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riadik2000 [5.3K]
3 years ago
7

What did the friend do wrong in this equation?

Mathematics
1 answer:
rjkz [21]3 years ago
4 0

Answer:

4x + 2x = 90 NOT 180.

Step-by-step explanation:

x = 15 is the correct answer.

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Oksana_A [137]

Were you not given a diagram?

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A spinner has 4 equal areas. They are colored yellow blue green and red. What is the probability of landing on each color after
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Answer: you have a 25% or 1/4 probability

Step-by-step explanation:

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3 years ago
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Find the expected value of the winnings from a game that has the following payout probability distribution: Skip Payout ($) 1 2
Nezavi [6.7K]

Answer:

$4.35

Step-by-step explanation:

The expected value of a random variable <em>X</em>, often denoted as E(<em>X</em>), indicates the probability-weighted average of all possible values/events. The general formula of expected value is

\mathrm{E(\textit X \mathrm)} = \displaystyle\sum_{\mathclap{i=1}}^{k} \ X \times P(X) \\ \\ \\ = X_{1} \times P(X_{1}) \ + \ X_{2} \times P(X_{2}) \ + \ X_{3} \times P(X_{3}) + \ \cdots \ + X_{k} \times P(X_{k}).

Therefore, the expected value of the winnings from a game is

\mathrm{E(\textit X \mathrm)} \ = \ 1 \times 0.35 \ + \ 2 \times 0.2 \ + \ 5 \times 0.1 + \ 8 \times 0.2 \ + 10 \times 0.15 \\ \\ = \ 4.35 \ \ (\mathrm{nearest \ hundredth}).

4 0
2 years ago
Which statements are true about these lines? Select three options.
Evgen [1.6K]

Answer:

Line sw has an underfined slope

Line tv has a slope of 0

Line rs and tv are parallel

Step-by-step explanation: I got it right on my quiz

4 0
3 years ago
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What is the answer to 2×[4×(2+1)×3] And how did you get it
ira [324]
Answer is 72

Step by step

Using order of math rules of PEMDAS, we do the inner parentheses “P” first, working outwards with parentheses and then exponents, multiply and divide, add and subtract.

2x [4x(2+1)x3] add inner parentheses

2 x [4 x 3 x 3] multiply inside brackets

2 x 36 multiply for your answer

= 72
3 0
11 months ago
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