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2 answers:
Answer:
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
1. 29.16
2. 3.5
3. a=0.32
4. 2/15
5. d= 23.33333333 ( am assuming this is a repeating decimal)
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