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goldfiish [28.3K]

4 years ago

8

100 points! Evaluate the equation. Look at the picture. Do #7.

2 answers:

Murrr4er [49]4 years ago

6 0

10C6 = 10!/(6!*(10-6)!) = 10*9*8*7/(4*3*2*1) = 210

There are 210 ways to choose 6 from a group of 10.

Alja [10]4 years ago

5 0

Answer:

well if you coose 6 people to form a volleyball team out of a group of 10 players that would be 210 ways to choose 6 from a group of 10.

~batmans wife dun dun dun...aka ~serenitybella

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While on a business trip to Richmond, Alexa treated her co-workers to a

Zinaida [17]

Answer:

<u>$192</u>

Step-by-step explanation:

5% = 0.05

160 x 0.05 = $8 (sales tax)

15% = 0.15

160 x 0.15 = %24 (tip)

$8 + $24 = 32

$160 + $32 = $192

7 0

3 years ago

The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. Which equation models t

Zanzabum

Answer: [H+] = 10^-7.2

Step-by-step explanation:

Given that the PH of the solution = 7.2

Using the formula pH = –log[H+]. To get the H+ concentration from the pH, raise both sides by the base of 10. Then we have

10^ -pH = H+. with pH of 7.2,

Thus the answer to this problem is

[H+] = 10^-7.2

8 0

4 years ago

Pre-Calculus - Systems of Equations with 3 Variables please show work/steps

Tatiana [17]

Answer:

x = 10 , y = -7 , z = 1

Step-by-step explanation:

Solve the following system:

{x - 3 z = 7 | (equation 1)

2 x + y - 2 z = 11 | (equation 2)

-x - 2 y + 9 z = 13 | (equation 3)

Swap equation 1 with equation 2:

{2 x + y - 2 z = 11 | (equation 1)

x + 0 y - 3 z = 7 | (equation 2)

-x - 2 y + 9 z = 13 | (equation 3)

Subtract 1/2 × (equation 1) from equation 2:

{2 x + y - 2 z = 11 | (equation 1)

0 x - y/2 - 2 z = 3/2 | (equation 2)

-x - 2 y + 9 z = 13 | (equation 3)

Multiply equation 2 by 2:

{2 x + y - 2 z = 11 | (equation 1)

0 x - y - 4 z = 3 | (equation 2)

-x - 2 y + 9 z = 13 | (equation 3)

Add 1/2 × (equation 1) to equation 3:

{2 x + y - 2 z = 11 | (equation 1)

0 x - y - 4 z = 3 | (equation 2)

0 x - (3 y)/2 + 8 z = 37/2 | (equation 3)

Multiply equation 3 by 2:

{2 x + y - 2 z = 11 | (equation 1)

0 x - y - 4 z = 3 | (equation 2)

0 x - 3 y + 16 z = 37 | (equation 3)

Swap equation 2 with equation 3:

{2 x + y - 2 z = 11 | (equation 1)

0 x - 3 y + 16 z = 37 | (equation 2)

0 x - y - 4 z = 3 | (equation 3)

Subtract 1/3 × (equation 2) from equation 3:

{2 x + y - 2 z = 11 | (equation 1)

0 x - 3 y + 16 z = 37 | (equation 2)

0 x+0 y - (28 z)/3 = (-28)/3 | (equation 3)

Multiply equation 3 by -3/28:

{2 x + y - 2 z = 11 | (equation 1)

0 x - 3 y + 16 z = 37 | (equation 2)

0 x+0 y+z = 1 | (equation 3)

Subtract 16 × (equation 3) from equation 2:

{2 x + y - 2 z = 11 | (equation 1)

0 x - 3 y+0 z = 21 | (equation 2)

0 x+0 y+z = 1 | (equation 3)

Divide equation 2 by -3:

{2 x + y - 2 z = 11 | (equation 1)

0 x+y+0 z = -7 | (equation 2)

0 x+0 y+z = 1 | (equation 3)

Subtract equation 2 from equation 1:

{2 x + 0 y - 2 z = 18 | (equation 1)

0 x+y+0 z = -7 | (equation 2)

0 x+0 y+z = 1 | (equation 3)

Add 2 × (equation 3) to equation 1:

{2 x+0 y+0 z = 20 | (equation 1)

0 x+y+0 z = -7 | (equation 2)

0 x+0 y+z = 1 | (equation 3)

Divide equation 1 by 2:

{x+0 y+0 z = 10 | (equation 1)

0 x+y+0 z = -7 | (equation 2)

0 x+0 y+z = 1 | (equation 3)

Collect results:

Answer: {x = 10 , y = -7 , z = 1

3 0

3 years ago

Help please. Find A if possible

zlopas [31]

Answer:

10

Step-by-step explanation

4 0

3 years ago

Read 2 more answers

The Doctor has ordered Valtrex 2Gm initial dose for a patient, then 1Gm qd x 7 days. How many miligrams of Valtrex will the pati

ahrayia [7]

Answer: 9,000 miligrams

Step-by-step explanation:

The initial dose of Valtrex ordered to a patient= 2 gm

After that the dose of Valtrex per day= 1 gm

The total amount of Valtrex in eight days= Initial dose+7 times dose per day

⇒The total amount of Valtrex in eight days $=2\ gm+7\times1\ gm$

⇒The total amount of Valtrex in eight days $=2\ gm+7\ gm$

⇒The total amount of Valtrex in eight days $=9\ gm$

We know that $1\ gm=1000\ miligrams$

Thus, $9\ gm= 9\times1000=9,000\ milligrams$

Hence, the patient take 9,000 milligrams of Valtrex over the eight day period.

3 0

3 years ago