# I really need help I posted this question 3 times and no answers, can someone help I even put extra points and ill give brainliest <333

In a quadrilateral ABCD, ∠A = 100°, ∠B = 105° and ∠C = 70°, find ∠D.

Solution:

Here the sum of the four angles

or, ∠A + ∠B + ∠C + ∠D = 360°

We know, ∠A = 100°, ∠B = 105° and ∠C = 70°

or, 100° + 105° + 70° + ∠D = 360°

or, 275° + ∠D = 360°

∠D = 360° - 275°

Therefore,  = 85°

i hope this was helpful. <3

crown?

## Related Questions

Find the value of X.

2+3x=62

3x=60

x=20

Hope this helps! Brainliest? :D

Solve the equation x/4 - 7 = y for x

x = 4y + 28

Step-by-step explanation:

x/4 - 7 = y

+7              +7

x/4 = y + 7

× 4             × 4

x = 4y + 28

x = 4y + 28

Step-by-step explanation:

For this, you would need to simplify both sides of the equation, after isolating the variable.

What is the probability that the average of four babies' weights will be within .6 pounds of the mean; will be between 8.4 and 9.6 pounds

The probability will be "0.7497".

Given:

Mean,

• 9

Standard deviation,

• 0.6

Number of babies,

• 4

The standard error of sample will be:

hence,

→ P(4 babies will be between 8.4 - 9.6 pounds)

Thus the above response is right.

brainly.com/question/14008215

Complete question:

Some sources report that the weights of​ full-term newborn babies in a certain town have a mean of 9 pounds and a standard deviation of 0.6 pounds and are normally distributed.

Step-by-step explanation:

Mean = 9

sd = 0.6

n = 4

P(4 babies will be between 8.4 and 9.6 pounds)

P(8.4 ≤ X ≤ 9.6)

Standard error of the sample (S. E) :

S. E = sd/√n

= 0.6 /√4

= 0.6/2

= 0.3

P(8.4 ≤ X ≤ 9.6)= ((P(8.4 - 9) / 0.3) ≤ X ≤ (9.6 - 9)/0.3)

P(8.4 ≤ X ≤ 9.6) = P(-2 ≤ X ≤ 2)

P(Z ≤ 2) - P(Z < - 2)

0.9772 - 0.2275 = 0.7497

Wendell’ Plumbing Supply sold metal piping at $36.50 per 15 yard length. What would75.4 meter of piping cost? 1.0 meter = 1.09 yards ### Answers The answer would be$198.93

Refer to Problem 5.22. How many cookies in a batch of 100should the manager expect to discard if company policy requires
that all chocolate-chip cookies sold have at least four chocolate-chip
parts?

The answer is 2.1

Step-by-step explanation:

To find:

X = number of chips per cookies

Now use the Poisson distribution.

Now, starting from 0 make add four equations like below.

P(x = 0) + P(x = 1) + P(x = 2) + P(x = 3) = 0.021

After this multiple it by 100

And you get 2.1!

Therefore, the answer is 2.1

If C=X + 6 and D=3X -6 + 4x to the second power of 4x if an expression that equals C + 3D in standard form.