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2 years ago

What is the value of x and the measure of ∠DBC, respectively?

Mathematics

2 answers:

dmitriy555 [2]2 years ago

7 0

Answer:

Hmm i don't know is A B C D

CBA should be hmm 90 degrees I think

Then you should be able to calculate

it's so easy

Step-by-step explanation:

Veseljchak [2.6K]2 years ago

4 0

Answer:

D. x = 18; ∠DBC = 54

Step-by-step explanation:

m∠ABD + m∠CBD = 90°

2x + 3x = 90°

5x = 90°

x = 18°

m∠DBC = 3x

m∠DBC = 3(18°)

m∠DMC = 54°

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If cells are: a1=90, a2=85, a3=80, a4=75, and a5=75. what will be your formula if you are going to get the average?

swat32

The average can be given by the following formula:
Average = (a1 + a2 + a3 + a4 + a5) / (5).
Equivalently.
Average = (ai) / (i).
Where,
i = 1,2,3,4, ..., n
Substituting
Average = (90 + 85 + 80 + 75 + 75) / (5).
Average = 81
answer:
Average = (a1 + a2 + a3 + a4 + a5) / (5).
or
Average = (ai) / (i).
Where,
i = 1,2,3,4, ..., n

8 0

3 years ago

18. The equation of a linear relation is:

horrorfan [7]

Answer:

See below

Step-by-step explanation:

So basically, your orders pairs are like this (x,y) and you're just replacing those variables with the numbers in the equations.

Like such:

3 0

3 years ago

Read 2 more answers

Cole buys a laptop for 335. He makes a $50 down payment and pays the rest in 6 equal payments,p. What equation represents the re

victus00 [196]

Answer:

The equation representing the relationships between the cost of laptop and Cole's payment is $50+6p=335$ .

Step-by-step explanation:

Given:

Cost of laptop = 335

Down payments = $50

Number of equal payments = $6p$

We need to write the equation form the relationships between the cost of laptop and cole's payment.

Solution:

Now we can say that;

Cost of laptop is equal to sum of Down payments and Number of equal payments.

framing in equation form we get;

$50+6p=335$

Hence The equation representing the relationships between the cost of laptop and Cole's payment is $50+6p=335$ .

6 0

3 years ago

Let x be a binomial random variable with n = 15 and p= .5. Using the exact

alexandr1967 [171]

Answer: Choice C) 0.6964; 0.6972

============================================

Work Shown:

n = 15

p = 0.5

q = 1-p = 1-0.5 = 0.5

P(k) = (n C k)*(p)^k*(q)^(n-k)

P(k) = (15 C k)*(0.5)^k*(0.5)^(15-k)

----------------

If you plug in k = 7, then we get,

P(k) = (15 C k)*(0.5)^k*(0.5)^(15-k)

P(7) = (15 C 7)*(0.5)^7*(0.5)^(15-7)

P(7) = 6435*(0.5)^7*(0.5)^8

P(7) = 0.1964

-----------------

Repeat for k = 8 all the way through k = 15. You could do this by hand, but I recommend using a spreadsheet to make things go much quicker.

Once you determine those values, add them up and you should get 0.6964 which is the binomial probability we want.

------------------

As for the normal approximation, you'll need to compute the mu and sigma to get

mu = n*p = 15*0.5 = 7.5
sigma = sqrt(n*p*q) = sqrt(15*0.5*0.5) = 1.93649 which is approximate.

The normal distribution will have those parameters.

Since we're using a continuity correction, we need to bump the x = 6 up to x = 6.5, since we want to be larger than 6

Let's find the z score

z = (x - mu)/sigma

z = (6.5 - 7.5)/(1.93649)

z = -0.516398

Now use a Z table or a calculator to determine that P(Z > -0.516398) = 0.6972 approximately. If you're using a TI calculator, then you'll use the normalCDF function. If you're using excel, then you would use the NormDist function (make sure to turn the cumulative flag to "true"). Alternatively, you can search out free z calculators to get the job done.

7 0

3 years ago

!!!!ANSWER QUICK PLEASE!!!!!

masya89 [10]

this is a kindergarten question.

6 times 2 is 12.

12 is the answer.

4 0

3 years ago