Gerry has 50 sports teams adding cards. of those cards 1/5 of them are baseball cards 1/10 of them are football cards

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

What is the value of x when x + 7 = 21?