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Recent problems solved by 'elima'

elima answered: 1432 problems
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Exponents/97994: Simplify. Use positive exponents.
(3x^-3 X x^6)/y^-2
1 solutions

Answer 71306 by elima(1433) on 2007-09-13 19:37:52 (Show Source):

You can put this solution on YOUR website!
%283x%5E-3%29%28x%5E6%29%2Fy%5E-2

I believe this to be the actual problem?
Negative exponents turn integers into fractions, and if they are already in the denominator they are flipped into the numerator.
%28x%5E6%29%28y%5E2%29%2F3x%5E3

Now you cancel the x's, you have six in the numerator and 3 in the denominator,
%28xxxxxx%29%28y%5E2%29%2F3xxx

cancel out three, and you are left with;
x%5E3y%5E2%2F3

Linear-systems/97849: This question is from textbook
if five times the smaller of two consecutive integers is added to three times the larger, the result is 59. find the integer
1 solutions

Answer 71266 by elima(1433) on 2007-09-13 12:21:04 (Show Source):

You can put this solution on YOUR website!
Let x be the smaller number;
x+1 is the larger number;
5x+3(x+1)=59
5x+3x+3=59
8x=59-3
8x=56
x=7
x+1=8
So the numbers are; 7,8
:)

Functions/97851: how do i make an input-output table for a function?

1 solutions

Answer 71263 by elima(1433) on 2007-09-13 11:45:01 (Show Source):

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You choose a value for x and solve the function for your output(y).
:)

Equations/97856: 1-1/8z=z-3/4
1 solutions

Answer 71235 by elima(1433) on 2007-09-13 09:48:38 (Show Source):

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1-1/8z=z-3/4
first add 3/4 and 1/8z to both sides;
1+3/4=z+1/8z
1 3%2F4

z
I like to turn mixed fractions into improper;
7%2F4

z
divide each side by 9%2F8

=z
:)

Expressions-with-variables/97802: How do you solve 4x-y=19? Do you replace in the x and then a y with any #?
1 solutions

Answer 71184 by elima(1433) on 2007-09-12 20:55:53 (Show Source):

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You choose a value for one of the variables and then solve the equation for the other.
4x-y=19
choose a value for x;
x=1
4(1)-y=19
4-y=19
-y=15
y=-15
If you are asked to graph, then you should choose at least 3 values for x and then solve for y.
:)

expressions/97738: This question is from textbook algebra1
2x+3x+5-4=25
what is the main answer
1 solutions

Answer 71174 by elima(1433) on 2007-09-12 20:32:18 (Show Source):

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2x+3x+5-4=25
Collect like terms;
5x+1=25
subtract 1 from both sides;
5x=24
divide each side by 5;
x=24%2F5

Functions/97756: IS this a function?
{(3,7),(3,8),(3,-2),(3,4),(3,1)}

1 solutions

Answer 71171 by elima(1433) on 2007-09-12 20:29:01 (Show Source):

You can put this solution on YOUR website!
No, because you can not have the same values for your x.
:)

Equations/97753: This question is from textbook HOLT PRE-ALGEBRA
n/3-4=1
1 solutions

Answer 71169 by elima(1433) on 2007-09-12 20:27:14 (Show Source):

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n%2F3-4=1

Add 4 to both sides;
n%2F3=5

multiply each side by 3;
n=5*3
n=15
:)

Miscellaneous_Word_Problems/97752: the sum of two consecutive positive integers is less than or equal to 10. Find the integers.
1 solutions

Answer 71168 by elima(1433) on 2007-09-12 20:24:04 (Show Source):

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Let x be the first positive integer
x+2 is the next positive integer
x%2Bx%2B2%3C=10

so your fist positive integer = 4
4+2=6 the second positive integer
:)

Graphs/97739: I got this wrong on my homework and would appreciate if you could go over it.
The question reads, find the slope and y-intercept of each line. Graph the line by hand. I also needed a x y chart. -x+3y=6
1 solutions

Answer 71165 by elima(1433) on 2007-09-12 20:18:38 (Show Source):

You can put this solution on YOUR website!
All the tutors do not have the same book as you, so you should post the problem.
:)

