Math at eNotes
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The latest questions and answers, from members following Math at eNotes.Mon, 28 Jul 2014 01:00:15 PSTen-usWhat does the phrase "Twice a number x" mean? Why do we replace numbers...
http://www.enotes.com/homework-help/twice-number-x-470096
What does the phrase "Twice a number x" mean? Why do we replace numbers with letters/symbols? a number = x and the twive usually means you multiply that number (x) by 2 meaning twice a number x is the same as 2x The reason you replace numbers with letters/symbols is because it tells you that number is unknown (think of an x-file) and therefore by putting that symbol we know we have to solve to get that number.http://www.enotes.com/homework-help/twice-number-x-470096Mon, 28 Jul 2014 01:00:15 PST6^2+5x-6=0 a=6 b=5 c=-6 (-b+square root((b^2)-4(a*c)))/(2*a)...
http://www.enotes.com/homework-help/how-do-solve-this-equation-by-useing-guess-check-423414
6^2+5x-6=0 a=6 b=5 c=-6 (-b+square root((b^2)-4(a*c)))/(2*a) (-5+sqroot((5^2)-4(6*-6)))/(2*6)= 0.67 or 2/3 (-5-sqroot((5^2-4(6*-6)))/(2*6)=-1.5 x=2/3 or x=-1.5http://www.enotes.com/homework-help/how-do-solve-this-equation-by-useing-guess-check-423414Sun, 27 Jul 2014 22:12:27 PST3(8x-2)+4x-3(2x+1)-5 24x-6+4x-6x-3-5 24x+4x-6x-6-3-5 22x-14
http://www.enotes.com/homework-help/3-8x-2-4x-3-2x-1-5-423612
3(8x-2)+4x-3(2x+1)-5 24x-6+4x-6x-3-5 24x+4x-6x-6-3-5 22x-14http://www.enotes.com/homework-help/3-8x-2-4x-3-2x-1-5-423612Sun, 27 Jul 2014 21:45:10 PST5-3(x-1)=? x=7 5-3(7-1) 5-3(6) 5-18 -13
http://www.enotes.com/homework-help/5-3-x-1-when-x-7-423051
5-3(x-1)=? x=7 5-3(7-1) 5-3(6) 5-18 -13http://www.enotes.com/homework-help/5-3-x-1-when-x-7-423051Sun, 27 Jul 2014 21:37:16 PSTa^2+b^2=c^2 b=radius 16^2+b^2=20^2 256+b^2=400 256+b^2-256=400-256...
http://www.enotes.com/homework-help/how-do-you-find-volume-cone-terms-pi-when-given-423209
a^2+b^2=c^2 b=radius 16^2+b^2=20^2 256+b^2=400 256+b^2-256=400-256 b^2=144 b=12 v=1/3*pi*r^2*h v=1/3*pi*12^2*16 v=768pihttp://www.enotes.com/homework-help/how-do-you-find-volume-cone-terms-pi-when-given-423209Sun, 27 Jul 2014 21:24:11 PST6(1-2x)-3(x+10)=0 6(1-2x)-3(x+10)=0 6-12x-3x-30=0 -24-15x=0...
http://www.enotes.com/homework-help/6-1-2x-3-x-10-0-how-do-you-solve-423181
6(1-2x)-3(x+10)=0 6(1-2x)-3(x+10)=0 6-12x-3x-30=0 -24-15x=0 -24-15x+24=0+24 -15x=24 -15x/-15=24/-15 x=-1.6http://www.enotes.com/homework-help/6-1-2x-3-x-10-0-how-do-you-solve-423181Sun, 27 Jul 2014 18:50:02 PSTIf you are given a problem with lengths of sides of a triangle, you can...
http://www.enotes.com/homework-help/find-area-triangle-with-component-measurements-470144
If you are given a problem with lengths of sides of a triangle, you can simply use Heron's formula to solve for the area. Heron's formula is as follows: `A = sqrt((s)(s-a)(s-b)(s-c))` where a, b, and c are lengths of a side of the triangle and `s = (a+b+c)/2` which is also known as the semiperimeter. To solve this problem, we must first solve for s. `s = (5+8+10)/2` `s = 23/2 = 11.5` Next, plug this into the original area formula `A =...http://www.enotes.com/homework-help/find-area-triangle-with-component-measurements-470144Sun, 27 Jul 2014 15:48:23 PSTWhen given with the lengths of the three sides of a triangle, it is...
