SAT prep Flashcard

Front

What is a matrix?

Back

A rectangular array of objects, usually numbers.

Front

What is the entry at r31 in a matrix if it is given as 7?

Back

7

Front

How many columns are in a 5 x 4 matrix?

Back

4

Front

Simplify: (6 - 3i) + (1 + 8i)

Back

7 + 5i

Tags

CCSS.HSN.CN.A.2

Front

What is the result of performing the operation if the answer is A?

Back

A

Tags

CCSS.7.EE.A.1

Front

What is the definition of a complex number?

Back

A number that can be expressed in the form a + bi, where a and b are real numbers and i is the imaginary unit.

Tags

CCSS.HSN.CN.A.1

Front

What is the imaginary unit 'i'?

Back

The imaginary unit 'i' is defined as the square root of -1.

Tags

CCSS.HSN.CN.A.1

Front

What is the sum of two complex numbers (3 + 4i) and (2 - 3i)?

Back

5 + i

Tags

CCSS.HSN.CN.A.2

Front

What is the product of two complex numbers (1 + 2i) and (3 + 4i)?

Back

(1*3 - 2*4) + (1*4 + 2*3)i = -5 + 10i

Tags

CCSS.HSN.CN.A.2

Front

What is the determinant of a 2x2 matrix [[a, b], [c, d]]?

Back

ad - bc