Answer:
(A)
(B)
(D)
Step-by-step explanation:
(A) 60/5 = 4 × 3
(B) 74 = -2t
(D) (r−3) × s=s²
Are equations
Answer
x+3=17
Step-by-step explanation:
Answer:
52
Step-by-step explanation:
Given that :
Mean (m) = 78
Standard deviation (s) = 13
Score that is 2 standard deviations below the mean
Using the relation :
Zscore = (x - m) / s
2 standard deviations below the mean means a Zscore of - 2
Hence,
-2 = (x - 78) / 13
Cross multiply
-2 * 13 = x - 78
-26 = x - 78
x = - 26 + 78
x = 52
Score which is 2 standard deviations below the mean is 52
A term is a number or variable in a math sentence (such as an expression or equation).
Example:
a + 2b + c + 5
5 is a constant; a,b, c are all variables.
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d the answer is 73 degrees
