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4 years ago

What's 6 c ^ 2 + 2.5 D - D + 2C ^ 2 - 3D what is that simplified

Mathematics

1 answer:

adell [148]4 years ago

4 0

I'm assuming that the lower case c and the upper case C are the same variables.

6C^2 + 2.5D - D + 2C^2 - 3D = 8C^2 - 1.5D

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A club with 50 college students is doing volunteer work this semester. Each student is volunteering at one of four locations. He

Yuliya22 [10]

Answer: Our required probability is 0.58.

Step-by-step explanation:

Since we have given that

Number of students worked in Nursing home = 11

Number of students worked in Tutoring center = 13

Number of students worked in Soup kitchen = 8

Number of students worked in Library = 18

Total number of students = 50

Since 3 students are selected from the club.

We need to find the probability that none of the three students volunteer at the soup kitchen.

So, Remaining students would be 50-8 = 42

So, probability that none of three students at the soup kitchen is given by

$\dfrac{^{42}C_3}{^{50}C_3}\\\\=0.58$

Hence, our required probability is 0.58.

4 0

4 years ago

Solve for x on triangle with 12 and 43 and round final answer to the nearest tenth

alexdok [17]

Step-by-step explanation:

i just tried i guess this will help

8 0

4 years ago

Solve each question using elimination<br> -4x-2y=-12<br> 4x+8y=-24

34kurt

Answer:

(3,6) or x= 3 and y= 6

(-6,-3) or x= -6 and y= -3

8 0

3 years ago

Plot the zeros of the polynomial y = x4 + 3x3 − 27x2 + 13x + 42

a_sh-v [17]

Answer:

See explanation

Step-by-step explanation:

Consider the polynomial $y=x^4+3x^3-27x^2+13x+42$ 4th power polynomial function has at most 4 zeros.

Integer zeros can be only among the divisors of 42:

$\pm1, \ \pm 2,\ \pm 3,\ \pm 6,\ \pm 7,\ \pm 14,\ \pm 21,\ \pm 42$

Check them:

$y(1)=1^4+3\cdot 1^3-27\cdot 1^2+13\cdot 1+42=1+3-27+13+42=32\neq 0\\ \\y(-1)=(-1)^4+3\cdot (-1)^3-27\cdot (-1)^2+13\cdot (-1)+42=1-3-27-13+42=0\\ \\y(2)=2^4+3\cdot 2^3-27\cdot 2^2+13\cdot 2+42=16+24-108+26+42=0\\ \\y(3)=3^4+3\cdot 3^3-27\cdot 3^2+13\cdot 3+42=81+81-243+39+42= 0\\ \\y(-7)=(-7)^4+3\cdot (-7)^3-27\cdot (-7)^2+13\cdot (-7)+42=2,401-1,029-1,323-91+42= 0$

Thus,

$y=(x+7)(x+1)(x-2)(x-3)$

Zeros are plotted in attached diagram.

4 0

4 years ago

Read 2 more answers

What decision rules are the best/worst? Be able to rank the rules from worst-to-best or best-to-worst.

Sati [7]

Answer:

NPV, IRR, payback.

Step-by-step explanation:

The best worst decision technique involves the choice modelling. In terms of the overall usefulness in the capital budgeting decisions,

-- the decision rule that is best is the NPV

-- the decision rule that is worst is payback period

The NPV capital budgeting tool provides accurate results and it also assumes cash flow can be reinvested at a discount rate.

The IRR is the second best budgeting tool where it assumes that the cash flows can be reinvested at IRR.

And the worst is the payback where it does not take into account its time value of the money and so it does not yield the correct as well as accurate results.

Therefore, ranking the rules from best to worst is : NPV, IRR, payback.

5 0

3 years ago