[I think you wrote the question wrong] -5 multiplied by -4 equals 20 and -5 and -4 equals -9
200+400=600 u just add 2 and 6 togather and u get 6 and then annd the two zeros on too it
Answer:

Step-by-step explanation:
Four sets of three Squared
To start, you will need to get the set(base number) and get the exponent 3 and put it on the top.

Hope this helps!
45% right if .5 x 90 = 45 and as a percentage it would be 45%