` `http://www.enotes.com/homework-help/solve-this-equation-2-7-b-4-460402Mon, 22 Dec 2014 05:18:00 PSTQUESTION:- Solve for x: 24x + 11 = 5x + 8x SOLUTION:- 24x + 11 = 5x +...
http://www.enotes.com/homework-help/24x-11-5x-8x-460515
QUESTION:- Solve for x: 24x + 11 = 5x + 8x SOLUTION:- 24x + 11 = 5x + 8x Solving for the value of x; Bring 24x to RHS with all the 'x' values by changing its sign; 11 = 5x + 8x - 24x 11 = 13x - 24x 11 = -11x Now divide by -11 both sides; 11/(-11) = -11x/(-11) -1 = x Therefore; x = -1 is the answer. The answer can be rechecked by inserting the value of x in the problem; Solve for x: 24x + 11 = 5x + 8x Hence; 24 (-1) + 11 = 5 (-1) + 8(-1)...http://www.enotes.com/homework-help/24x-11-5x-8x-460515Mon, 22 Dec 2014 05:10:35 PSTQUESTION:- -8v-10=-3(2v-2) SOLUTION:- We have solve for the value of v,...
http://www.enotes.com/homework-help/8v-10-3-2v-2-460537
QUESTION:- -8v-10=-3(2v-2) SOLUTION:- We have solve for the value of v, hence; -8v - 10 = -3(2v-2) Open the bracket of RHS first by multiplying 3 to both values; -8v - 10 = -6v + 6 Bring -6v on LHS and -10 On RHS, changing signs of both of them; -8v + 6v = 6 + 10 -2v = 16 Divide both sides by -2; -2v/(-2) = 16/(-2) v = -8 Hence the answer is v= -8http://www.enotes.com/homework-help/8v-10-3-2v-2-460537Mon, 22 Dec 2014 05:03:35 PSTQUESTION:- 9-y=16 SOLUTION:- 9 - y = 16 We have to simplify till we get...
http://www.enotes.com/homework-help/9-y-16-460549
QUESTION:- 9-y=16 SOLUTION:- 9 - y = 16 We have to simplify till we get the value of y or till it is further impossible to simplify; Subtract 16 from both sides; 9 - y -16 = 16 - 16 Since 16-16-0 Hence; 9 - y - 16 = 0 - y - 7 = 0 Transfer -7 to RHS, - y = 7 Transfer the subtraction sign; y = -7 Answerhttp://www.enotes.com/homework-help/9-y-16-460549Mon, 22 Dec 2014 04:43:41 PSTQUESTION:- 2/7x-1/2x=3/4x+1 `2/(7x)-1/(2x)=3/(4x)+1` SOLUTION:- Bring...
http://www.enotes.com/homework-help/2-7x-1-2x-3-4x-1-460574
QUESTION:- 2/7x-1/2x=3/4x+1 `2/(7x)-1/(2x)=3/(4x)+1` SOLUTION:- Bring all of the digits except 1 on LHS, since 1 does not contain any x value; `2/(7x)-1/(2x)-3/(4x)=1` Find the LCD (Lowest Common Denominator). Here the LCD of 7,2 and 4 is 28, hence; `2/(7x)*(4/4)-1/(2x)*(14/14)-3/(4x)*(7/7)=1` `8/(28x)-14/(28x)-21/(28x)=1` `(8-14-21)/(28x)=1` `-27/(28x)=1` `-27=28x` `x=-27/28` Hence the answer is x = -27/28http://www.enotes.com/homework-help/2-7x-1-2x-3-4x-1-460574Mon, 22 Dec 2014 04:39:31 PSTQUESTION:- 12+5k=15-4k SOLUTION:- 12 + 5k = 15 - 4k Bring the k values...
http://www.enotes.com/homework-help/12-5k-15-4k-460576
QUESTION:- 12+5k=15-4k SOLUTION:- 12 + 5k = 15 - 4k Bring the k values on LHS and the rest values on RHS; Now as we know when we want to transfer a digit from one side to other side, the digit being transferred will change its sign, like for example if we want to transfer 3 from LHS to RHS, then the sign of 3 will turn to negative from positive; 5k + 4k = 15 -12 9k = 3 k = 3/9 k = 1/3 Hence Solved!http://www.enotes.com/homework-help/12-5k-15-4k-460576Mon, 22 Dec 2014 04:21:00 PSTQUESTION:- 16 is 35% of what? SOLUTION:- 16 is 35% of what? Let x be...
http://www.enotes.com/homework-help/16-35-what-460584
QUESTION:- 16 is 35% of what? SOLUTION:- 16 is 35% of what? Let x be the unknown number; 16 is 35% of x 16 = 35% * x 16 = 35/100 (x) Multiply with 100 on both sides; 16 . 100 = 35x 1600 = 35x Divide by 35 on both sides; 1600/35 = 35x/35 45.714 = x Hence the answer is 45.714 16 is 35% of 45.714 The answer can be rechecked by putting the value of x in the given problem; 16 = 35% of 45.714 16 = 35/100 * 45.714 16 = 0.35 * 45.714 16 = 16 LHS =...http://www.enotes.com/homework-help/16-35-what-460584Mon, 22 Dec 2014 04:15:25 PSTQUESTION:- solve 3x2+1=-26 SOLUTION:- `3x^2+1=-26` To bring 26 on LHS...
http://www.enotes.com/homework-help/solve-3x2-1-26-460601
QUESTION:- solve 3x2+1=-26 SOLUTION:- `3x^2+1=-26` To bring 26 on LHS we have to add 26 to both sides; `3x^2+1+26=-26+26` `3x^2+1+26=0` `3x^2+27=0` Take 3 common:- `3(x^2+9)=0` Divide by 3 both sides:- `(3(x^2+9))/3=0/3` `x^2+9=0` Subtract 9 on both sides; `x^2+9-9=0-9` `x^2=-9` Taking square root on both sides; `sqrt(x^2)=sqrt(-9)` The square root and the exponent will be canceled with each other, then we will get; `x=sqrt(-9)`...http://www.enotes.com/homework-help/solve-3x2-1-26-460601Mon, 22 Dec 2014 04:01:27 PSTQUESTION:- g-6=2 SOLUTION:- In this problem, we have to simplify in...
http://www.enotes.com/homework-help/g-6-2-460304
QUESTION:- g-6=2 SOLUTION:- In this problem, we have to simplify in order to get the value of g or till the simplification is possible. g - 6 = 2 Now add 6 to both sides in order to cancel -6 on LHS (Left Hand Side) g - 6 = 2 g - 6 + 6 =2 + 6 g = 8 Hence Simplified!http://www.enotes.com/homework-help/g-6-2-460304Mon, 22 Dec 2014 03:46:33 PST