Answer:
They each paid $40
Step-by-step explanation:
please give brainliest
So to do this you have to first calculate the sum subtract, multiply both sides by 10, move the terms, and collect like terms. So X=3460 I believe
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Answer:
A sample of 1032 is needed.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
The margin of error is:

A sample of 300 components showed that 20 were defective.
This means that 
99% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
How large a sample is needed to estimate the true proportion of defective components to within 2.5 percentage points with 99% confidence?
A sample of n is needed.
n is found when M = 0.025. So






Rounding up
A sample of 1032 is needed.
Answer:
$ 37.5
Step-by-step explanation:
It is given :
Price of the dress in the market = $ 50
The shopkeeper a discount percentage = 25%
Therefore the discount amount is = 25 % of 250

= 12.5
Therefore the sale price of the dress is = 50 - 12.5
= 37.5
Therefore the sale price is $ 37.5
Answer: y=2x+5
Slope is 2
Step-by-step explanation: y=2(x+1)+3
y=2x+2+3
y=2x+5