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IgorC [24]
3 years ago
12

A carpenter designs an A-frame chalkboard. Its support bars form the legs of an isosceles triangle.

Mathematics
1 answer:
ahrayia [7]3 years ago
6 0

angle for triangle is 180°

angle ACB is 75° because it has mention that is an isosceles triangle

So that angle of BAC is 180°-75°-75°=30°

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At an art exhibition there are 12 paintings of which 10 are original. A visitor selects a painting at random and before decides
Reika [66]

Answer:

a) 0.8333

b) 0.75

c) 0.8181 or 0.9090

Step-by-step explanation:

a)

The probability the visitor selects an authentic painting is  

10/12 = 0.8333

b)

Since the opinion of the expert does not depend on your choice, the events are <em>independent</em>, so the probability that the expert says is authentic and it really is, is

0.8333*0.9 = 0.75

c)

If the expert decides the painting is a copy and it is not, then there are 11 paintings of which 9 are authentic, so the probability the visitor selects a new original painting is

9/11= 0.8181

If the expert decides the painting is a copy and it is, then there are 11 paintings of which 10 are authentic, so the probability the visitor selects a new original painting is

10/11= 0.9090

8 0
3 years ago
Danielle has a $30 gift card to T-Shirt-paradise . She wants to use it to buy a rock band T-shirt and a glitter T-shirt. The roc
hammer [34]
X= $18.05. Hope this helps! can i please get brainliest
5 0
2 years ago
What is the probability that there is at most one purple marble? 0.100 0.301 0.770 0.971
andriy [413]

The probability that there is at most one purple marble is 0.9701.

<h3>What is the probability  about?</h3>

Probability is a term that connote the possibility of an event or something occurring or not.

Note that it is one that is  based on the level of occurrence that can be seen in a random event.

Based on the fact that there is a  bag that has  eight yellow marbles, nine green marbles, three purple marbles, and five red marbles, the  probability that there is at most one purple marble is 0.9701.

Learn more about This probability case from

brainly.com/question/3729438

#SPJ4

3 0
2 years ago
Which of the following is a term in the algebraic expression:
tankabanditka [31]

Answer:

Hello!

____________________

Your answer would be (C).

Hope this helped you!

4 0
3 years ago
The length of a piece of lumber is 6.5 meters. How many centimeters is this?
patriot [66]
650 cm when you convert it that is what i got it is correct
4 0
3 years ago
Read 2 more answers
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