Answer:
i want to say it is b but i could be wrong
Step-by-step explanation:
There are two changes of sign, so there are 2 or 0 possible positive roots.
There are two changes of sign, so there are 2 or 0 possible negative roots.
There are 4,2 or 0 possible non-real roots.
Explanation:
We are told SP is parallel to RQ. So we would apply similar triangles theorem
Ratio of the corresponding sides of the triangles are equal
Ratio of the corresponding sides of small to big triangle
NS/NR = NP/NQ
NS=12, SR=78, and NP=2
NR = NS + SR
NR = 12 + 78
NR = 90
12/90 = 2/NQ
The probability of pressing a white key is 13/22. This solution can be obtained by dividing 52 by 88 which is the total number of keys on the modern piano.