Which step should richard perform last? Will choose brainliest. Any absurd answers will be reported.

A

Step-by-step explanation:

Our equation is: 9² + 2[(5 + 2)² - 4]. We need to use PEMDAS: parentheses, exponents, multiplication, division, addition, and subtraction.

The first thing to do is to add the 5 and 2 in the parentheses:

9² + 2[(5 + 2)² - 4]

9² + 2[(7)² - 4]

Then square the 7:

9² + 2[(7)² - 4]

9² + 2[49 - 4]

Do the subtraction operation within the parentheses/brackets:

9² + 2[49 - 4]

9² + 2[45]

Square 9:

9² + 2[45]

81 + 2[45]

Multiply 2 by 45:

81 + 2[45]

81 + 90

Thus, the answer is A.

A

Step-by-step explanation:

9² + 2[(5+2)² - 4]

81 + 2[(7)² - 4]

81 + 2[49 - 4]

81 + 2(45)

81 + 90

bru

step-by-step explanation:

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: