The square root of 169=13 so it is rational
Answer:
40 rubber bands are needed
5 rubber bands will be left from 5 bags of of rubber band
Step-by-step explanation:
Each student will need five rubber bands.
There are eight students
Total rubber bands needed = rubber bands per student × number of students
= 5 × 8
= 40
Total rubber bands needed = 40
Rubber bands come in bags of nine.
Number of bags needed = Total rubber bands needed / number of rubber bands in each bag
= 40 / 9
= 4.44 bags
It is impossible to get decimal number of rubber bands bag, so, the next whole number after 4 is 5
5 rubber bands bags will be bought which = 5 × 9
= 45 rubber bands
Only 40 rubber bands are needed
Left over rubber bands = 45 - 40
= 5 rubber bands
Answer:
![\boxed{\bold{2a^2+9ab-7b^2}}](https://tex.z-dn.net/?f=%5Cboxed%7B%5Cbold%7B2a%5E2%2B9ab-7b%5E2%7D%7D)
Step By Step Explanation:
Remove Parenthesis: (a) = a
![\bold{5a^2+4ab-3b^2-\left(-5ab+4b^2+3a^2\right)}](https://tex.z-dn.net/?f=%5Cbold%7B5a%5E2%2B4ab-3b%5E2-%5Cleft%28-5ab%2B4b%5E2%2B3a%5E2%5Cright%29%7D)
Simplify ![\bold{-\left(-5ab+4b^2+3a^2\right)}](https://tex.z-dn.net/?f=%5Cbold%7B-%5Cleft%28-5ab%2B4b%5E2%2B3a%5E2%5Cright%29%7D)
![\bold{5ab-4b^2-3a^2}](https://tex.z-dn.net/?f=%5Cbold%7B5ab-4b%5E2-3a%5E2%7D)
Rewrite Equation:
![\bold{5a^2+4ab-3b^2+5ab-4b^2-3a^2}](https://tex.z-dn.net/?f=%5Cbold%7B5a%5E2%2B4ab-3b%5E2%2B5ab-4b%5E2-3a%5E2%7D)
Simplify ![\bold{5a^2+4ab-3b^2+5ab-4b^2-3a^2}](https://tex.z-dn.net/?f=%5Cbold%7B5a%5E2%2B4ab-3b%5E2%2B5ab-4b%5E2-3a%5E2%7D)
![\bold{2a^2+9ab-7b^2}](https://tex.z-dn.net/?f=%5Cbold%7B2a%5E2%2B9ab-7b%5E2%7D)
- Mordancy