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yulyashka [42]
3 years ago
9

Sam was asked to evaluate the expression 5x+3x+20 for X = 100. Sam's work shown below. Sam's work: 5x+3x+20 = 100 8x+20 = 100 8x

= 80 X = 10 What mistakes did Sam make? Help Sam to answer the question correctly.
Mathematics
2 answers:
choli [55]3 years ago
7 0
<span>Sam had to substitute 100 instead of X

</span><span>5x+3x+20 = 
8x + 20 =
8*100 + 20 = 
800 + 20 = 
820   </span>← answer
nevsk [136]3 years ago
3 0

Answer:

The value of given expression for x=100 is 820.

He should substitute the value of x in the given expression instead of equating it to 100.

Step-by-step explanation:

The given expression is

5x+3x+20

Sam want to evaluate the expression 5x+3x+20 for x = 100.

Substitute x=100 in the given expression.

5(100)+3(100)+20

500+300+20

820

The value of given expression for x=100 is 820.

Sam make his mistake in first step. He equate the given expression to 100.

He should substitute the value of x in the given expression instead of equating it to 100.

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