B.
Elements of the same group in the Periodic Table will have similar chemical and physical properties.
So first, we want to substitute in 15 to all the x variables.
So,
3x - 8y = 5
Becomes
3 * 15 - 8y = 5
Or,
45 - 8y = 5
So here, you can subtract 45 from both sides to move all like terms to one side.
-8y = 5 - 45
And then simplify:
-8y = -40
Then divide both sides by -8
y = 5
16 pages/8 hrs
2 pages/ he
18/2=9
18 pages/9 hrs
9 hours is your answer.
Point A means the smallest value (and = 4)
answer
<span>C. the smallest value</span>
