Fill your inequality in with the y and x provided and then do the math. (4, -1) would fill in like this (I will use brackets to indicate absolute value symbols, since there are none in the equation editor):
The right side is in fact equal to the left side so that's not the answer. For (-1, -4):
and these are also equal. Let's try C now (-4, 1):
. The absolute vale of -4 is 4 so 4 - 5 = -1 which is, in fact, less than 1. So C is our answer.
Cotangent is one over tangent
1/(4/7)
Answer 7/4
Given that 3/5 know fortran
1/6 know cobol
1/10 know both fotran and cobol
the fraction of programmers who knows at least one of the two programs will be:
3/5+1/6+1/10
=13/15
the fraction of programmers who don't know either of the two will be:
1-13/15
=2/15
thus the answer is 2/15
If an angle is a right angle, its measure is 90.
If an angle measure is 90, the angle is a right angle.
The answer is:
Both statements are true.
This is the biconditional.
An angle is a right angle if and only if its measure is 90°.
Other types of angles:
Acute angle - less than 90°
Obtuse angle - more than 90° but less than 180°.
Straight angle - exactly 180°
Reflex angle - more than 180°