Question

1. evaluate:

7 × 3² + (83 − 42)

1. 20% of students were absent last friday. if there were a total of 45 students absent, how many students are enrolled at the school?

Explanation:

Step1: Evaluate exponent first

$3^2 = 9$

Step2: Calculate parentheses term

$83 - 42 = 41$

Step3: Perform multiplication

$7 \times 9 = 63$

Step4: Add remaining terms

$63 + 41 = 104$

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Step1: Define variables and equation

Let $x$ = total enrolled students. $0.20x = 45$

Step2: Solve for total students

$x = \frac{45}{0.20} = 225$

Answer:

1. 104
2. 225