I just published the playlist of video explanations to all of the math questions in the Decemeber 2014 ACT 72G test.
Online Resource for ACT Math
I just published the playlist of video explanations to all of the math questions in the Decemeber 2014 ACT 72G test.
Here is a practice question on simplifying trigonometric expressions.
For all $\theta$, $\quad \sin \theta + {(\cot \theta})(\cos{\theta})$ is equivalent to
Here is a practice question on straight lines in the coordinate plane.
If the point $(a, -2)$ falls on the straight line $2y-3x=-6$ in the standard $(x, y)$ coordinate plane, then $a=$ ?
Here is a practice question on how the volume of a cylinder varies with its height and radius.
The radius of a right circular cylinder is doubled and the height of the cylinder is halved to form a new right circular cylinder. The volume of the new
cylinder is how many times the volume of the original cylinder?
Here is a practice question on how the equation of a circle in the coordinate plane is related to the coordinates of its center and radius.
In the standard $(x, y)$ plane, a circle has a center at $(2, -3)$ and a circumference of $8\pi$. Which of the following is an equation for this circle?