Question

Need help please answer ASAP!

Answer 1

Answer:

22.  (3)  x - 3

23.  (4)  $1.67 \times 10^{-21}\: \sf g$

Step-by-step 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

$\textsf{Mass of 1 proton}=1.67 \times 10^{-24}\: \sf g$

$1000=10 \times 10 \times 10=10^3$

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

Answer 2

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