If a sample size is less than the sample size must come from a population having a normal distribution in order to follow normal distribution calculations.

If a sample size is less than ___30, the sample size must come from a population having a normal distribution in order to follow normal distribution calculations.

Step-by-step explanation:

By Central Limit Theorem we know that if we have a population with mean μ and standard deviation σ, also for sufficiently large sample size, sample distribution is approximately Normally distributed i.e. the population is normal then this theorem is true even for sample size less than 30.

45

step-by-step explanation:

5x + 5

step-by-step explanation:

you should always add the diagrams and graphs we cannot see. this particular question is kind of borderline because we can make a graph for you.

(f + g)x = -x^2 +3x + 5 + x^2 + 2x

(f + g)x = 5x + 5

the graph of z = 5x + 5 is shown below. always use desmos when in doubt.