Add: -3a 2 b 2 , –52 a 2 b 2 , 4a 2 b 2 , 23 a 2 b 2

Step-by-step explanation:

Sum of -3a 2 b 2 , –52 a 2 b 2 , 4a 2 b 2 , 23 a 2 b 2=

(-3a 2 b 2)+( –52 a 2 b 2)+ (4a 2 b 2)+(23 a 2 b 2)=

-3a 2 b 2 –52 a 2 b 2 +4a 2 b 2 +23 a 2 b 2=.-28a 2 b 2 is the answer

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

something over 10 so ? /10

step-by-step explanation: