Please help meeeeee

A painter leans a 20 ft ladder against a building. The base of the ladder is 8 ft from the building. To the nearest foot, how hi

Shalnov [3]

Answer:

Step-by-step explanation:

This is asking what is A

Formula A squared + B squared = C squared

A=x

B=8

C=20

X^2+ 8^2=20^2

8 squared is 64

20 squared is 400

400-64 is 336

X*X=336 find the square root of 336 =18.3

CHECK

18.3*18.3+ 8*8=398.89 which is super close to 400

5 0

3 years ago

What’s 1,979 divided by 3 ?

xz_007 [3.2K]

It is equal to 1979/3

7 0

3 years ago

Read 2 more answers

Suppose that 80 percent of all statisticians are shy, whereas only 15 percent of all economists are shy. Suppose also that 90 pe

Anna71 [15]

Answer:

37.21% probability that the person is a statistician.

Step-by-step explanation:

We have these following probabilities:

An 80% probability that a statistican is shy.

A 15% probability that an economist is shy.

At the gathering, a 90% probability that a person is an economist.

At the gathering, a 10% probability that a person is a statistican.

If you meet a shy person at random at the gathering. What is the probability that the person is a statistician?

This can be formulated as the following question:

What is the probability of B happening, knowing that A has happened.

It can be calculated by the following formula

$P = \frac{P(B).P(A/B)}{P(A)}$

Where P(B) is the probability of B happening, P(A/B) is the probability of A happening knowing that B happened and P(A) is the probability of A happening.

So

What is the probability that the person is a statistican, given that he is shy?

P(B) is the probability of the person being a statistican. So P(B) = 0.1.

P(A/B) is the probability of a statistican being shy, so P(A/B) = 0.8.

P(A) is the probability of a person being a shy. This is 15% of 90%(economists) and 80% of 10%(statisticans). So

$P(A) = 0.15*0.9 + 0.8*0.1 = 0.215$

Finally

$P = \frac{P(B).P(A/B)}{P(A)}$

$P = \frac{0.1*0.8}{0.215} = 0.3721$

37.21% probability that the person is a statistician.

3 0

4 years ago

Use the Distributive Property to find the missing factors. Enter your answers in the boxes. 6 × = (3 × 7) + ( × 7)

musickatia [10]

The missing number is 3

5 0

3 years ago

Given: AB is congruent to CD and BC is congruent to AD Prove: AB ll CD and BC ll AD

kifflom [539]

<h2>Given</h2>

A quadrilateral ABCD with opposite pairs of sides being congruent.

<h2>To prove</h2>

Opposite sides are parallel.

<h2>Solution</h2>

We'll prove first the triangles formed by diagonal are congruent then we'll prove the angles on either side of diagonal are congruent.

<u>The steps are:</u>

Step ⇒ Statement ⇒ Reason

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

1 ⇒ AB ≅ CD and BC ≅ AD ⇒ Given
2 ⇒ AC = CA ⇒ Common side
3 ⇒ ΔABC ≅ ΔCDA ⇒ Side-side-side congruence
4 ⇒ ∠BAC ≅ ∠DCA ⇒ Corresponding angles of congruent triangles
5 ⇒ ∠BAC and ∠DCA are alternate interior angles ⇒ Definition of alternate interior angles
6 ⇒ AB║CD ⇒ The converse of alternate interior angles theorem
7 ⇒ ∠BCA ≅ ∠DAC ⇒ Corresponding angles of congruent triangles
8 ⇒ ∠BCA & ∠DAC are alternate interior angles ⇒ Definition of alternate interior angles
9 ⇒ BC║AD ⇒ The converse of alternate interior angles theorem

4 0

2 years ago