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Example Questions
Example Question #1003 : Algebra
What is the simplified version of the expression:?
Use PEMDAS to dictate which operation comes first. Simplify the parentheses: and
.
Next come exponents:
After that comes multiplication and division left to right:
and
.
Finally, add all the terms together:
Example Question #104 : Expressions
The expression
can be rewritten as:
To simplify this problem, let’s look at each term individually. ;
;
. Thus B is the correct answer.
Example Question #101 : Expressions
The product of two consecutive odd negative integers is . What is the smaller of the two integers?
The problem gives us the product of two consecutive odd negative integers, so we know that one number is less than the other one. Thus, we can set our two numbers as
and
.
At this point, the more algebraically inclined student might recognize that if , then the equation can be remade to say
, and use the quadratic formula to solve.
But this is the ACT, and the faster method by far is to simply recognize that if the product of our two integers is , then
must be evenly divisible by our two integers. The only two choices we have that divide evenly into
are
and
, making
the smaller number and our answer.
Example Question #2 : How To Solve One Step Equations
Suzanne is at the grocery store. She has $5.00 to spend on produce. Oranges are $2.50 per pound, apples cost $1.50 per pound and bananas are $0.50 per pound. Which combination of fruit will fit her budget?
2 pounds of oranges and 1 pound of apples
1 pound of oranges, 1.5 pounds of apples and 1.5 pounds of bananas
3 pounds of apples and 2 pounds of bananas
1 pound of oranges, 1 pound of apples and 2 pounds of bananas
1.5 pounds of oranges and 4 pounds of bananas
1 pound of oranges, 1 pound of apples and 2 pounds of bananas
Make a simple algebra equation and test it against each combination:
Total Cost = $2.50 * (# Oranges) + $1.50 * (# Apples) + $0.50 * (# Bananas)
Example Question #1 : Algebraic Fractions
Change to a mixed number
To convert from a fraction to a mixed number we must find out how many times the denominator goes into the numerator using division and the remainder becomes the new fraction.
Example Question #2 : Algebraic Fractions
What is the average of and
?
To average, we have to add the values and divide by two. To do this we need to find a common denomenator of 6. We then add and divide by 2, yielding 4.5/6. This reduces to 3/4.
Example Question #3 : Algebraic Fractions
Which of the following is equivalent to ?
None of the answers are correct
This problem is solved the same way ½ + 1/3 is solved. For example, ½ + 1/3 = 3/6 + 2/6 = 5/6. Find a common denominator then convert each fraction into an equivalent fraction using that common denominator. The final step is to add the two new fractions and simplify.
Example Question #266 : Gre Quantitative Reasoning
A train travels at a constant rate of meters per second. How many kilometers does it travel in
minutes?
Set up the conversions as fractions and solve:
Example Question #4 : Algebraic Fractions
Simplify.
Can't be simplified
To simplify exponents which are being divided, subtract the exponents on the bottom from exponents on the top. Remember that only exponents with the same bases can be simplified
Example Question #5 : Algebraic Fractions
Simplify:
x2 – y2 can be also expressed as (x + y)(x – y).
Therefore, the fraction now can be re-written as (x + y)(x – y)/(x + y).
This simplifies to (x – y).
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