Which expression is equivalent to 3xy + 10xy - 5x + 2x - 2yx? a) 15xy + 7x eliminate b) 13xy - 7x - 2yx c) -8xy d) -3x + 11xy

D) -3x + 11xy

Step-by-step explanation:

Given expression=

To find which expression is equivalent to the given expression, we need to first combine like terms, we get

This is equivalent to

Hence D is the right answer, the given expression is equivalent to  .

f(x) = y

f(-3) = -5

step-by-step explanation:

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;