Question

what is -4+-5 answer please

Answer 1

Answer:

-9

Step-by-step explanation:

• Answer:
• A basic premise of quality control is that the reported laboratory values should correspond to the correct or expected values. To examine this in more analytical terms, let us use speci- mens for which the true (expected) value of an analyte is known.

Answer 2

Answer:

-9is answer ..........