Respuesta :

apologiabiology
easy
remember: exponents first

y=5(4³)-2(4²)+4-45
y=5(64)-2(16)-41
y=320-32-41
y=288-41
y=247

answer is 247

Answer:

y = 247

Step-by-step explanation:

The given cubic model that expresses the value of y is

y = 5a³ - 2a² + a - 45

We have to find the value of y at a = 4

We can calculate the value of y by putting a = 4

y = 5(4)³ - 2(4)² + 4 - 45

 = 5(64) - 2(16) - 41

 = 320 - 32 - 41

 = 247

y = 247