Science & Mathematics - 5 January 2007

At a school-sponsored car wash, the fees charged were : $5 per car, $8 per pickup truck and $10 per full-sized van. Twice as many cars were washed as pickup trucks. The amount collected for washing cars and pickup trucks was $360. A total of $410 was collected at the car wash.

Let c represent the number of cars washed, t represent number trucks washed, and v represent number of vans washed. Write a system of 3 equations that represents the number of vehicles washed. Find the number of cars washed.

I am mainly having a hard time figuring out how to write the system of equations. Help!!

Thanks so much!

2007-01-05 05:02:23 · 8 answers · asked by Katie 1 in Mathematics

2007-01-05 05:00:36 · 7 answers · asked by Pete C 1 in Mathematics

parents picking the traits of their offspring

2007-01-05 04:59:32 · 1 answers · asked by Anonymous in Biology

2007-01-05 04:59:24 · 6 answers · asked by Lindsay W 1 in Botany

2007-01-05 04:56:56 · 3 answers · asked by Anonymous in Other - Science

Construct a frequency distribution using six classes.

23 30 20 27 44 26 35 20 29 29
25 15 18 27 19 22 12 26 34 15
27 35 26 43 35 14 24 12 23 31
40 35 38 57 22 42 24 21 27 33

Pleeease help.

2007-01-05 04:56:23 · 1 answers · asked by Anonymous in Mathematics

I think i know butnot sure they say that the Mayas know when we all die i watched history but not that one. =]

2007-01-05 04:54:31 · 16 answers · asked by Anonymous in Astronomy & Space

2007-01-05 04:53:54 · 2 answers · asked by kana f 1 in Physics

I have several 10 kg tanks and am not using them and I am wondering if they will ever go bad?

2007-01-05 04:53:10 · 5 answers · asked by Anonymous in Chemistry

2007-01-05 04:52:51 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Is it some type of conscience energy that projects the "details" we see in life. As we zero in on what matter is made of it occurs to me, things are zooming around spaces, and in those things things are zooming around, and so on. Does anything really exist? If not, why is our physical reality so difficult to break?

2007-01-05 04:51:57 · 8 answers · asked by freeorbit2000 1 in Physics

2007-01-05 04:50:35 · 12 answers · asked by Anonymous in Earth Sciences & Geology

2007-01-05 04:48:55 · 5 answers · asked by ameeeeeeeeeeeeeeeet 2 in Botany

2007-01-05 04:47:38 · 18 answers · asked by Anonymous in Other - Science

from scarabaeidae family but any will do :)

2007-01-05 04:47:35 · 5 answers · asked by Ronja 1 in Zoology

2007-01-05 04:47:18 · 2 answers · asked by ameeeeeeeeeeeeeeeet 2 in Biology

The Q says the curve C has equation y = 4x^2 - 7x +11 and the line L has equation y = 5x + k
Where k is a constant. Given that L intersects C in two distinct points show that k > 2

Ive tried everything and cannot get to the answer. please help!

2007-01-05 04:46:21 · 2 answers · asked by Anonymous in Mathematics

2007-01-05 04:45:50 · 4 answers · asked by proconium 1 in Earth Sciences & Geology

I live in Philadelphia and I know this region is not the only one suffering from such a warm winter. 75% of the US is unseasonably warm and my question is why? The weather people have not given me any answers at all, they don't even address it. It's really bothering me, anybody know the answer?

2007-01-05 04:44:51 · 17 answers · asked by Anonymous in Weather

2007-01-05 04:44:41 · 4 answers · asked by Anonymous in Biology

the least possible value thatcan be taken on by the smaller of these two squares?

2007-01-05 04:44:01 · 3 answers · asked by Surjith 1 in Mathematics

2007-01-05 04:43:23 · 7 answers · asked by Anonymous in Earth Sciences & Geology

Blck or White (which one will make somhting hot or cold)

2007-01-05 04:43:01 · 5 answers · asked by Anonymous in Other - Science

2007-01-05 04:42:44 · 9 answers · asked by abc123 1 in Astronomy & Space

2007-01-05 04:41:45 · 4 answers · asked by ravi j 1 in Botany

2007-01-05 04:41:12 · 12 answers · asked by abc123 1 in Biology

squamous epithelium, cuboidal epithlium, columnar epithlium, pseudostratified epithlium, compound epithlium, neurons, synapses and motor end plate, cartilage, bone, skeletal muscle, visceral muscle, cardiac muscle.

2007-01-05 04:38:15 · 6 answers · asked by Anonymous in Biology

2007-01-05 04:37:21 · 10 answers · asked by papa dan 1 in Other - Science

2007-01-05 04:36:18 · 6 answers · asked by sonuvabitch 2 in Biology

2007-01-05 04:35:20 · 10 answers · asked by sonuvabitch 2 in Botany