X is the unknown value of the variable x. X = 4 means that that value is given to you and the value of x is 4. You are supposed to substitute x in for 4 in that equation.
Step-by-step explanation:
x-intercept= -4
yintercept= -7
Answer:
![4^{-8} \\4^{-2}\\4^{8}\\4^2](https://tex.z-dn.net/?f=4%5E%7B-8%7D%20%5C%5C4%5E%7B-2%7D%5C%5C4%5E%7B8%7D%5C%5C4%5E2)
Step-by-step explanation:
For the first few exponents multiply and the rest they add because like terms.
The trick is that when you raise a power to a power you multiply. Otherwise you add if the base value is the same.
Answer:
The following statements are correct
The cost of 100 cans of tennis balls is $250
The cost of 120 cans of tennis balls is $300.
The cost of 250 cans of tennis balls is $625
Step-by-step explanation:
30/12 = 2.5 per can
100*2.5 = 250
120*2.5 = 300
250*2.5= 625
Answer:
Answer = a. Explanatory variable: history of sleep apnea; and outcome: Alzheimer’s status.
Step-by-step explanation:
This is Case-Control analytical study where the cases are the 50 participants with Alzheimer’s and the control are the 50 participants without Alzheimer’s. This type of study requires the formulation of certain hypothesis in an attempt to investigate the possible factor (sleep apnea) of a particular health condition (Alzheimer’s disease). The outcome of the studies will explain the roles of specific factors in the incidence and prevalence of a disease. This type of study investigates the hypothesis that there is a relationship between suspected causal factor (sleep apnea: which is referred to as the explanatory variable) and a disease (Alzheimer’s disease: which is referred to as the outcome variable). The study group is selected on the basis of presence or absence of the ‘outcome variable’ which is the disease where the factors (explanatory variable) are already present or not in the case (50 participants with Alzheimer’s) and its controls (50 participants without Alzheimer’s)