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Recent problems solved by 'mathnoob'

mathnoob answered: 8 problems

Functions/107562: Term Of Number What's the rule? Numerical Value Of Term
0 11
2 23
4 35
n

1 solutions

Answer 78374 by mathnoob(8) on 2007-11-01 23:52:19 (Show Source):

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Please ask your question properly so i can answewr

Travel_Word_Problems/107538: This question is from textbook Algegra 1
Chris has riden her bike 10 miles. She averages 12 mi/hr. How many more minutes must she ride before she has traveled 60 miles?
1 solutions

Answer 78366 by mathnoob(8) on 2007-11-01 22:37:05 (Show Source):

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Chris has riden her bike 10 miles. She averages 12 mi/hr. How many more minutes must she ride before she has traveled 60 miles?
You must provide more detail so i can help you

Radicals/107576: 4.7=x^1/3
1 solutions

Answer 78362 by mathnoob(8) on 2007-11-01 22:31:35 (Show Source):

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4.7=x%5E%281%2F3%29

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First you have to Cube the both side meaning:
4.7%5E3=x%5E%281%2F3%29%5E3

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Then you will get
103.823=x

Rectangles/14137: A RECTANGLE HAS A SQUARE CUT FROM IT.
THE PART LEFT BEHIND (ANOTHER RECTANGLE) IS SIMILAR TO (THAT IS, SCALED VERSION OF) THE ORIGINAL RECTANGLE.
IF THE BREADTH OF THE ORIGINAL RECTANGLE IS 1 WHAT IS THE LENGTH (TO 3 DECIMAL PLACES)?
COULD YOU PLEASE HELP ME TO GO ABOUT ANSWERING THE ABOVE MATHS PROBLEM?
THE ANSWER I GET IS 1.134 IS THAT CORRECT!
PLEASE HELP!
1 solutions

Answer 78358 by mathnoob(8) on 2007-11-01 22:26:35 (Show Source):

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Please do not use cap lock to type it is very rude to the tutor please rephase the question then i can help

Radicals/107574: 2^(x-1)=64
1 solutions

Answer 78347 by mathnoob(8) on 2007-11-01 22:03:52 (Show Source):

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2%5E%28x-1%29=64

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Removing Base 2 on both side we get:
x-1=6
Thus,x=7
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Hope this help, By: Mathnoob

Linear-equations/107573: 2x-y=4
6x+3y=-18

1 solutions

Answer 78342 by mathnoob(8) on 2007-11-01 21:25:45 (Show Source):

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Lets name the equation
2x-y=4 ----------- 1
6x+3y=-18 ----------- 2
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From equation 1
y=2x-4 ----------- 3
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Subsititue equation 3 into equation 2
6x+3(2x-4)=-18
6x+6x-12=-18
12x=-6
x= -1%2F2

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Subsititue x into equation 3
y= 2%28-1%2F2%29-4

=-1-4
=-5
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Good Luck, By: Mathnoob

percentage/104583: This question is from textbook Foundations for Algebra Year 2-volume one
write the approximate percent for the following fractions.
a.25/32 b.17/40 c.75/120 d.36/140

1 solutions

Answer 78337 by mathnoob(8) on 2007-11-01 21:04:55 (Show Source):

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(a) 25%2F32

* 100 =78.13%
(b) 17%2F40%29

*100=42.5%
(c) 75%2F100

*100=62.5%
(d)) 36%2F140

*100=25.71%

Linear-equations/107419: How do I solve by elimination: X-4Y=-23
2X+3Y=9
1 solutions

Answer 78211 by mathnoob(8) on 2007-11-01 05:58:59 (Show Source):

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multiply first equation by 2
2x-8y=-46
(2x+3y)-(2x-8y)=9-(-46)
2x+3y-2x+8y=55
11y=55
y=5
sub y into the first equation in your question we get
x-4(5)=-23
x-20=-23
x=-3

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Recent problems solved by 'mathnoob'