7 - (3 + 5) + (- 3 + 6) / 3 x 5

4

Step-by-step explanation:

Always remember the order of operations: PEMDAS.

7 - (3 + 5) + (-3 + 6)/3 x 5

7 - (8) + (3)/3 x 5 (solve the parantheses first)

7 - 8 + 1 x 5 (3/3 comes first since multiplication and division have the same order; you would go left to right)

7 - 8 + 5 (Multiplication has a higher order than addition and subtraction)

4

4

Step-by-step explanation:

Use PEMDAS

7 - (3+5) + (-3 + 6) / 3*5 (solve Parenthesis first)

7 - 8 + 3 / 3 * 5 (solve the division next)

7 - 8 + 1 * 5 (solve the multiplication next)

7 - 8 + 5 (subtract next)

-1 + 5 (lastly add)

4

Hope this helps

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;