Answer:
A,
Step-by-step explanation:
I wrote answers in picture and I use Desmos app to solve this equations
Let the faculties be X and the number of students be Y.
X/Y = 17/3
3X= 17Y
X=17Y/3
Let that be equation 1
We also know that X+Y = 740. Let it be equation 2
Substitute equation 1 in equation 2
(17Y/3)+Y= 740
20Y/3 = 740
Y=111
Since the total is 740, then X equal 740-111 =629.
The number of faculties is 111 and the number of students is 629.
We have to divide 9/10 by 3/12.
if we divide by a fraction, we can instead multiply by it's inverse:
so now we count:
so we can cut exactly 3 pieces!
No actually you can just multiply both sides of the equation by 2 and get y-4=20. then add 4 to both sides to get y=24.