Answer:
23.8
Step-by-step explanation:
To evaluate an expression like this one, put the given numbers in place of the corresponding variables and do the arithmetic.
2l +2w
For l=5.7 and w=6.2 ...
2(5.7) +2(6.2)
= 11.4 +12.4
= 23.8
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Additional comments
You can save a multiplication step if you factor out the 2 first:
= 2(l +w)
= 2(5.7 +6.2)
= 2(11.9)
= 23.8
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In many modern calculators, you can input the values of the variables and the calculator will use those to evaluate the expression for you.
