Answer:
Step-by-step explanation:
<u>Mean of four numbers a, b, c, and d is 8:</u>
- (a + b + c + d)/4 = 8
- ⇒ a + b + c + d = 32
<u>Mean of seven numbers x, y, z, a, b, c and d is 12:</u>
- (x + y + z + a + b + c + d)/7 = 12
<u>Substitute the sum of 4 numbers:</u>
- x + y + z + 32 = 7*12
- x + y + z = 84 - 32
- x + y + z = 52
<u>Mean of x, y and z is:</u>
Answer:
$1.25.
Step-by-step explanation:
The answer would be C) As the number of hours of studying increases, test scores increase because the scatterplot has a cluster that increases from left to right.
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Hope this helps. :)
Answer:
A = 74295.
Step-by-step explanation:
74*9*
- the last number must be a 0 or a 5.
So we try 74090/45 - not an integer
74095/45 = No
74190/45 No
74195/45 No
74295 / 45 = 1651 So that's it,
