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Răspunsuri la întrebare
Răspuns:
Explicație pas cu pas:
2. a+b/2=83,54
89,28+b/2=83,54
83,54×2=167,08( 167,08 este suma lui a si b)
167,08-89,28=77,8( b ul)
89,28+77,8/2=167,08/2
= 83,54
3.
a+b+c/3=147,13
137,1+146,16+c/3=147,13
147,13×3=441,39 (suma lui a,b si c)
137,1+146,16=283,26(suma lui a si b)
441,39-283,26=158,13(c ul)
4
a+b+c/3=160,52
143,1+b+c/3=160,52
160,52 ×3=481,56(suma lui a,b si c)
481,56- 143,1=338,46(suma lui b si c)⇒Media aritmetica a nr b si c este egala cu:338,46/2
=169,23
5
( 5,6 ×1,2)+(18÷4)/2=6,72+4,5/2
=11,22/2=5,61
6.
a+b+c/3=26,5⇒a+b+c=26,5 ×3=79,5
d+e+f+g/4=17,12⇒ d+e+f+g=17,12 ×4=68,48
a+b+c+ d+e+f+g/7=79,5+68,48/7
=147,98/7=21,14
7.
a+b/2=24,12
a=3b
3b+b/2=24,12
4b=24,12 ×2
4b=48,24
b=48,24/4
b=12,06⇒ a=3 ×12,06
a=36,18
8
a+b/2=24,12
b=a/2
a+a/2/2=24,12
a+a/2=24,12 ×2
a+a/2=48,24
3a/2=48,24
3a=48,24×2
3a=96,48
a=96,48/3=32,16
b=32,16/2
=16,08