Jared bought 7 cans of paint. A can of
red paint costs $3.75. A can of black
paint costs $2.75. Jared spent $22.25 in
all. How many cans of black (b) and how
many cans of red (r) did hé buy?
r+b=7
3.75r+2.75b=22.25

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4

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;

6 cm

step-by-step explanation: