Whats the problem? just substitute. For example: 3x-5 if x=4 so what you do is this; 3(4)-5=7
Answer:
(3a + 2b)3
Step-by-step explanation:
STEP
1 :
Equation at the end of step 1
(((27•(a3))+((54•(a2))•b))+(36a•(b2)))+23b3
Step 2:
(((27•(a3))+((54•(a2))•b))+(22•32ab2))+23b3
Step 3:
(((27•(a3))+((2•33a2)•b))+(22•32ab2))+23b3
Step 4:
((33a3 + (2•33a2b)) + (22•32ab2)) + 23b3
Step 5:
Factoring: 27a3+54a2b+36ab2+8b3
No you have to move the decimal place over 2 times to the left
30 is the answer. You do 10X 3 which is 30- 2 which is 28 and 28 to the nearest 10th is 30