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Answer:
115
Explanation:
In order to evaluate the expression 10z²+7z+4 when z=3, we can substitute z=3 into the expression.
This gives us:
10(3)²+7(3)+4
Simplify:
= 10(9)+7(3)+4
= 90+21+4
= 115
Therefore, the value of the expression is 115.