Bobby had 36 books in his locker. some were library books, some were textbooks, and the rest were telephone books. the number of library books and telephone books combined equals twice the number of textbooks. the number of textbooks and telephone books combined equals three times the number of library books. how many of each type of book were in bobby's locker?

Let x be the libaray books, y be the textbooks and z be the telephone books

x + y + z = 36 ...(1)

x + z = 2y

y =

y + z = 3x ...(3)

Plugging eq 2 into 1 and 3

x +

3x + 3z = 72 ...(4)

x + 3z = 6x

3z - 5x = 0 ...(5)

Subtract eq(4) from 5 and simplfy:

3x - (- 5x) = 72

3x + 5x = 72

8x = 72

x = 9

And, 3z = 5x

3z = 5(9)

z = 15

And, y =

y = 12

Hence, there are 9 libaray books, 12 textbooks and 15 telephone books in the locker.

oof cheaters cheat because they’re lazy that’s why i cheat xd

: )

step-by-step explanation:

the data of the detroit pistons in numerical order from least to greatest is 0.30, 0.37, 0.55, 0.62, 0.69, 0.72, 0.73, 0.75, 0.77, 0.78, 0.80, 0.81, 0.81, 0.83, 0.84, 0.89

the data of the miami heat in numerical order from least to greatest is 0.50, 0.50, 0.56, 0.57, 0.67, 0.72, 0.72, 0.72, 0.75, 0.75, 0.76, 0.81, 0.82, 0.90, 1.00, 1.00

the detroit pistons median : 1.52

the miami heat median: 1.47

the iqr of this data is 0.05