The value of
is
The given diffusion rate equation is:
Now,
Breaking 30 and 12 into its factors
= \sqrt{} \frac{2×3×5}{2×2×3} [/tex]
= \sqrt{} \frac{5}{2} [/tex]
Multiply through row 1 by -1:
Add 3(row 1) to row 3:
Multiply through row 2 by 1/5:
Add -1(row 2) to row 1:
Answer:
(A) 30x+90=300
(B) $7
Step-by-step explanation:
Let x be the roller skating rink's entrance fee for one student.
So, the entrance fee for 30 students=30x
As each student pays a $3 fee to rent skates
So, the fee for rent paid by 30 students= $3x30=$90
The total cost for the students to enter the rink and rent skates= 30x+90
As given that total fee to enter the rink and rent skates is $300.
Therefore, 30x+90=300
(A) The required equation is 30x+90=300.
(B) On solving the equation, we have
Hence, the roller skating rink's entrance fee is $7.