Step-by-step explanation:
x²+3x+4=0
x²+3x_ +2=0
x²+3x_2=-2
x²+3x_2+(3x_4)²=-2+(3/4)²
(x+3/4) =-2+9_16
x+3_4 = -32+9__16 =√-23_6
x+3_4 =-√23_4
x = -3+√-23___4
x = -3- √-23___4 , -3+√-23___4 //
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Answer:
x<−31
Step-by-step explanation:
Using the Central Limit Theorem, it is found that:
- The standard deviation is .
<h3>Central Limit Theorem</h3>
- It states that for a <u>proportion p in a sample of size n</u>, the sampling distribution of sample proportions has mean and standard deviation
- When two variables are subtracted, the mean is the subtraction of the means, while the standard deviation is the square root of the sum of the variances.
In 2006, 95% of new cars in the US came with a spare tire, with a sample of 250, hence:
In 2017, 72% of new cars in the US came with a spare tire, with a sample of 250, hence:
Hence, for the distribution of differences:
To learn more about the Central Limit Theorem, you can take a look at brainly.com/question/16695444
Answer:
$4.64
Step-by-step explanation:
1 cup = 16 tablespoons
cup = 8 tablespoons
Each lemon yields about 2 tablespoons of juice. You need 8 tablespoons for one lemon pie, so you need lemons for one pie and lemons for two pies.
The store is selling lemons at $0.58 each, hence, 8 lemons will cost