pamhr10
pamhr10 pamhr10
  • 24-06-2020
  • Mathematics
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what is the sum of a and b?

what is the sum of a and b class=
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CSMedrano
CSMedrano CSMedrano
  • 24-06-2020

Answer:

a=13, b=7

Step-by-step explanation:

You can use the exponent rule

[tex]3x^{a-5}y^{9-b}=3x^{8}y^{2}[/tex]

so [tex]x^{a-5}=x^{8}[/tex] so

a-5=8

a=13

[tex]y^{9-b} =y^{2}[/tex] so

9-b=2

b=7

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