Question attached
Answer:
130
Step-by-step explanation:
Number of students old donors can be calculated from the Pareto chart by adding number of blood donors on the different bars:
Type 0= 50
Type A= 35
Type B =30
Type AB =15
Therefore 50+35+30+15=130 blood donors
hello
u sayh-e-l-l-o yW
45
multiply it
x²-3x+3x-9=0
x²-9=0
x²=9
square root both side we get
x=3
