3 years ago

Can someone please check this I'm not sure if it's y=126 or is the 126 negative

1 answer:

6 0

So to solve for y, subtract 108 from each side.
The equation becomes -y=126

Since you don't want y to be negative then divide each side by -1 this will flip all of the signs (positives become negative and vice versa) without changing the number.

So the equation is now y= -126

You might be interested in

You discovered 1000 grams of an unknown element called Coolium 23 that has a half life 23 days. How long will it take for you to

Trava [24]

Answer:

13.8 days

Step-by-step explanation:

In this case we can solve it by means of a rule of three, knowing the amount of life for 1000 grams, it must be proportional for 600 grams, like this:

grams days

1000 23

600 x

x = 600 * 23/1000

x = 13.8

which means that for the 600 grams it would be an average life of 13.8 days.

4 0

3 years ago

. A study of one thousand teens found that the number of hours they spend on social networking sites each week is normally distr

Gnesinka [82]

We are given the following data:

Sample Size = n = 1000

Sample Mean = u = 15 hours

Population Standard Deviation = s = 2 hours

Since we know the population standard deviation, we can use z distribution to find the confidence interval about the mean. z value for 95% confidence interval is 1.96.

Formula for the confidence interval is:

$(u-z\frac{s}{\sqrt{n}} , u+z\frac{s}{\sqrt{n}})$