Respuesta :
Answer:
45
Step-by-step explanation:
To solve first, plug in 21 for x in the rule, y=2x+3. This makes the rule y=2(21)+3. Then simplify to find y.
Multiply 2 and 21, y=42+3. Next, add, y=45.
[tex]\huge\text{Hey there!}[/tex]
[tex]\large\text{If x = 21}[/tex]
[tex]\large\text{y = 2(21) + 3}\\\large\text{2(21) = 42}\\\large\text{y = 21 + 3}\\\large\text{45 = 42 + 3}\\\large\text{= \bf{\underline{y = 45}}}\\\\\boxed{\boxed{\large\text{Answer: \bf{y = 45}}}}\huge\checkmark[/tex]
[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]