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3 years ago

What is the answer to #14?

Mathematics

1 answer:

scZoUnD [109]3 years ago

7 0

It think it’s 6x...!

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I need help with this,, will give brianliest and +15 points

Anit [1.1K]

Answer:

41x² - 27x + 27

Step-by-step explanation:

Perimeter of Rectangle:

= 2(20x²-12x+4) + 2(5x²-5x+15)

= 40x²-24x+8 + 10x²-10x+30

= 50x²-34x+38

Perimeter of Triangle:

= 6x²+6x+3x+3+3x²-2x+8

= 9x²+7x+11

Difference:

(50x²-9x²)+(-34x+7x)+(38-11)

= 41x² - 27x + 27

8 0

2 years ago

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

What is 4x +12=20 proof

dimulka [17.4K]

4x+12=20
-12 -12
——————
4x=8
divide by 4 on both sides
x=2

3 0

3 years ago

PLEASE HELP! 85 POINTS This needs submitted in a hour or less! Thank You in advance!

vlabodo [156]

Answer:

It is 20x plus 2

Step-by-step explanation:

5 0

3 years ago

Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2h, and Car B traveled the distan

mote1985 [20]

Let the speed of car B be x.
Car B is faster than car A 15mph so the speed of car A would be: x-15.
From the problem, we could come up with an equation:
$2(x - 15) = 1.5x \\ x = 60$
So car B was traveling at 60mph

4 0

3 years ago