Respuesta :

Answer:

4. A

8. D

9. B

Step-by-step explanation:

4. started with 10 points: +10

lost 20 points: -20

won 45 points: +45

10-20+45

8. 11-(-8)

=19

9. 100-(-50)-2

=150-2

=148

PLS GIVE BRAINLIEST

Answer:

4 is A ; 8 is D ; 9 is B

Step-by-step explanation:

PLS GIMME BRAINLIEST

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