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Answer 1 · 2018-02-17T15:45:27

48

#6c# means #6*7#

#therefore 4 + (6*7) = 4+42=46#

Answer 2 · 2018-02-17T16:04:24

#46#

#"substitute the given values into the expression"#

#color(red)(4)+(6xxcolor(blue)(7))=4+42=46#

Answer 3 · 2018-02-17T16:16:45

#46#

Plugging into the equation #d=4, c=7#, we get

#d+6c#

#=4+(6*7)#

#=4+42#

#=46#