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Naily [24]
3 years ago
15

Can someone plz help me with this math problem.

Mathematics
1 answer:
frozen [14]3 years ago
8 0
This may not be correct, but my answer is 4.
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What value represents the number of ways in which the expected classes are free to vary in the chi-square goodness-of-fit test?
Ket [755]

In statistics, the number of degrees of freedom is the number of values in the final calculation of a statistic that are free to vary.

The number of independent ways by which a dynamic system can move, without violating any constraint imposed on it, is called number of degrees of freedom. In other words, the number of degrees of freedom can be defined as the minimum number of independent coordinates that can specify the position of the system completely.

<span>
The degree of freedom
represents the number of ways in which the expected classes are free to vary in the chi-square goodness-of-fit test.</span>

8 0
3 years ago
3x2 + 5x - 7(x2 + 4)
goldenfox [79]

Answer:

-4x^2+5x-28

Step-by-step explanation:

Expand -7(x^2 +4) = 3x^2+5x-7x^2-28

Simplify 3x^2+5x-7x^2-28 = -4x^2+5x-28

5 0
2 years ago
Read 2 more answers
Solve for x. 2x + 9 = 33 What is the answer?<br><br> A 7.5<br><br> B 12<br><br> C 21<br><br> D 84
Valentin [98]
B, because you subtract 9 from both sides(2x-9 leaves 2x by itself then 33-9=24), which leaves you with 2x=24 the you divide everything by 2 which leaves you with x=12

8 0
3 years ago
Read 2 more answers
You have decided to purchase a car for $25,625. The credit union requires a 10% down payment and will finance the balance
swat32

Answer:

Total purchase = $28498.685

In cent = 2849868.5 cent.

Step-by-step explanation:

Given : You have decided to purchase a car for 175.13.

To find : What is the total purchase price of the car including tax, license, and title?

Solution :

Price of car = $25,625

Sales tax = 7.5% = 0.075

The total purchase price of the car including tax is

T=25625\times 0.075=\$1921.875T=25625×0.075=$1921.875

Title charges are $175.13.

The credit union requires a 10% down payment and will finance the balance with a 9% annual interest loan for 36 months.

10% down payment on price of car

25625\times 0.10=2562.525625×0.10=2562.5

25625-2562.5=23062.525625−2562.5=23062.5

The amount will be $23062.5

Now, we find the monthly payment,

Monthly payment, M=\frac{\text{Amount}}{\text{Discount factor}}M=

Discount factor

Amount

​

Discount factor D=\frac{1-(1+i)^{-n}}{i}D=

i

1−(1+i)

−n

​

Rate = 9%=0.09

i=\frac{0.09}{12}=0.0075i=

12

0.09

​

=0.0075

Time n=36 month

Now, put all the values we get,

D=\frac{1-(1+i)^{-n}}{i}D=

i

1−(1+i)

−n

​

D=\frac{1-(1+0.0075)^{-36}}{0.0075}D=

0.0075

1−(1+0.0075)

−36

​

D=\frac{1-(1.0075)^{-36}}{0.0075}D=

0.0075

1−(1.0075)

−36

​

D=\frac{0.2358}{0.0075}D=

0.0075

0.2358

​

D=31.44D=31.44

Monthly payment, M=\frac{\text{Amount}}{\text{Discount factor}}M=

Discount factor

Amount

​

M=\frac{23062.5}{31.44}M=

31.44

23062.5

​

M=733.38M=733.38

Monthly payment is $733.38

For 36 months the payment is 733.38\times 36=26401.68733.38×36=26401.68

Licence = $26401.68

The total purchase price of the car including tax, license, and title

Total purchase = 1921.875 +1921.875+175.13 +$26401.68

Total purchase = $28498.685

1 dollar = 100 cent

$28498.685 = 2849868.5 cent.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
I need the base and hight
iris [78.8K]

Answer:

Height = 5 and Base = 10

Step-by-step explanation:

The base of the parallelogram is twice the perpendicular height of the parallelogram. The area of the parallelogram is 50 cm².

Formula for area of parallelogram = base × height

Base = 2h

Height = h

∴ Area = 2h × h = 50

Solution:

2h × h = 50

2h² = 50

\frac{2h^{2} }{2} = \frac{50}{2}

h² = 25

\sqrt{h^{2} } = \sqrt{25}

h = 5

∴ height = 5 and base = 2(5) = 10

4 0
2 years ago
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