-3.2b + 9
by adding like terms together.
I SAY IT THE SECOND OPTION
Answer:
81
Step-by-step explanation:
Order of operations rules require that we do the work inside parentheses first. Multiplication must be done before addition. Thus, the quantity inside parentheses becomes 15 + 4 = 19.
Next, we evaluate 100 - [19], obtaining 81 (answer)
Area of a circle (formula) =

r²
=(3)²

=9

(using 3.14 as

)
=28.26 m²