Zeroes are when f(x)=0
0=x^2+9x+20
factor
0=(x+4)(x+5)
set each to zero
x+4=0
x=-4
x+5=0
x=-5
zeroes are f(-5) and f(-4)
The answer for the equation is going to be N = 2/5 ..
Answer: confidence interval = 27.5 +/- 1.68
= ( 25.82, 29.18)
Step-by-step explanation:
Given;
Number of samples n = 64
Standard deviation r = 6mi/gallon
Mean x = 27.5mi/gallon
Confidence interval of 97.5%
Z' = t(0.0125) = 2.24
Confidence interval = x +/- Z'(r/√n)
= 27.5 +/- 2.24(6/√64)
= 27.5 +/- 1.68
= ( 25.82, 29.18)
Answer: -7
Step-by-step explanation:
−7
=−7
The operation that should be completed first to find the value of the expression is 6 - 3
<h3>How to determine the first expression?</h3>
The equation is given as:
12 + 30 = (6 - 3) +1
By the rule of BODMAS, the first expression that should be evaluated is the expression in the bracket
This means that we solve for 6 - 3, first.
Hence, the operation that should be completed first to find the value of the expression is 6 - 3
Read more about expressions at:
brainly.com/question/723406
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