A disc jockey must play 14 commercials during 1 hr of a radio show, each commercial is either 30 seconds or 60 seconds long if the total commercial time durring 1 hr is 11 min how many 30 sec commercials were played that hour?

Question

nikita2 · Answer

x*30 + y*60 = 11*60 sec.
x+y=14

nikita2 · Answer

http://www.wolframalpha.com/input/?i=x*30+%2B+y*60+%3D+11*60%2C+x%2By%3D14

nikita2 · Answer

x = 6,   y = 8

anonymous · Answer

so how many 30 sec commercials

nikita2 · Answer

6

anonymous · Answer

what about 60 sec com

nikita2 · Answer

8

anonymous · Answer

thank you can you help me with just a couple more please ?

nikita2 · Answer

if i could )

anonymous · Answer

ok thank u :)

anonymous · Answer

Snookers lumber can convert logds into either lumber or plywood in a given day the mill turns out twice as many units of plywood as lumber it makes a profit of $25 on a unit of lumber and $10 on a unit of plywood how many of each unit must be produced and sold in order to make a profit of 12750?

nikita2 · Answer

x*10 + y*25 = 12750 x=2y http://www.wolframalpha.com/input/?i=x*10+%2B+y*25+%3D+12750%2C+x%3D2y so x = 1700/3, y = 850/3

anonymous · Answer

SO HOW MUCH PLYWOOD AND HOW MUCH LUMBER

nikita2 · Answer

Oh, x is amount of  PLYWOOD and y is amount of LUMBER

anonymous · Answer

ok ty so much can u help me with a few more

nikita2 · Answer

let's try)

anonymous · Answer

snookers lumber can convert logs into either lumber  or plywood in a given day the mill turns out twice as many units of plywood  as lumber it makes  a profit of 30 dollars on a unit of lumber and 45 $ on a unit of plywood  how many of each unit of lumber and units of plywood to make a profit of 12240?

anonymous · Answer

another one im having a hard time with are  5x+5y=13
7x+89=y use substitution method

anonymous · Answer

the other one is 8x-9y=24.5
7y-2x=8.5 what is the solution

anonymous · Answer

I think nikita deserves a couple of medal here. :)

anonymous · Answer

5x+5y=13
7x-2y+19 what is the solution type an ordered pair or integer or fraction simplify for all

anonymous · Answer

5x-6y=16
7x+89=y what is the solution to the ordered pair  use substitution method

nikita2 · Answer

x + y = 13/5
7x - y = 89

x + y = 13/5
6x + 0 = 89 -13/5 => x = (89 - 13/5)/6 

y = 13/5 - x => y = 13/5 - (89 - 13/5)/6

anonymous · Answer

is this for the word problems

nikita2 · Answer

it is for  another one im having a hard time with are  5x+5y=13
7x+89=y use substitution method

nikita2 · Answer

for word problem :
x*45 + y*30 = 12240
x=2y

and x = 204,   y = 102

anonymous · Answer

ok so 204 stands for what and 102 is what

nikita2 · Answer

x is amount of  PLYWOOD and y is amount of LUMBER

anonymous · Answer

ty :)