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4 years ago

How do i do this:6 ( 5 ) -4

Mathematics

2 answers:

Anna007 [38]4 years ago

7 0

Hi friend,

Samhitha from brainly.com here to help.

→ 6(5)-4

→ 30-4

→ 26

hope it helps

Thank you

vova2212 [387]4 years ago

4 0

6*5 to equal 30 then subtract 4 to get 26

You might be interested in

he blood platelet counts of a group of women have a bell-shaped distribution with a mean of 247.3 and a standard deviation of 6

Ulleksa [173]

Answer:

The approximate percentage of women with platelet counts within 3 standard deviations of the mean is 99.7%.

Step-by-step explanation:

We are given that the blood platelet counts of a group of women have a bell-shaped distribution with a mean of 247.3 and a standard deviation of 60.7.

Let X = the blood platelet counts of a group of women

The z-score probability distribution for the normal distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

where, $\mu$ = population mean = 247.3

$\sigma$ = standard deviation = 60.7

Now, according to the empirical rule;

68% of the data values lie within one standard deviation of the mean.

95% of the data values lie within two standard deviations of the mean.

99.7% of the data values lie within three standard deviations of the mean.

Since it is stated that we have to calculate the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 65.2 and 429.4, i.e;

z-score for 65.2 = $\frac{X-\mu}{\sigma}$

= $\frac{65.2-247.3}{60.7}$ = -3

z-score for 429.4 = $\frac{X-\mu}{\sigma}$

= $\frac{429.4-247.3}{60.7}$ = 3

So, it means that the approximate percentage of women with platelet counts within 3 standard deviations of the mean is 99.7%.

4 0

3 years ago

Need help asap!! please

notka56 [123]

Answer:

A. x ≤ $-\frac{19}{13}$

Step-by-step explanation:

-9x + 2 > 18 or 13x + 15 ≤ -4

-9x > 16 or 13x ≤ -19

x > $-\frac{16}{9}$ or x ≤ $-\frac{19}{13}$

From the choices given, only x ≤ $-\frac{19}{13}$ proves to be correct answer.

3 0

4 years ago

Factor completely. -5x 2 y + 10xy - 15xy 2

slavikrds [6]

I think it is -30xy.

4 0

4 years ago

8x-y=19, y+3x=7 Ax+By=c form

Dmitriy789 [7]

Answer:

8x-y=19 is already in your Ax+By=C form

For your second one you need to switch your x and y around so

3x+y=7 gives you your Ax+By=C form

Now you want to use the system of elimination to solve the system of equations

So when you take 8x-y=19 you then add 3x+y=7

8x+3x= 11x

-y+y=0 (crosses out... why it's called elimination)

19+7=26

Your equation is now 11x=26

You then divide both sides by 11 to get

x=26/11

(Hope this helps ya ;)

7 0

3 years ago

DUE VERY SOON URGENT PLEASE HELP!!

Alla [95]

The values of x are

1. x = 32°,

2. x = 15°,

3. x = 49°,

4. x = 65°,

Explanation:

The angle made by any right angle is 90° and the angle made by a straight line is 180°. These are the main equations required to solve the values of x. The first 2 are right angles and the last 2 are straight lines. So the sum of the components within that right angle is 90° and for a straight line is 180°.

For diagram 1; 2x° + x° - 6° = 90°, 3x° = 90° + 6° = 96°, x = $\frac{96}{3}$ = 32°.

For diagram 2; 4x° + 3° + x° + 12° = 90°, 5x° = 90° - 15° = 75°, x = $\frac{75}{5}$ = 15°.

For diagram 3; x° + 33° + 2x° = 180°, 3x° = 180° - 33 = 147°, x = $\frac{147}{3}$ = 49°.

For diagram 4; 2x° + 1° + x° - 16° = 180°, 3x° = 180° + 15° = 195°, x = $\frac{195}{3}$ = 65°.

7 0

3 years ago