Roberto decided to get rid of all of his baseball cards, so he gave his four friends 32 baseball cards each. how many baseball cards did he have before giving them to his friends?
a. write an algebraic equation that represents the scenario.
b. solve to find the solution.
answer both a. b. with an honest detailed answer . willing to mark as brainliest

This problem is just multiplication problem.

Let be x be number of baseball cards reberto have

The equation represent the scenario is:

X = 4(32)

X = 138

So roberto have 138 baseball cards before giving his 4 friends 32 baseball cards each.

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

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;