Astudent is attempting to evaluate the literal equation below. which statement best applies to the sample mathematical
work shown?
given: w+ xy + 3x2 = 2 and x = 2 y, find w when y = -2.
step 1: i first substitute y = -2 into x = 2 y, yielding x = 2(-2).
step 2: i simplify the expression, resulting in r = 4.
step 3: i substitute r = 4 and y = -2 into w+ xy + 3x² = 2 a
w+44-2)+3(4)2 = 2
step 4: i use order of operations to simplify and get w- 8+48 =
so w = -38.
a. the student's substitution in step 1 is invalid or incorrect.
b. the simplification performed in step 2 is invalid or incorrect.
c. raising 4 to the second power in step 3 before multiplying it by 3 is an invalid or incorrect.
d. the mathematical work is correct as written

go hook jvc hgv cj xk jvc 6756

because they could drop even lower..

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;

66.666666667%

step-by-step explanation:

divide 150 by 100

divide 100 by 1.5

there you go!

decreased by 33.333333334%