All ACT Math Resources
Example Questions
Example Question #121 : How To Find The Solution To An Equation
Translate into an algebraic expression:
Two fifths of the difference of five times a number and two equals six times the number.
In order to translate the description into an algebraic expression, you must first form the difference , multiply it by
, and then set the equation equal to
, as follows:
Example Question #121 : How To Find The Solution To An Equation
A car averages miles per gallon. If gas costs
per gallon, which of the following is closest to how much the gas would cost for this car to travel
typical miles?
To solve this problem you should divide the total number of miles by the miles per gallon
, and then multiply by the cost of gas per gallon
. This gives you
, which is closest to
.
Example Question #121 : Equations / Inequalities
When , by how much does the value of
exceed the value of
?
You must plug in for
and
for
, this means
and
Example Question #122 : How To Find The Solution To An Equation
What is the value of when
?
The first step is to subtract from both sides so you're left with
. Next, you add
to both sides, giving you
. The final step is to divide by
, giving you
.
Example Question #121 : Linear / Rational / Variable Equations
Karen has more than
times as many dollars as Susan. Karen also has
as many dollars as John would if he had
more dollars. How many dollars does Susan have, relative to John?
First, set up our two equations. If Karen has seven dollars more than three times as many dollars as Susan, then . If Karen has half as many dollars as John would if he had two more dollars, then
. The Substitution Property of Equality thus says that
. Now, we simply solve for
in terms of
.
Example Question #401 : Algebra
If the third day of the year is a Wednesday, what is the 165th day?
Thursday
Wednesday
Tuesday
Monday
Friday
Thursday
If the third day is a Wednesday, then the first day is a Monday. 23 weeks will complete a cycle with the 161st day. Therefore, the fourth day past that, 165, is a Thursday.
All ACT Math Resources
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