Maria spent 3/7 of her money on books, 1/4 of it on pen and 1/8 of it on a magazime. she had #11 left. how much did she have before she bought these things

56

Step-by-step explanation:

Let the x be the amount of money Maria had.

3/7 + 1/4 + 1/8 = 45/56

She spend 45/56 of x.

∴ 45/56 × x = (45/56)x

1 -  45/56 = 11/56

(11/56)x is the money that was left.

This is equivalent to 11.

(11/56)x = 11

11x = 11×56

11x = 616

x = 616/11

  = 56.

Maria had #56.

that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour