3x-1/5-2/9x=124/5how do you solve this?

1 answer:

6 0

So first you would combine the like-terms so you get:
$\frac{7}{9} x - \frac{1}{5} = 124 \div 5$
and combine the second like-terms:
$\frac{7}{9}x - \frac{1}{5} = 24.8$
now you only have a two step equation and you continue by doing the reciprocal and you add the -1/5 to the 24.8 where you get:

7/9x=24.6

then because the 7/9 is being multiplied by the x and your trying to isolate it you divide it by the 7/9 on both sides and you'll end up getting

x=31.628571429....

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Most people complain that they gain weight during the December holidays. To find out how much, we sample the weights of 23 adult

kakasveta [241]

Answer:

The 88% confidence level for the average weight gain if between -1.30 lbs and 4.58 lbs.

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 = 23 - 1 = 22

88% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 22 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.88}{2} = 0.94$ . So we have T = 1.6176