Numbers_Word_Problems/97742: Of the three consecutive integers, the sum of the smallest two integers is equal to 33 less than three times the largest. Find the integers.
1 solutions

Answer 71117 by elima(1433) on 2007-09-12 17:44:12 (Show Source):

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Let the first integer = x
the next one = x +1
the third = x+2
x+(x+1)=3(x+2)-33
2x+1=3x+6-33
2x-3x=6-33-1
-1x=-28
x=28
1st integer = 28
second = 29
third = 30
check:
28+29=3(30)-33
57=57
:)

test/97732: find the total surface area of a cylinder with a radius 3 and height 8.
1 solutions

Answer 71115 by elima(1433) on 2007-09-12 17:34:42 (Show Source):

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SA = 2%28pi%29r%5E2+%2B+2%28pi%29rh

substitute;
SA= 2%28pi%293%5E2+%2B+2%28pi%29%283%29%288%29

SA =

SA =

SA = 56.52 + 150.72
SA = 207.24
:)

Linear-systems/97731: x-2y=6

1 solutions

Answer 71114 by elima(1433) on 2007-09-12 17:29:02 (Show Source):

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x-2y=6
To solve this you choose values for x and solve for y;
when x = 2;
(2)-2y=6
-2y=4
y=-2
x=2, y =-2
If you need to graph, you should choose at least 3 values for x.
:)

test/97724: a rectangular solid with a length 8 and width 2 has volume 48. find its height.
1 solutions

Answer 71110 by elima(1433) on 2007-09-12 16:52:30 (Show Source):

You can put this solution on YOUR website!
V=lwh
48=(8)(2)h
48=16h
48%2F16

=h
h=3
:)

test/97723: what is the volume of a cube with the edge of 2?
1 solutions

Answer 71109 by elima(1433) on 2007-09-12 16:49:38 (Show Source):

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V= s%5E3

V=8
:)

Geometry_Word_Problems/97721: The length of a rectangular playing field is 5 feet less than it's width. If the perimeter of the playing field is 230 feet, find the length and width of the field.
1 solutions

Answer 71108 by elima(1433) on 2007-09-12 16:47:31 (Show Source):

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P=2(L+W)
P=230
L=w-5
230=2(w-5+w)
230=2(2w-5)
230=4w-10
240=4w
60=w
L=60-5=55
:)

test/97719: i have to find the volume of a sphere with a radius 3 cm.
i have to leave answer in terms of pie.
1 solutions

Answer 71107 by elima(1433) on 2007-09-12 16:41:36 (Show Source):

You can put this solution on YOUR website!
V= %284%2F3%29%28pi%29r%5E2

test/97718: i have to find the volume of a right cone with a radius 6 cm and height 10 cm.
i have to leave answer in terms of pie.
1 solutions

Answer 71106 by elima(1433) on 2007-09-12 16:31:34 (Show Source):

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V= %281%2F3%29%28pi%29r%5E2h

test/97717: i have to find the volume of a right cylinder with a radis 4 cm and height 7 cm.
i have to leave answer in terms of pie.
1 solutions

Answer 71104 by elima(1433) on 2007-09-12 16:18:48 (Show Source):

You can put this solution on YOUR website!
V = %28pi%29r%5E2h

Inverses/97768: k-13=18
1 solutions

Answer 71102 by elima(1433) on 2007-09-12 16:13:54 (Show Source):

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k-13=18
add 13 to both sides;
k-13+13=18+13
k=31
:)

test/97716: i have to find the volume of a rectangular square pyramid with a base edge 4 and height 6 m.
1 solutions

Answer 71101 by elima(1433) on 2007-09-12 16:12:34 (Show Source):

You can put this solution on YOUR website!
V= %281%2F3%29BH

V=8
:)

test/97714: i have to find the total area of a cube with edge 4.
1 solutions

Answer 71100 by elima(1433) on 2007-09-12 16:08:08 (Show Source):

You can put this solution on YOUR website!
SA = 6s%5E2

SA =

SA =

test/97711: i have to find the volume of a rectanglar solid with a lenth 8, width 4, and height 2.

