Math
posted by Sammy .
I have three more questions I do not understand.
1. Two points (1,1) and (3,2) are graphed on a coordinate plane.
What is the shortest distance between the points?
A. 3
B. 4
C. 5
D. 7
I have no idea how to do this.
2. Which expression represents the nth term in the sequence 1, 3, 5, 7, 9, n...?
A. n2
B. 2n(squared, exponent 2)1
C. 2n1
D. 2(exponent n)1
I know that n is 11, but I don't get the expressions in the answers.
3. Which statement is correct?
A. All intergers are rational numbers.
B. All irrational numbers are whole numbers.
C. A real number must be a rational number.
D. A repeating decimal is an irrational number
I think it's either A or C.
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