Question

Need help please answer ASAP!

Answer 1

Let's see

• 3x²-9x
• 3x(x-3)

3x is one factor

• Other one is x-3

#2

Mass of 1000 protons

• 1000×Mass of one proton
• 1.67×10^{-24}×10³
• 1.67×10^{-21}g

Answer 2

22. (3) x - 3

23. (4)
`1.67 * 10^(-21)\: \sf g`

Explanation:

Question 22

Given expression:

`3x^2-9x`

Factor out common term
`3x`:

`\implies 3x \cdot x - 3 \cdot 3x`

`\implies 3x(x-3)`

Therefore, the two factors are
`3x` and
`x-3`

Question 23

`\textsf{Mass of 1 proton}=1.67 * 10^(-24)\: \sf g`

`1000=10 * 10 * 10=10^3`

`\begin{aligned}\implies \textsf{Mass of 1000 protons} & = \textsf{mass of 1 proton} * 1000\\& =(1.67 * 10^(-24)) * 1000\\& =1.67 * 10^(-24)* 10^3\\ & =1.67 * 10^(-24+3)\\ & = 1.67 * 10^(-21)\: \sf g\end{aligned}`