anonymous
  • anonymous
hat is the value of the expression when a = 5 and b = 3? 4a^2 5b^3 A. 55 B. 74 C. 81 D. 145
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
@jim_thompson5910 pls help
anonymous
  • anonymous
@jim_thompson5910 pls help
jim_thompson5910
  • jim_thompson5910
Replace 'a' in 4a^2*5b^3 with 5 so we have 4*5^2*5b^3

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jim_thompson5910
  • jim_thompson5910
also replace b with 3 to get 4*5^2*5*3^3 I'll let you finish
anonymous
  • anonymous
okay 100-45=55?
jim_thompson5910
  • jim_thompson5910
oh the original expression is \[\Large 4a^2 - 5b^3\] ??
anonymous
  • anonymous
right
jim_thompson5910
  • jim_thompson5910
I'm not sure how you got 45
jim_thompson5910
  • jim_thompson5910
oh I see. You did 3*3 = 9 when you should have done 3^3 = 3*3*3 = 27
jim_thompson5910
  • jim_thompson5910
try it again
anonymous
  • anonymous
its 55 thanks tho

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