Math 2nd quarter reviewer

The following expressions are examples of linear inequalities in two variables EXCEPT:

• A.-x>2y+7

• B.B. 9x+3y ≥ 24

• C. 13x-4y=21

• D.13x-24y<32

Which of the following mathematical expressions is written in standard form?

• A.x<y+5

• B.2x+3y<12

• C.2y+6>3x

• D.2x+5≤x-3y-7

The mathematical statements below are all linear inequalities in two variables EXCEPT:

• A.3y<10-2x

• B.2x-y>6

• C.C. 3x + 5y ≥ 15

• D.23≤3x+2y

Which of the following verbal phrases DOES NOT represent a linear inequality in two variables?

• A. "the total number of male and female students in the learning center is 20"

• B. "the total number of male and female students in the learning center is at most 20"

• C. "the total number of male and female students in the learning center is greater than 20"

• D. "the total number of male and female students in the learning center is less than or equal to 20"

Which of the following is a linear inequality in two variables?

• A.4a-3b>5

• B.7c=4<12-3d

• C.3xy≤16+x

• D.11+2t≥3t-11

Which inequality represents "the sum of x and y is at most 15"

• A.x+y≥15

• B.x+y>15D

• C.x+y≤15

• D.x=y<15

Which of the following is true about the graphical solutions of a linear inequality in two variables?

• A. It is a line.

• B. It is a curve

• C. It is region of points bounded by a curve.

• D. It is a region of points bounded by a line.

The statement "the sum of two numbers is at least 29" can be expressed as:

• A. x+y>29

• B.x+y<29

• C.x+y≥29

• D. x+y≤29

Which of the following statements is true?

• A. Every relation is a function.

• B. Every function is a relation.

• C. Not all functions are relations.

• D. All functions are not relations.

Which of the relations is a function?

• A. ((Mickey, mouse), (Bugs, Bunny), (Cosmo, Wanda))

• B. ((notebook, pen), (paper, pen), (pen, paper), (pen, notebook))

• C. ((January,1), (February, 1), (March, 1), (January,2), (February,2))

• D. ((trashcan, trash), (broom case, broomstick), (broom case, dustpan))