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2 years ago

13

Help!!

2 answers:

lutik1710 [3]2 years ago

5 0

theoretical probability is a coin will land on heads 50% of the time

50% of 100 = 50

since it only landed on heads 38 times, this was less than the theoretical probability of 50

nignag [31]2 years ago

4 0

There are two options so the theoretical probability would be 50% which was different from her experimental probability because that was only 38%. The experimental probability may be different from the theoretical probability as she only spun it 100 times which may not be enough for the probability to work and the experiment may not be fair. She may be spinning it slightly tilted or knocking it or something.

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If the 32 ounce bottle is 20% more than the typical bottle, how many ounces are in the typical bottle? Round your answer to the

Elenna [48]

6.4 %. hope that helped

4 0

2 years ago

Read 2 more answers

Can someone please check to make sure I got this correct? I would appreciate if you showed your work so that I could compare wit

dmitriy555 [2]

Answer:

-4

Step-by-step explanation:

[√2(cos(3π/4) + i sin(3π/4))]⁴

(√2)⁴ (cos(3π/4) + i sin(3π/4))⁴

4 (cos(3π/4) + i sin(3π/4))⁴

Using De Moivre's Theorem:

4 (cos(4 × 3π/4) + i sin(4 × 3π/4))

4 (cos(3π) + i sin(3π))

3π on the unit circle is the same as π:

4 (cos(π) + i sin(π))

4 (-1 + i (0))

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8 0

2 years ago

Solve for x. −18 = −2/3 x

vredina [299]

Answer:

x = 27

Step-by-step explanation:

To isolate x, we can multiply it by the reciprocal of the fraction (-3/2). We do the same to the -18.

Through cross-multiplication, -18/1 x -3/2 simplifies into -9/1 x -3/1 (because 2 goes into 2 once and 2 goes into -18 -9 times).

-9 x -3 = 27; therefore, x = 27

7 0

3 years ago

Read 2 more answers

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen

alexandr1967 [171]

The new equation after the expression equivalent to x from the first equation is substituted into the second equation is: $2(-4y-9)+5y=-6$

Step-by-step explanation:

We will solve the initial steps for substitution method for finding the correct answer

Given equations are:

$x+4y = -9\ \ \ \ Eqn1\\2x+5y=-6\ \ \ Eqn2$

From equation one

$x+4y = -9\\x+4y-4y = -9-4y\\x = -4y-9$

Putting x = -4y-9 in equation 2

$2(-4y-9)+5y=-6$

Hence,

The new equation after the expression equivalent to x from the first equation is substituted into the second equation is: $2(-4y-9)+5y=-6$

Keywords: Linear equations, variables

Learn more about linear equations at:

#LearnwithBrainly

6 0

3 years ago

students were asked to simplify the expression . two students' work is given. student a step 1: step 2: step 3: 1 tan2 θ step 4:

Whitepunk [10]

Student B is wrong , student A is correct in simplifying the expression .

Expression B must be simplified to cot θ .

Formulas to be used are :

1 - $sin^{2}$ θ = $cos^{2}$ θ

1 - $cot^{2}$ θ = $tan^{2}$ θ .

Since , location of error is step 3 , we will start from there

[ ( 1 - $sin^{2}$ θ ) / sin θ ] / cos θ = [ ( 1 - $sin^{2}$ θ ) / sin θ ] * [ 1 / cos θ ]

= ( 1 - $sin^{2}$ θ ) / ( sin θ * cos θ )

= $cos^{2}$ θ / ( sin θ * cos θ )

= cot θ .

To know more on trigonometry follow link :

brainly.com/question/24349828

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Since , the question is incomplete we assume it to be :

6 0

1 year ago