Zadanie 21 strona 41 wykonaj działania:

a) -4 razy 2 1/8

b) -3 1/7 : 11

c: 2 1/4 : (-1 1/2)

d) -1,21 + 5,1

e) -3,2 razy (-0,2)

f) 0,24 : (-0,4)

g) 2 3/4 razy (-0,5)

h) -2,3 - 1/3

i) -3,75 : (-1 1/4)

j) 1/3 : (-0,7)

daje naj

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation: