Mathematics - 28 August 2006

2006-08-28 13:22:04 · 8 answers · asked by scooby doo 4

If the class grade is 40% based on your project, and 60% on your exam, and the student gets an 86% on her project, what must she get on her exam to get an overall 90% in the class?

2006-08-28 13:02:49 · 10 answers · asked by Raquel S 1

Find the volume of the solid that is generated by rotating the region formed by the graphs of y=2x^2 and y=4x about the line x=3.

2006-08-28 12:54:34 · 2 answers · asked by Yogi_Bear_79 3

Use the method of cylindrical shells to find the volume of the solid rotated about the line x = -1 given the conditions: y=x^3 -x^2; y=0; x=0.

2006-08-28 12:52:27 · 2 answers · asked by Yogi_Bear_79 3

X EQUAL MINUS B +OR-SQUARE ROOTS OF BSQUARE-4AC ALL OVER 2A

2006-08-28 12:49:57 · 14 answers · asked by swetlana16 2

X is at least 30.

2006-08-28 12:38:01 · 6 answers · asked by crazy286 2

Cashews sell for $1.20 per quarter-pound,and brazil nuts sell for $1.50 per quarter-pound.How many pounds of cashews should be mixed with 20 pounds of brazil nuts to get a mix that sells for $1.30 per quarter-pound?


Thank you! I have no idea how to do this stuff

2006-08-28 12:28:17 · 7 answers · asked by laurali_love 3

2006-08-28 11:53:36 · 8 answers · asked by neal f 1

2006-08-28 11:52:58 · 22 answers · asked by Anonymous

between any 2 real #'s "a" & "b" there is always another real #. how can you find the other #?

could you possibly find it via the midpoint formula? just a thought.
thanks for the help.

2006-08-28 11:51:06 · 6 answers · asked by shih rips 6

a flag in the shape of an isosceles triangle has a base that is 3.5 inches shorter than either of the equal sides. If the perimeter of the triangle is 49 inches, what is the length of the equal sides?

2006-08-28 11:47:01 · 6 answers · asked by laurali_love 3

two ships leave the same harbor at the same time. the first ship heads north at 20mph and the second ship heads weat at 15mph. what is the expression that gives the distance "d" between the ships after "t" hours?

i'm a bit confused. do i need to use the distance formula and the "speed=distance/time" formula to solve this?

thanks for the help. i really appreciate it.

2006-08-28 11:41:29 · 9 answers · asked by shih rips 6

I did the problem and came out to -6.. but my friend says it is incorrect.. so could you show me the work.. i can come up with the answer..

also my last problem was this one.. I cant seem to find the answer..

A trapezoid has bases of length x meters and (x + 6) meters. Its height is 4 meters. Find the lengths of the bases if the area is 64 square meters. The formula for the area of the trapezoid is: 1/2 (base+base)h

Thanks for ur help ill return the favor!!

2006-08-28 11:36:20 · 6 answers · asked by NicNak 1

suppose five bales of hay are weighed two at a time in all the possible ways. the wieghts in pounds are 110, 112, 113, 114, 115, 116, 117,118,120,121 how much does each bale of hay weigh?

2006-08-28 11:35:26 · 2 answers · asked by rushin_13 2

mr.germany, mr.egypt,and mr. brazil recently went on seperate vacations to a single destination. One of them went on vacation to germany, one to egypt, and one to brazil. If exactly one of the following statements is true, who went where?

1. mr brazil went to germany
2. mr brazil did not go to egypt
3. mr germany did not go to egypt
4. mr germany did not go to brazil

2006-08-28 11:14:12 · 14 answers · asked by rushin_13 2

2006-08-28 11:10:37 · 3 answers · asked by nerd.:) 4

(4b, b) , (3b, 0)

i know how the plug the "x's" and "y's" into the distance formula, but how do you solve it? when you don't know what b is equal to? please explain. thanks for your help.

2006-08-28 11:04:55 · 4 answers · asked by shih rips 6

please excuse my dear aunt sally

2006-08-28 10:56:34 · 4 answers · asked by Kaleb S 1

here is an example=Q:twenty-four more then some number is 31

A: 24+n=31(pretty simple....)

2006-08-28 10:55:02 · 7 answers · asked by Anonymous

2006-08-28 10:33:03 · 37 answers · asked by InnerGuard 2

1 milligram equals ________g

1 Centiliter equals_______L

1 Decimeter equals________m

1 decigram equals_________g

1 hectoliter equals__________L

1 Hectogram equals_______g

1 kiloliter equal_______L

2006-08-28 10:29:58 · 7 answers · asked by ♥Mrs.SweetLove♥ 6

a lake covers 928 acres w/ an avg depth of 17 ft. estimate the # of cubic feet of water in the lake. if 1 cubic ft = 7.48 gallons, approximate the # of gallons of water in the lake.

i know i have to convert using 1 acre=43,560 squared ft.
thanks for the help.

2006-08-28 10:27:37 · 5 answers · asked by shih rips 6

U tell me am I wrong math is hard. I mean math just brings out the angery side of me. Sometimes I can pick it up quick,but most of the time I can't,and the older I get it seems like it's just getting impossible.

2006-08-28 10:24:00 · 12 answers · asked by Anonymous

we're still doing this review thing and, once again, i have forgotten something i learned years ago. (i always seem to forget the simplest things)
ok. so how do i find the maximum area for a given perimeter of a rectangle? i need to state the length and width of the rectangle. i need to do it for the following:

- 25 mm
-18 yards
-42 cm

but if you could breifly/simply walk me through it to refresh my memory, that'd be great too.

2006-08-28 10:22:27 · 7 answers · asked by yep 2

speed of light is about 186,000 mi/sec. the milky way galaxy has an approx diameter of 6x10 ^17 mi. estimate the # of years it would take the light to travel across th milky way.

thanks for the help.

2006-08-28 10:21:20 · 3 answers · asked by shih rips 6

i'm having trouble with this word problem. i know there's 2-steps to solve it. thanks for the help.

table 1.2
year--> 1960, 1965, 1970, 1975, 1980, 1985, 1990, 1995, 2000
CPI--> 29.6, 31.5, 38.8, 53.8, 82.4, 107.6, 130.7, 153.5, 172.2

use table 1.2 to estimate the percent change in prices from 1965 to 1995. in 1965 a gallon of gas cost about $0.30. if this price had kept pace w/ the CPI, what would a gallon of gas have cost in 1995?

2006-08-28 10:08:25 · 4 answers · asked by shih rips 6

That is, the area of the arc, under the chord. I only know the diameter of the circle: 1.5'. And the height from the bottom of the circle, perpendicular to the chord: 1'.

2006-08-28 09:36:37 · 4 answers · asked by jfahd 4

2006-08-28 09:29:08 · 4 answers · asked by Anonymous

How do you do that.. please show me the work and I could figure out the answer...

and my last question is..,

-55-4n=13

2006-08-28 09:28:11 · 6 answers · asked by <3Priscyla 2

I don't mind learning algebra and calculus I just do think I should get failed just because I don't do it right a couple of times.I mean do u even use it like when u go to the store no. Then again I wouldn't really know about spending money cause I'm broke.

2006-08-28 09:12:32 · 14 answers · asked by Anonymous