So basically you know that 25 x 17 is 425. So all you would do is estimate! It's super simple. Just do 25 x 17, then put your estimate in the estimate box. 5 or higher it goes up, 4 or lower it goes down, so for your estimate I would probably put 430. Hope this helps! :)
Answer:
7a-28
Step-by-step explanation:
To expand this simply multiply both pieces of the inside by 7.
7a - 28
When multiplying the same base with exponents, you keep the base the same and then you add the exponents, so for this question you do:
10^3 x 10^6
10^9
-79, -55, 18, 44, 101, 143
