Ask question

Ask question

All categories

4 years ago

5

Select the proper placement for parentheses to speed up the addition for the expression 2 + 9 + 8 + 1 A. (1 + 2) + (9 + 8) B. (8

+ 9) + (2 + 1) C. (9 + 2) + (8 + 1) D. (8 + 2) + (9 + 1)

2 answers:

sleet_krkn [62]4 years ago

8 0

It's D because
(8+2) = 10
(9+1) = 10
Hope this helped. (:

irina [24]4 years ago

3 0

The answer is D. Because it is easier to add 9 and 2 and also 8 and 1.

You might be interested in

The mean survivial time after diagnosis for a certain disease is 15 years with a standard deviation of 5 years. Based on a parti

frutty [35]

Answer:

The time the patient expected to survive after diagnosis is 29 years.

Step-by-step explanation:

It is provided that the mean survival time after diagnosis for a certain disease is 15 years with a standard deviation of 5 years.

That is,

$\mu=15\\\sigma=5$

An individual's predicted survival time is <em>a</em> = 2.8 standard deviations beyond the mean.

Compute the time the patient expected to survive after diagnosis as follows:

$X=\mu+a\sigma$

$=15+(2.8\times 5)\\\\=15+14\\\\=29$

Thus, the time the patient expected to survive after diagnosis is 29 years.

5 0

3 years ago

Please help me solve this LCM

hodyreva [135]

Note that

$x^2 - y^2 = (x - y) (x + y)$

and

$x^2 + 2xy + y^2 = (x + y)^2$

Then their LCM is $\boxed{x + y}$ .

7 0

2 years ago

julianna wrote -16+ x = -8 on the board.Do not solve.Tell how you would simplify julianna's expression?

LUCKY_DIMON [66]

Answer:

x = 8

Step-by-step explanation:

→ Add 16 to both sides

x = 8

6 0

2 years ago

If y = 2 x , what happens to y as x becomes larger?

e-lub [12.9K]

Answer:

it doubles?

Step-by-step explanation:

5 0

3 years ago

Which results only in a horizontal compression of y= 1/х by a factor of 6?

marta [7]

Answer:

I'm assuming you mean a compression of factor 6

In that case, it will be h = 1/6x

5 0

3 years ago