If 7a+4 x 5b = 1715 ab =
(a) 0 (b) 2 (c) -1 (d)4

• pls anyone explain the qution
• 12 years agoHelpfull: Yes(4) No(2)
• ans is zero eliminate a nd put in ab form
  a=1/20 nd solu is 0
• 12 years agoHelpfull: Yes(3) No(2)
• put a=-1and b=1 then eqation satisfies then (7^-1+4)*5^1=1715 then a*b=-1*1=-1
• 9 years agoHelpfull: Yes(2) No(0)
• (a3)5/(a2)4=a^15*a^-8=a^7
• 12 years agoHelpfull: Yes(1) No(12)
• ab =1891.4.a=49,b=68.6
• 12 years agoHelpfull: Yes(1) No(2)
• plz explain question.....
• 12 years agoHelpfull: Yes(0) No(1)
• solution c
  
• 8 years agoHelpfull: Yes(0) No(0)
• The answer is -1
• 4 years agoHelpfull: Yes(0) No(0)