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My name is Ann [436]
3 years ago
6

The simplest form of (a −2 / b −1 +b −2 / a −1 )-1

Mathematics
1 answer:
ss7ja [257]3 years ago
8 0

put ur ASSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS IN UR FATHER

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AYUDAAAA, LES DOY CINCO ESTRELLAS SI LO RESUELVEN BIEN
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2 years ago
Could anyone help with this, thanks !!
pogonyaev

Answer:

Step-by-step explanation:

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3 years ago
If c = the number of cars in a parking lot, which algebraic expression
telo118 [61]

Answer:

c+9

Step-by-step explanation:

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3 years ago
A savings and loan association needs information concerning the checking account balances of its local customers. A random sampl
Marina86 [1]

Answer:

The 99% confidence interval for the true mean checking account balance for local customers is ($439.29, $888.99).

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 = 14 - 1 = 13

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 13 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 3.0123

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 3.0123\frac{279.29}{\sqrt{14}} = 224.85

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 664.14 - 224.85 = $439.29

The upper end of the interval is the sample mean added to M. So it is 664.14 + 224.85 = $888.99.

The 99% confidence interval for the true mean checking account balance for local customers is ($439.29, $888.99).

4 0
3 years ago
What is the standard form for the graph?
Novosadov [1.4K]
Y=-2x+0 reason: rise over run as you can see in the graph -2 rise (drop) and -1 run and b=0 y intercept
3 0
3 years ago
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