a + 2a - b = 3a - b
Yo, Taco....starts out as 'Friday' then morphs to 'Firdaus' .....
(a-9) / f = 2/7 f = 7/2 (a-9)
a / (f-9) = 7/11 f = 11/7 a + 9 equate the two 'f's
7/2 ( a - 9 ) = 11/7 a + 9
1 13/14 a = 40.5
a = 21 then you can easily solve for f = 7/2 ( a-9) = 42 dollars
1 job / combined rate = time required
1/ ( 1/8 + 1/12 + 1/9) = hours ( Note that 4320 is irrelevant)
The EXterior angles will be 180 - 162 = 18 degrees
EXterior angles sum to 360
360 / 18 = n
In 20 minutes after the temp changed to - 8 the temp will reach - 9
this could occur at 2:20 ( if - 8 was at 2:00) to 2:40 ( if temp was - 8 at 2:20)
so -9 will happen somewhere from 2:20 to 2:40 .... whenever 20 minutes after -8 C occurs
Start by multiplying both sides of the equation by (x-4)
then multiply both sides by (x+2) Note: this will rid the equation of the denominators
then expand and simplify
to solve you MAY have to use the Quadratic Formula (or factoring) ..... Post back here if you need more help...
If the temp is changing by -3 C every hour and it only gets to -8 C in the interval 2 - 2:20 it has not yet fallen to - 9 C so the temp - 9 C is not in the interval given.
5x + y = 31 subtract 5x from both sides of the equation
y = 31 - 5x substitute this value of 'y' into tht e second equation
3x + 4 ( 31 - 5x) = - 39 Now solve this equation for 'x' then y = 31 - 5x and you are done !
r = rabbits legs = 4r
c = chickens = 16 - r legs = 2 (16-r) summed they equal 54
4r + 2 (16-r) = 54 Now....can you solve for 'r' ?
