Ineed to have this done in 15 ! brainliest get 40 ! no work ! just 1) (45+3 3/5 )·0.6 2) (4÷ 4/7) ∙0.3 / (2.88÷4.8) 3) 2 1/7 : (15a)= 5/14 : (0.8) 4) 3x−1/5 = x+1/3 5)(0.3d−1) / (3 1/3)=0.84: 7/15

1) 29.16

2) 7/2

3) a = 8/25  

4) x = 4/15  

5) d = 23 1/3

Step-by-step explanation:

1) (45+3 3/5 )·0.6 = 48 3/5·0.6  = 29.16

2) (4÷ 4/7) ∙0.3 / (2.88÷4.8)   = (4 ∙7/4)∙0.3 / 0.6  = 7/2

3) 2 1/7 :(15a)= 5/14 :(0.8)

2 1/7 ∙0.8 = 5/14 ∙15a

1 5/7 = 5 5/14 a

1 5/7 : 5 5/14 = a

8/25 = a

4) 3x−1/5 = x+1/3

-1/5 - 1/3 = x - 3x

-8/15 = -2x

-8/15 : -2 = x

4/15 = x

5)(0.3d−1) / (3 1/3)=0.84: 7/15

(0.3d−1) =0.84: 7/15  ∙ 3 1/3

0.3d = 6 + 1

d = 7 :  0.3

d = 23 1/3

it would open into a square depending on the type of envelope i’m not sure about the second part