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21:3
9:3
3:1
there all a 3:1 ratio
Please see below solution:
Let x = number of books that Bryan reads2x for amanda = Amanda 3x - 4 for Colin Amanda = 5/8(Bryan + Colin)2x = 5/8(x+3x-4)2x = 5/8(4x-4)
[16x = 5(4x-4)]816x = 20x - 20Subtract 20x from each side-4x =-20-4x/-4= -20/-4 divide -4 to eliminate the -4 in -4xx = 5
Therefore:
Bryan reads 5 books a month.
Since Amanda reads twice as many books a Bryan read so Amanda 10 books a month.
And Colin 11 books a month. 3(5) - 4 = 11
Answer:
2 x+3 y and 3 x+ 2 y
Step-by-step explanation:
Let x represents the number of roast beef and y represents the number of turkey sandwiches.
Let r and t represent cost of the roast beef and sandwich.
Platter A:
Platter A has 2 roast beef and 3 turkey sandwiches. So, equation is 2 x+3 y.
Total cost of the platter = 2 r x+3 t y
Platter B:
Platter B has 3 roast beef and 2 turkey sandwiches. So, equation is 3 x+2 y.
Total cost of the platter = 3 r x+2 t y
So, the two equations are 2 x+3 y and 3 x+ 2 y.
