lexieb101
lexieb101
23-08-2016
Mathematics
contestada
5(a + b) + 21 for a=15 and b=27
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4samantha
4samantha
23-08-2016
5(15+b)+21=
75+5b+21=
96+5b=
5b= -95
b= -19 1/5
5(a+27)+21=
5a+135+21=
5a+156=
5a= -156
a= -31 1/5
5(15+27)+21=
75+135+21=
231
Answer Link
Аноним
Аноним
23-08-2016
[tex]5(a + b) + 21[/tex]
[tex]5(a(15) + b) + 21[/tex] [tex]Substitute \ a \ for \ 15 [/tex]
[tex]5(a(15) + b(27)) + 21[/tex]
[tex]Substitute \ b \ for \ 27 [/tex]
[tex]5(15 + 27) + 21[/tex]
[tex] 5*42+21 [/tex]
[tex]210+21 [/tex]
[tex]= 231[/tex]
Answer Link
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