Question

Q8)Simplify: 21b-32 +8b-20b

Q9) Identify the like terms from the following:

a) ab, a²b, 3ab

Q10) Add: 3z, -5z, 4z

Q11) Simplify using laws of exponents : 5³x54

Q12) Subtract 5yz +4 from 7yz+ 6

Q13) If m=2, then find the value of 3m-5

Q14) Find the value of (-6)4 + 32

Q15) Identify the smaller number: 3² or 43

Q16) Express the following in exponential form:

(1) axaxaxaxaxaxa

(2) bxbxb​

Answer 1

Answer:

$8) \: 21b \: - 32 + 8b \: - 20b$

$= > 21b \: - 20b \: + 8b \: - 32$

$= > 9b \: - 32$

$9) \: ab \: and \: 3ab \: are \: the \: like \: terms.$

$10) \: add :$

$3z \: + \: ( - 5z \: ) \: + 4z$

$= > 3z \: + 4z \: - 5z \:$

$= > 7z \: - 5z \: = 2z$

hope it helps you.