Answer:
Step-by-step explanation:
let score in fourth test=x
88+98+79+x=80×4
265+x=320
x=320-265=55
Answer:
30
Step-by-step explanation:
Answer:
x > 10
Step-by-step explanation:
47-4x<7
Subtract 47 from each side
47-47-4x<7-47
-4x < -40
Divide by -4. When dividing by a negative, flip the inequality.
-4x/-4 > -40/-4
x > 10