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3 years ago

Question 5 of 10

Mathematics

1 answer:

professor190 [17]3 years ago

5 0

Answer:

4x+1+x2-5

x2+4x-4

the answer is A

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Simplify the expression 6C2

iVinArrow [24]

Answer:

$^6C_2=15$

Step-by-step explanation:

Recall the formula:

$^nC_r=\frac{n!}{(n-r)!r!}$

We apply this formula to simplify $^6C_2$

This implies that:

$^6C_2=\frac{6!}{(6-2)!2!}$

$^6C_2=\frac{6!}{4!2!}$

$^6C_2=\frac{6\times5\times4!}{4!\times 2\times1}$

This simplifies to

$^6C_2=\frac{6\times5}{2\times1}$

$^6C_2=\frac{3\times5}{1\times1}=15$

8 0

3 years ago

Meg has a can that contains 80% of orange juice and the rest water. The can has 1 liter of water.

Anestetic [448]

B) Since 80% is orange juice so you know that 20% is water. And it says there is 1L water. Therefore 20% = 1. (4) X 20%=1 X (4) The answer is 4L of orange juice.

A) I am not sure Sorry.

7 0

3 years ago

Pls help fast !!!!!!!!!!!!!!!!!!!!!!!!

Sergeeva-Olga [200]

Answer:

$\frac{2}{3}$

Step-by-step explanation:

⅓×2

When multiplied by 2 will be;

$\frac{1}{3} \times \frac{2}{1}$

So you 2×1=2

3×1 is equal to 3

So the final answer will be;

$\frac{2}{3}$

4 0

3 years ago

Read 2 more answers

Suppose a student carrying a flu virus returns to an isolated college campus of 2000 students. Determine a differential equation

ad-work [718]

Answer:

x(t) = 2000 - e^(-k*t)

Step-by-step explanation:

Interpretation:

No . infected student = x

Total student = 2000

rate of infected students = dx / dt

not-infected student = 200 - x

The general rate at which student are infected can be expressed as below:

dx / dt = k * ( 2000 - x )

To develop an expression of x(t) we integrate the above expression by separating variables:

dx / (2000 - x ) = k * dt

Now integrate:

$\int\limits{\frac{1}{(2000-x)} } \, dx = k * \int\limits{dt}\\\\- ln (2000-x) = k*t + C\\\\$

@ t = 0 , infected students x = 0

Hence,

C = - ln (2000)

$- ln (2000-x) = k*t + - ln (2000)\\\\ln (\frac{2000-x}{2000}) = -k*t\\\\ 2000 - x = e^(-kt)\\\\x(t) = 2000 - e ^ (-k*t)$

6 0

3 years ago

HELP ASAP An office employee ears $600 weekly. Find the equivalent earnings if paid biweekly, semimonthly, monthly, and annually

beks73 [17]

1200~bi-weekly

1200~semimonthly

2400~monthly

31,200~annually

6 0

3 years ago