5. Maura writes an expression equivalent to 8a - (-3 – 5a) – 2a.
Her work is shown below.
8a - (-3 - 5a) - 2a
Step 1: 8a+ 3 - 5a – 2a
Step 2: (8a – 5a – 2a) + 3
Step 3: (3a - 2a) + 3
Step 4: a +3
In what step does Maura make a mistake? Describe her error and find the correct
equivalent expression.
Your answer

0.6, 3/5, and 6% are the 3 same portion.

but, when they're all changed to a decimal they would equal to 0.6.

hope this , good luck!

sites:

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;

explanation:

step-by-step explanation: