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2 years ago

14

Lisa flipped a coin 50 times and got a head 20 times. What was the experimental probability of flipping a heads? what is the the

oretical probability of flipping a heads?

1 answer:

yarga [219]2 years ago

3 0

Answer:

2/5 (or 0.4)

Step-by-step explanation:

There was 50 flips, that's the total. #/50

Head was 20 times, that's the answer we're looking for. 20/50

20/50 Simplified is 2/5 (or 0.4)

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The least common multiple of 20, 24, and 45 is _____.<br> A. 30<br> B. 180<br> C. 360<br> D. 21,600

Alexus [3.1K]

Answer:c because the least common multiple is 360

Step-by-step explanation:

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4 years ago

Find the coordinates of the point three tenths<br><br> of the way from A(-4, -8) to B(11, 7)

Leviafan [203]

let's first off take a peek at those values.

let's say the point with those coordinates is point C, so C is 3/10 of the way from A to B.

meaning, we take the segment AB and cut it in 10 equal pieces, AC takes 3 pieces, and CB takes 7 pieces, namely AC and CB are at a 3:7 ratio.

$\bf ~~~~~~~~~~~~\textit{internal division of a line segment}
\\\\\\
A(-4,-8)\qquad B(11,7)\qquad
\qquad \stackrel{\textit{ratio from A to B}}{3:7}
\\\\\\
\cfrac{A\underline{C}}{\underline{C} B} = \cfrac{3}{7}\implies \cfrac{A}{B} = \cfrac{3}{7}\implies 7A=3B\implies 7(-4,-8)=3(11,7)\\\\[-0.35em]
~\dotfill\\\\
C=\left(\frac{\textit{sum of "x" values}}{\textit{sum of ratios}}\quad ,\quad \frac{\textit{sum of "y" values}}{\textit{sum of ratios}}\right)\\\\[-0.35em]
~\dotfill$

$\bf C=\left(\cfrac{(7\cdot -4)+(3\cdot 11)}{3+7}\quad ,\quad \cfrac{(7\cdot -8)+(3\cdot 7)}{3+7}\right)
\\\\\\
C=\left( \cfrac{-28+33}{10}~~,~~\cfrac{-56+21}{10} \right)\implies C=\left( \cfrac{5}{10}~~,~~\cfrac{-35}{10} \right)
\\\\[-0.35em]
\rule{34em}{0.25pt}\\\\
~\hfill C=\left( \frac{1}{2}~,~-\frac{7}{2} \right)~\hfill$

4 0

3 years ago

Pls help me with this multiple choice ! (Actually try).

navik [9.2K]

Answer:

B

Step-by-step explanation:

$\sin(30) = \frac{y}{68} \\ y = 34 \\ \cos( 30) = \frac{ x }{68} \\ x = 34 \sqrt{3}$

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3 years ago

Write out the sum. Do not evaluate.<br><br>∑∑k=1 (k^2-5k-3)<img src="https://tex.z-dn.net/?f=4%5C%5CE%28K%5E2-5k-3%29%5C%5Ck%3D1

VARVARA [1.3K]

Series are sum of a given sequence.. The sum of the given expression is -33

<h3>Sequence and series</h3>

Series are sum of a given sequence. According to the given expression

∑∑k=1 (k^2-5k-3)

Taking the sum from k = 1 to k = 4

Sum = (1-5-3) + (4-10-3) +(9-15-3)+(15-20-3)

Sum = (-7) + (-9) + (-9) + (-8)

Sum = -33

Hence the sum of the given expression is -33

Learn more on sum notation here: brainly.com/question/542712

#SPJ1

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2 years ago

5 ÷ 3/5 =?<br><br>A ?<br><br>B ?<br><br>C?<br><br>Or D?

Tanya [424]

Answer:

D

Step-by-step explanation:

I can’t give a step-by-step explanation but it’s D

5 0

3 years ago

Read 2 more answers