please tell me how to solve this qsn! for the second qsn that says \"what is the pressure of the gas, px?\" Assume atmoshperic pressure is 77 cm Hg http://i61.tinypic.com/2dam3ib.png\">

Please help.

1) Two Positive numbers are such that the sum of 11 times the square of the first number amd 13 times the cube of the second number is 395. If 218 is subtracted from 26 times the cube of the second number, the number obtained is 121 times the square of the first number. Find the two numbers.

2) some spiders, dragonflies and houseflies are kept in three separate enclosures. They have a total of 20 heads, 136 legs and 19 pairs of wings. Given that a spider has 8 legs and 0 wings, a dragonfly has 6 legs and 2 pairs of wings, and a housefly has 6 legs and 1 pair of wings, find
The number of spiders,
The number of dragonflies,
The number of houseflies.
(I found the answer but i want an algebraic method.)

3)A rooster costs $5 and a hen costs $3. Chicks are sold at 3 for $1. A farmer bought 100 birds of these three types for $100. How many of each type of bird did he buy? Hint: there are three possible answers.

Please provide algebraic answers!

M-Help:

http://i41.tinypic.com/nn30px.jpg\">

Thank you so much! My life saver!

could you please help me with these questions?

1. express 0.00315 - 4.26 x 10^-6 as a single number in standard form.
2. (a) Explain why it is possible to tell that (4.211 x 10^-3) / (6.465 x 10^-5) is a number greater than 1 without actually evaluating the sum.
(b) Express (4.211 x 10^-3) / (6.465 x 10^-5) in standard for correct to 3 significant figures.

babycutie71:

Hi,


Pls advise how to solve this question? Any model method?

Jia en paid a total of $80 for 2 dictionaries and 3 sets of stationery. Each dictionary cost $5 more than 2 sets of stationery. Find the cost of each dictionary.

hi.
$80=2D+3S
$80=(2S+$5)+(2S+$5)+3S
$80= 7S+$10
$80-$10=7S
$70=7S
$10=1S
1D=2S+$5
1D= $10+$10+$5
1D=$25

cheers:)

Fang and Ming set off from their school at the same time for piano lesson at a music school.In every minute,fang walked 80m,while ming cycled 200m.At the entrance of the music school,ming realised that he had forgotten to bring his piano scores.He cycled back along the same route to his home to get his scores.He cycled back along the same route to his home to get his scores.On his way back,he met fang at a place 300m away from the music school.How far away was their school from the music school?


Pls explain with the solution.

pinkapple:

Robertpattinsonidle:

Two squares, each s on a side, are placed such that the corner of one square lies on the centre of the other. Describe, in terms of s, the range of possible areas representing the intersections of the two squares

see if this helps u.
http://math.nie.edu.sg/mprose/elearning/qns/p14.aspx

are u doing ya NIE assignment btw?

I will check the link out. No I am doing my homework. Thanks

Two squares, each s on a side, are placed such that the corner of one square lies on the centre of the other. Describe, in terms of s, the range of possible areas representing the intersections of the two squares


PLease help!

Robertpattinsonidle:

Two squares, each s on a side, are placed such that the corner of one square lies on the centre of the other. Describe, in terms of s, the range of possible areas representing the intersections of the two squares.

PLease help solve this question urgently!

Two squares, each s on a side, are placed such that the corner of one square lies on the centre of the other. Describe, in terms of s, the range of possible areas representing the intersections of the two squares.