All ACT Math Resources
Example Questions
Example Question #1 : Matrix Combinations
Simplify.
Possible Answers:
Correct answer:
Explanation:
When we are asked to simplify a matrix that is being multiplied by a constant we simply multiply each component of the matrix with the scalar factor that is on the outside of the matrix.
Therefore,
Example Question #3 : How To Find Combinations With A Matrix
At a sale, a necklace that was originally is marked ten percent off. Cara has a coupon that will allow her to get ten percent off the discounted price. How much will Cara pay for the necklace if she uses the coupon?
Possible Answers:
Correct answer:
Explanation:
Taking ten percent off of gives us ,
.
Taking ten percent off of this amount gives us
.
NOTE: This problem cannot be solved by taking twenty percent off of .
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