Hello!
2.x^2 - 1 = 2.3^2 - 1 = 2.9 - 1 = 18-1 = 17
Good luck!
Answer:
<h2>x=(y-105)/7</h2>
Step-by-step explanation:
Given that the total time taken to practice is given by the expression as
y=7(15+x)
Simplifying the expression we have
y=105+7x
Solving for x (that is making x subject of formula we have)
7x=y-105
Divide both sides by 7 we have
x=(y-105)/7
Therefore the expression is
x=(y-105)/7
The answer is 31/3 or 10⅓
The answer would be by drawing a graph to help u get the correct answer and once you do that messeage me back the correct answer.