Linear equations

A mathematical sentence that can be verified either true or false but not both, is called ____

• a mathematical sentence

• a mathematical statement

• an open sentence

• an equation

A true mathematical statement containing the sign "=" is called ____

• An equation

• an inequation

• an open sentence

• An equality

which of the following is not an open sentence?

• x + 2 = 6

• x - 7 < 10

• 2 + 3 = 5

• y + z > p

Linear equation in one variable is an equation with only one variable and having

• Degree 2

• Degree 1

• Degree 3

• no degree

If a/b = c/d, then ad = bc, then this process is called ____

• cross multiplication

• division

• elimination

• replacement

If (0.8)x + 1.25 = 2x + 0.05, then x = ____

• 1

• 2

• 3

• 0

Three consecutive numbers whose sum 81 is ________

• 26, 27, 28

• 25, 26, 27

• 27, 28, 29

• 28, 29, 30

The number of variables in a simple equation is _____

• 3

• 2

• infinite

• 1

" 4 more than half of x" in symbolic form is ______

• x/2 -4

• x/2 + 4

• 4 - x/2

The value of 'x' which changes x(x+1) = 42 into a correct statement is ____

• 6

• 7

• 5

• 4