Respuesta :

Answer:

100

Step-by-step explanation:

let 's' = score on 6th test

[88(5) + s] ÷ 6 = 90

[tex]\frac{(440+s)}{6}[/tex] = 90

cross-multiply to get:

440 + s = 540

s = 100

it’s 100 but the other person explains it a lot better