Answer:
23, 5, 3
Step-by-step explanation:
Using order of operations
Multiplication is performed before addition / subtraction
(a)
5 + 2 × 3²
= 5 + 2 × 9
= 5 + 18
= 23
(b)
[tex]\frac{7+8}{5-2}[/tex]
= [tex]\frac{15}{3}[/tex]
= 5
(c)
[tex]\frac{18-3(3)}{5-1^2}[/tex]
= [tex]\frac{18-6}{5-1}[/tex]
= [tex]\frac{12}{4}[/tex]
= 3