1 solutions

Answer 71099 by elima(1433) on 2007-09-12 16:00:54 (Show Source):

You can put this solution on YOUR website!
v=lwh
v = (8)(4)(2)
v = 64
:)

Proportions/97507: adults and=or students = 2/15 = x/180
1 solutions

Answer 70996 by elima(1433) on 2007-09-11 20:26:48 (Show Source):

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adults/students = 2/15 = x/180
You need to cross multiply to solve;
2*180=15x
360=15x
Divide each side by 15
360%2F15=15x%2F15

24=x
:)
-
(23293) i got 0.13

Proportions/97480: state weather the ratios are proportional
1. 50 over 40 equal 5 over 4
2. 12 to 11, 36 to 33
3. 20:40, 1:2
4. 33 over 36 equals 44 over 48
1 solutions

Answer 70994 by elima(1433) on 2007-09-11 20:19:22 (Show Source):

You can put this solution on YOUR website!
They are proportional if when you cross multiply they equal;
1. 50 over 40 equal 5 over 4
50%2F40=5%2F4

50*4=200
40*5=200
2. 12 to 11, 36 to 33
12%2F11=36%2F33

12*33=396
36*11=396
3. 20:40, 1:2
20%2F40=1%2F2

20*2=40
1*40=40
4. 33 over 36 equals 44 over 48
33%2F36=44%2F48

33*48=1584
44*36=1584
They are all proportions
:)

Expressions-with-variables/97592: write an algebraic expression for 6 more than twice m

1 solutions

Answer 70992 by elima(1433) on 2007-09-11 20:13:33 (Show Source):

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2m+6
:)

Proportions/97481: can you please help me with my homework. create a proportion from each set of numbers
1. 12,36,1,3
2. 11,6,33,18
3. 8,48,30,5
4. 33,22,3,2
1 solutions

Answer 70990 by elima(1433) on 2007-09-11 20:12:40 (Show Source):

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1. 12,36,1,3
12%2F36=1%2F3

2. 11,6,33,18
11%2F6=33%2F18

3. 8,48,30,5
8%2F48=5%2F30

4. 33,22,3,2
33%2F22=3%2F2

Square-cubic-other-roots/97483: This question is from textbook Beginning Algebra
I am having a little trouble with this problem.
Find the perimeter of the triangle.
Side 1 = 4
Side 2 = sqrt 5 - sqrt 3
Side 3 = sqrt 5 + sqrt 3
The perimeter would equal 4 + sqrt5 - sqrt3 + sqrt5 + sqrt3
1 solutions

Answer 70986 by elima(1433) on 2007-09-11 20:06:13 (Show Source):

You can put this solution on YOUR website!
The perimeter would equal 4 + sqrt%285%29+-+sqrt%283%29+%2B+sqrt%285%29+%2B+sqrt%283%29

Now collect like terms;
4 + ( sqrt%285%29%2Bsqrt%285%29

)+(

)
4 +

Proportions/97487: can you help me with the following questions thanks
write each ratio in simpiest form
1. 65 to 65
2. 32 to 26
3. 30 over 50
4. 57:60
1 solutions

Answer 70982 by elima(1433) on 2007-09-11 19:55:30 (Show Source):

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1. 65 to 65 = 65%2F65

=1
2. 32 to 26 = 32%2F26

3. 30 over 50= 30%2F50

4. 57:60=

Signed-numbers/97491: Find the value of the expression
1 solutions

Answer 70976 by elima(1433) on 2007-09-11 19:45:12 (Show Source):

You can put this solution on YOUR website!
It is a good idea to post your problem, because we do not all have the same book.

Inequalities/97275: Hello out there,I rally need some help with some problems,the first one is,Write an inequality to describe a number greater than three.The next one is,Write an inequality to describe a number less than or equal to -2.The next one is,Solve the inequality:y+4>-2.And the last one is,Solve the inequality:x-3<5.Thanks for whoever can help.
1 solutions

Answer 70812 by elima(1433) on 2007-09-10 20:04:42 (Show Source):

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Write an inequality to describe a number greater than three.The next one is,Write an inequality to describe a number less than or equal to -2.The next one is,Solve the inequality:y+4>-2.And the last one is,Solve the inequality:x-3<5
1) x>3
2) x%3C=-2

3)y+4>-2
subtract 4 from both sides;
y>-6
4)x-3<5
add 3 to both sides;
x<8
:)

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Recent problems solved by 'elima'