Ask question

Ask question

All categories

2 years ago

8

How do you simplify 2+-2

="absmiddle" class="latex-formula">/2

1 answer:

ehidna [41]2 years ago

7 0

1+(put the little sign)6

that should be the answer, good luck.

You might be interested in

How many ways can the words in d-r-a-g-o-n-f-l-y be arranged

GarryVolchara [31]

Answer:

362880 ways

Step-by-step explanation:

The word dragonfly has 9 different letters.

So, to find how many ways this word can be arranged, we just need to calculate the factorial of 9:

First letter has 9 possibilities

Second letter has 8 possibilities (one used)

Third letter has 7 possibilities (two used), and so on.

So the number of ways is:

9*8*7*6*5*4*3*2*1 = 362880 ways

7 0

3 years ago

If you roll a number cube 12 times, about how many times would you expect to roll a 5 or 6

Marrrta [24]

You have a 1/3 chance each time you role So 1/3 x 12 = 4 times that you would role a 5 or a 6

6 0

2 years ago

As a follow-up to a report on gas consumption, a consumer group conducted a study of SUV owners to estimate the mean mileage f

kondor19780726 [428]

Answer:

The 95% confidence interval estimate for the mean highway mileage for SUVs is (18.29mpg, 20.91mpg).

Step-by-step explanation:

Our sample size is 96.

The first step to solve this problem is finding our degrees of freedom, that is, the sample size subtracted by 1. So

$df = 96-1 = 95$

Then, we need to subtract one by the confidence level $\alpha$ and divide by 2. So:

$\frac{1-0.95}{2} = \frac{0.05}{2} = 0.025$

Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 95 and 0.025 in the t-distribution table, we have $T = 1.9855$ .

Now, we find the standard deviation of the sample. This is the division of the standard deviation by the square root of the sample size. So

$s = \frac{5.6}{\sqrt{96}} = 0.57$

Now, we multiply T and s

$M = T*s = 1.9855*0.57 = 1.31$

For the lower end of the interval, we subtract the mean by M. So $19.6 - 1.31 = 18.29$

For the upper end of the interval, we add the mean to M. So $19.6 + 1.31 = 20.91$

The 95% confidence interval estimate for the mean highway mileage for SUVs is (18.29mpg, 20.91mpg).

8 0

3 years ago

Solve this system of linear equation the x- and y-value with a comma. 18x+13y=60 6x+2y=6

OLEGan [10]

Answer:

18x + 13y = 60

6x + 2y = 6 ---> 6x = -2y +6 ---> 18x = -6y+18

Substitution

(-6y +18)+13y =60

-18 -18

--------------------------

7y = 42 so y=6

Then, 6x + 2(6) =6, which you will get x = -1

(-1, 6)

8 0

2 years ago

Read 2 more answers

Jane is helping the librarian stack books on some new shelves. She is to stack 116 books on 16 shelves. The librarian told her t

goblinko [34]

Answer:

No

Step-by-step explanation:

This is not possible for Jane to put the same amount it all depends on how the book fits, how thick it is, how skinny it is and what else is on the shelf.

4 0

3 years ago

Read 2 more answers