$x-\ botlle\ A\\y-\ bottle\ B\\\\ \left \{ {{x+y=84} \atop {6,5x+8,25y=588}} \right. \\\\ \left \{ {{x=84-y} \atop {6,5x+8,25y=588}} \right. \\\\Substitution\ method\\\\
6,5(84-y)+8,25y=588\\\\
546-6,5y+8,25y=588\ \ \ | subtract\ 546
1,75y=42\ \ \| divide\ by\ 1,75\\\\y=24\\\\There\ were\ 24\ bottles\ B\ and\ 42\ bottle\ A.$

6 0

2 years ago

A teacher randomly assigns her 30 students 4-digit I.D. numbers using the digits 0 to 9. No digits are repeated within an ID num

Olin [163]

The number of ways 4 digit numbers can be forms using the digits 0 to 9 with no number repeated is given by

$^{10}P_4= \frac{10!}{(10-4)!} = \frac{10!}{6!} =10\times9\times8\times7=5,040$

The probability that one of the numbers is 9876 is given by $\frac{1}{5,040}$

7 0

2 years ago

Read 2 more answers

Dado un triángulo rectángulo cuyo perímetro es de 48 cm, la diferencia entre su lado mayor y su lado menor es de 8 cm y su área

lesya692 [45]

Answer:

5471002836nmcncm.....

5 0

2 years ago