Answer:
B
Step-by-step explanation:
Let me know if you need an explanation.
0.4 because if it’s five or more, add one more. If it’s four or less, let it rest.
Answer:
(A) 21
Step-by-step explanation:
5x-15 needs to equal 90 since it is a right angle and 21 makes that true

Answer: you could make a chart using guess and check