Is -7+9=-9+7 true, false, or open? i forgot how to do this. : (

a)true
b)false
c)open

is 4x-3=19 true, false, or open? !

a) true
b) false
c) open

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3

Zack notices that segment nm and segment pq are congruent in the image below: which step could him determine if δnmo ≅δpqr by sas? (5 points) segment mo ≅ segment qr segment on ≅ segment qp ∠ n ≅ ∠ r ∠ o ≅ ∠ q