Here is a link to the playlist of video explanations to all of the math questions in the 2019 April ACT (Form B04) Test. The math section in the 2019 April ACT test was harder than usual, and this is clear from the scoring scale, which shows that one can miss 6 questions and still score a 34 on the mathematics. In the past, typically missing 4 questions would lead to a score of 34 on the ACT’s math section. With the increasing popularity of ACT, more of the traditional SAT takers have shifted to ACT, and as a result it has become more competitive at the upper end of scaled scores.

## Reflection of a straight line: ACT Math Practice Question

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Try this ACT math practice question on what happens to the y-intercept of a line when it is reflected.

In the standard $xy-$coordinate plane, the line $3x – y = 6$ is reflected across the $x-$axis. What is the $y-$intercept of the resulting line?

- $\quad -6$
- $\quad -2$
- $\quad 2$
- $\quad 3$
- $\quad 6$

## 2018 December ACT Form B05: Video Explanations

I have posted video explanations to all of the math questions in the 2018 December ACT (Form AB05) Test.

## Area of a scalene triangle: ACT Math Practice Question

##### Try this ACT math practice question on finding the area of a triangle.

In the figure above, the length of side $AB$ of triangle $ABC$ is $3$, and $\angle A = \angle C= 30^{\circ}$. What is the area of the triangle $ABC$?

- $\quad \dfrac{9\sqrt{3}}{8}$
- $\quad \dfrac{9}{4}$
- $\quad \dfrac{9\sqrt{3}}{4}$
- $\quad \dfrac{9}{2}$
- $\quad \dfrac{27\sqrt{3}}{8}$

## Interpreting parabolas: ACT Math Practice Question

##### Try this ACT math practice question on interpreting terms in a parabolic relationship.

An object thrown directly upward is at a height of $h$ feet after $t$ seconds, where $h = -16t^2 + 12t + 24$. The number $24$ in this equation represents which of the following?

- $\quad$ The highest distance the ball is from the ground.
- $\quad$ The distance the ball is from the ground when it is thrown upward.
- $\quad$ The number of seconds the ball will take to reach the highest point.
- $\quad$ The number of seconds the ball will take to reach the ground.
- $\quad$ The velocity of the ball when it is thrown.

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