Question

Justin is evaluating the expression 12.5 + 3.8x, when x is 7.9.

12.5+3.8(7.9)
16.3(7.9)
128.77
What was Justin's error?
A. Justin should have multiplied 12.5 and 7.9 first.
B. Justin should have added 12.5 and 7.9 first.
C. Justin should have multiplied 3.8 and 7.9 first.
D. Justin should have added 3.8 and 7.9 first.

Answer 1

the answer is option C….. for those who can’t see the answer above me^^^

Answer 2

Option:-

• 
  `\sf{c ) Justin \: should \: have \: multiplied \: \red{3.8 }\: and \: \red{7.9 }\: first.}`

Given:-

• 
  `\frak{12.5+3.8x}`

`\:`

• 
  `\frak{x = 7.9}`

`\:`

Solution:-

• 
  `\frak{12.5+3.8x}`

`\:`

• 
  `\frak{12.5 + 3.8( 7 \: . \: 9 )}`

`\:`

• 
  `\frak{12.5 + 30.02}`

`\:`

• 
  `\boxed{\frak{ \blue{42 \: . \: 52}}}`

`\:`

hope it helps! :)