If the mean is 67, the total of all the data values has to be 67*4, or 268. 268-56-63-70 = 79, which means the fourth data value has to be 79.
Answer:
C
Step-by-step explanation:
It is right
Answer: 60
Step-by-step explanation: Okay, so 4 is approx 22.3 percent of 18, so 22.3 percent of 270 is approx 60. That's how I worked it out, please do tell if I am wrong.
Answer:
x=30
Step-by-step explanation:
180=40+(4x+20) 180-40
140=4x+20 140-20
120=4x 120/4
30=x
The measure of DE = 90 degrees because its corresponding central angle = 90 degrees.