Math Formulas to Ace the ACT
The SAT provides a list of formulas you will need to complete its math section. The makers of the ACT are not so generous. You will need to have a host of formulas committed to memory for the ACT's math section. Here are a few to get you started.
For any right triangle, the length of the hypotenuse (c
) squared is equal to the sum of the squares of the two shorter sides (a
You should understand logarithms and how to rewrite them.
to what power (y
) will result in x
. You can rewrite it as:
is a product of two different numbers, it may be easier to solve if you remember the following formula:
Solve any quadratic equation in the form ax^2+bx+c=0 with this formula. For those formulas that are difficult to find the difference of squares, or if you are in a rush on an exam, the quadratic formula will be very nice to know.
In this formula, m
is the slope and b
is the y-intercept. If you get an equation that is not in this format, you will want to re-write it so that it is. It makes graphing a line much easier.
To find x
percent of a number (n
To find what percent a number (n
) is of another number (m
And finally, n
percentage of what number?
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