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3 years ago

Help 8th grade math I’m not really good and I need help

Mathematics

2 answers:

Lubov Fominskaja [6]3 years ago

8 0

50 is probably the answer

Gala2k [10]3 years ago

6 0

Sum of all angles of a triangle = 180°

So,

angle E + angle O + angle C = 180°

=> 53° + 77° + C = 180°

=> 130° + angle C = 180°

=> angle C = 180° - 130°

=> angle C = 50°

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Use a shortcut method of your choice to complete the multiplication problems.

Flura [38]

Answer:

See below.

Step-by-step explanation:

a. 973 * 80

= 973 * 8 * 10

= 7784 * 10

= 77,840.

b. 56 * 2000

= 2*56 * 1000

= 112,000.

c. 5.7 * 300

= 5.7 * 3 * 100

= 17.1 * 100

= 1710.

d. 0.46 * 50

= (0.46 * 100) / 2

= 46 / 2

= 23.

4 0

4 years ago

Read 2 more answers

Open Response Factor 12m + 5n. Explain how you found your answer. (Lesson 4)

Brilliant_brown [7]

Answer:

how are u hottie here's my pfp

Step-by-step explanation:

4 0

3 years ago

When circuit boards used in the manufacture of compact disc players are tested, the long-run percentage of defectives is 5%. Let

HACTEHA [7]

Answer:

(a) The value of P (X ≤ 2) is 0.8729.

(b) The value of P (X ≥ 5) is 0.0072.

(d) The probability that none of the 25 boards is defective is 0.2774.

(e) The expected value and standard deviation of X are 1.25 and 1.09 respectively.

Step-by-step explanation:

The random variable X is defined as the number of defective boards.

The probability that a circuit board is defective is, p = 0.05.

The sample of boards selected is of size, n = 25.

The random variable X follows a Binomial distribution with parameters n and p.

The probability mass function of X is:

$P(X=x)={25\choose x}0.05^{x}(1-0.05)^{25-x};\ x=0,1,2,3...$

(a)

Compute the value of P (X ≤ 2) as follows:

P (X ≤ 2) = P (X = 0) + P (X = 1) + P (X = 2)

$P(X\leq =x)=\sum\limits^{2}_{x=0}{{25\choose x}0.05^{x}(1-0.05)^{25-x}}\\=0.2774+0.3650+0.2305\\=0.8729$

Thus, the value of P (X ≤ 2) is 0.8729.

(b)

Compute the value of P (X ≥ 5) as follows:

P (X ≥ 5) = 1 - P (X < 5)

$=1-\sum\limits^{4}_{x=0}{{25\choose x}0.05^{x}(1-0.05)^{25-x}}\\=1-0.9928\\=0.0072$

Thus, the value of P (X ≥ 5) is 0.0072.

(c)

Compute the value of P (1 ≤ X ≤ 4) as follows:

P (1 ≤ X ≤ 4) = P (X = 1) + P (X = 2) + P (X = 3) + P (X = 4)

$=\sum\limits^{4}_{x=1}{{25\choose x}0.05^{x}(1-0.05)^{25-x}}\\=0.3650+0.2305+0.0930+0.0269\\=0.7154$

Thus, the value of P (1 ≤ X ≤ 4) is 0.7154.

(d)

Compute the value of P (X = 0) as follows:

$P(X=0)={25\choose 0}0.05^{0}(1-0.05)^{25-0}=1\times 1\times 0.277389=0.2774$

Thus, the probability that none of the 25 boards is defective is 0.2774.

(e)

Compute the expected value of X as follows:

$E(X)=np=25\times 0.05=1.25$

Compute the standard deviation of X as follows:

$SD(X)=\sqrt{np(1-p)}=\sqrt{25\times 0.05\times (1-0.05)}=1.09$

Thus, the expected value and standard deviation of X are 1.25 and 1.09 respectively.

8 0

4 years ago

Rhombus BOXY has angle measures as shown in the diagram. Find the measure of /. A. 30° B. 60° C. 100° D. 120° Please select the

Bond [772]

I think it's c 100 because I need to see the diagram

6 0

3 years ago

Enter your answer and show all the steps that you use to solve this problem in the space provided. Use the binomial expression (

Nat2105 [25]

The binomial expression (p + q ) n (p+q)n to calculate the binomial distribution given will give a value of 10.

<h3>How to calculate the binomial expression?</h3>

From the information given, the expression (p + q ) n (p+q)n is given to calculate a binomial distribution with n = 5 and p = 0.3.

p = 0.3

q = 1 - 0.3 = 0.7

n = 5

Therefore, expression ( p + q ) n (p+q)n will b:

= (0.3 + 0.7)× 5 + (0.3 + 0.7)× 5

= 5 + 5

= 10

Learn more about binomial expression on:

brainly.com/question/13602562

#SPJ1

5 0

2 years ago