Step-by-step explanation:
1. 3( x - 5 ) + 2x - 3
= 3x - 15 + 2x - 3
= 5x - 18
2. 4a - 3 ( 4 - a )
= 4a - 12 + a
= 5a - 12
3. -2 ( b - 6 ) + 2
= -2b + 12 + 2
= -2b + 14
= 14 - 2b
4. 6 - 3 ( 3 + x )
= 6 - 9 - 3x
= -3 - 3x
Answer: D
Step-by-step explanation: Because there is 3 even numbers and 3 odd numbers so the probability of getting an odd number is 50%
Answer:
The correct option is d
Step-by-step explanation:
From the question we are told that
The concentration of HF is [HF] = 0.6 M
The concentration of NaF is
The Ka of HF is
Generally HF(Hydrogen fluoride ) is ionized as follows
Generally NaF(Sodium fluoride ) is ionized as follows
Generally the from Henderson-Hasselbalch equation the pH of the buffer is mathematically represented as
=>
=>
=>
Answer:
128.86cm squared
Step-by-step explanation:
The area of a circle is
π
r
2
πr
2
pi, r, squared.
π
×
1
cm
×
1
cm
=
1
π
cm
2
π×1cm×1cm=1πcm
2
Finally, subtract the area of the inner circle from the area of the outer rectangle.