Hello!
-9y > 9 <=>
<=> -9y ÷ (-9) > 9 ÷ (-9) <=>
<=> y < -1 <=>
<=> y ∈ { -∞; -1 }
Good luck! :)
Answer:
1 yes and they have a scale factor of 1:2
2 yes and they have a scale factor of 1:4
Step-by-step explanation:
The original price of the meal deal if they would have exactly enough money to buy two of the meal deal is $4
<h3>How to write and solve equation?</h3>
let
x = cost of the meal
Both = 2x - 3
- Jessica = 3/4x
- Callista = 1/2x
3/4x + 1/2x = 2x - 3
(3+2)x / 4 = 2x - 3
5/4x = 2x - 3
5/4x - 2x = - 3
(5-8)x/ 4 = -3
-3/4x = -3
x = -3 ÷ -3/4
= -3 × -4/3
= 12/3
x = $4
Learn more about equation:
brainly.com/question/2972832
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Answer:
The 99% confidence interval for the mean difference between the response times measured while intoxicated versus sober is between 0.274 and 1.554 seconds.
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 40 - 1 = 39
99% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 39 degrees of freedom(y-axis) and a confidence level of . So we have T = 2.7079
The margin of error is:
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 0.914 - 0.64 = 0.274 seconds
The upper end of the interval is the sample mean added to M. So it is 0.914 + 0.64 = 1.554 seconds
The 99% confidence interval for the mean difference between the response times measured while intoxicated versus sober is between 0.274 and 1.554 seconds.
Answer:
she will need 735 buttons.
Step-by-step explanation:
11+2+2=15 buttons for each blouse
15x49=735 buttons total