http://www.enotes.com/homework-help/find-area-triangle-with-component-measurements-470144
When given with the lengths of the three sides of a triangle, it is better to use Heron's formula in solving its area. The Heron's formula is: `A =sqrt(s(s-a)(s-b)(s-c))` where a, b, and c are the lengths of the sides of the triangle and s is the semi-perimeter of the triangle. To apply that, solve for the semi-perimeter of the triangle. To do so, add the three sides and take half of it. `s=(a+b+c)/2 = (5+8+10)/2=23/2` `s=11.5` Then, plug-in...http://www.enotes.com/homework-help/find-area-triangle-with-component-measurements-470144#1Sun, 27 Jul 2014 07:35:50 PSTRemember that 2 negatives make a positive. Rewrite equ along those...
http://www.enotes.com/homework-help/what-steps-solving-x-this-equation-2x-6-8-212527
Remember that 2 negatives make a positive. Rewrite equ along those terms: 2x+6=8 Since this is addition, the opposite operation is..? (subtraction) -- Subtract both sides by 6: 2x=2 Opposite operation of multiplication? (Division) -- Divide both sides by 2 to isolate x: x=1http://www.enotes.com/homework-help/what-steps-solving-x-this-equation-2x-6-8-212527Sun, 27 Jul 2014 06:56:20 PSTWithout adding the numbers itself, 1.347 + 3.68 can not equal 50.27...
http://www.enotes.com/homework-help/integrated-algebra-help-279705
Without adding the numbers itself, 1.347 + 3.68 can not equal 50.27 because you have to line up the decimals before you add. Furthermore, if you rounded the numbers to the nearest whole number, 1+4=5. The answer should be around 5 not 50.27. http://www.enotes.com/homework-help/integrated-algebra-help-279705Sun, 27 Jul 2014 06:52:27 PST`0^(3)=0x0x0` When you multiply that together, it would still be 0. No...
http://www.enotes.com/homework-help/what-value-0-cube-239863
`0^(3)=0x0x0` When you multiply that together, it would still be 0. No matter what.http://www.enotes.com/homework-help/what-value-0-cube-239863Sun, 27 Jul 2014 06:49:18 PST (3a+b)(-2a-4b) To with FOIL-FIRST, OUTSIDE, INSIDE, LAST...
http://www.enotes.com/homework-help/what-correct-answer-3a-b-2a-4b-using-foil-method-267362
(3a+b)(-2a-4b) To with FOIL-FIRST, OUTSIDE, INSIDE, LAST Rewrite (3a+b)(-2a-4b) Use Foil (3a)(-2a)+(3a)(-4b)+(-2a)(b)+(b)(-4b) Simplify `-6a^(2)-12ab-2ab-4b^(2)` Combine like terms: `-6a^(2)-14ab-4b^(2)`http://www.enotes.com/homework-help/what-correct-answer-3a-b-2a-4b-using-foil-method-267362Sun, 27 Jul 2014 05:57:25 PSTAlthough math can be hard at times, practice makes it easier to...
http://www.enotes.com/homework-help/why-math-hard-465852
Although math can be hard at times, practice makes it easier to understand math. The more time and precision placed into math problems can give a positive outcome of giving you an easier experience with math. Keep practicing and trying hard, and Im sure you'll get it! http://www.enotes.com/homework-help/why-math-hard-465852Sun, 27 Jul 2014 05:52:44 PSTMath is essentially used in our daily lives. In: Money. To understand...
http://www.enotes.com/homework-help/why-math-such-an-important-part-our-lives-389103
Math is essentially used in our daily lives. In: Money. To understand currency Discounts/Sales Tax. To see how much you are charged for something Portion. To see how big something is Shapes. To understand why this is shaped this way Weight: To see how much you've gained or loss Time: To see how much time is taken/loss or gained from this experience Size: To measurehttp://www.enotes.com/homework-help/why-math-such-an-important-part-our-lives-389103Sun, 27 Jul 2014 05:49:55 PST WHAT DO WE KNOW A rectangle is four times as longer as it is wide....
http://www.enotes.com/homework-help/rectangle-four-times-longer-than-wide-perimeter-323658
WHAT DO WE KNOW A rectangle is four times as longer as it is wide. 4l=w The perimeter of the rectangle is 150m. P=150 m FORMULA FOR PERIMETER: P=2(l+w) Let's find the length first. Plug-in 4l for w in Perimeter formula & P=150 : 150=2(l+4l) Simplify/Combine like terms: 150=2(5l) Multiply: 150=10l Opposite operation for multiplication? (division)-- Divide 10 from both sides to isolate l: `150/10 = (10l)/10` Simplify: 15=l, or l=15...http://www.enotes.com/homework-help/rectangle-four-times-longer-than-wide-perimeter-323658Sun, 27 Jul 2014 05:39:19 PST