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Lelu [443]
2 years ago
11

Solve for x. please help me!!

Mathematics
1 answer:
Nady [450]2 years ago
7 0

Answer:

(2)(18)x

=36x

Step-by-step explanation:

sorry if its wrong i need points and i didnt quit know what this was but sorry if this was wrong and sorry if i didnt help

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math problem Just before a referendum on a school budget, a local newspaper polls 400 voters in an attempt to predict whether th
Readme [11.4K]

Answer:

The conditions necessary for the analysis are met.

The probability the newspaper’s sample will lead them to predict defeat is 0.7881

Step-by-step explanation:

We are given;

population proportion; μ = 52% = 0.52

Sample size;n = 400

The conditions are;

10% conditon: sample size is less than 10% of the population size

Success or failure condition; np = 400 x 0.52 = 208 and n(1 - p) = 400(1 - 0.52) = 192.

Both values are greater than 10

Randomization condition; we assume that the voters were randomly selected.

So the conditions are met.

Now, the standard deviation is gotten from;

σ = √((p(1 - p)/n)

where;

p is the population proportion

n is the sample size

σ is standard deviation

Thus;

σ = √((0.52(1 - 0.52)/400)

σ = √((0.52(0.48)/400)

σ = 0.025

Now to find the z-value, we'll use;

P(p^ > 0.5) = P(z > (x - μ)/σ)

Thus;

P(p^ > 0.5) = P(z > (0.5 - 0.52)/0.025)

This gives;

P(p^ > 0.5) = P(z > - 0.8)

This gives;

P(p^ > 0.5) = 1 - P(z < -0.8)

From the table attached we have a z value of 0.21186

Thus;

P(p^ > 0.5) = 1 - 0.21186 = 0.7881

Thus, the probability the newspaper’s sample will lead them to predict defeat is 0.7871

8 0
3 years ago
Read 2 more answers
Steps in solving problems involving algebraic expression?​
xeze [42]

Answer:

1. Read through the problem and figure out what it's about.

Represent numbers you don't know with variables.

Translate the problem into a mathematical expression.

Solve the problem.

Check your work.

Step-by-step explanation:

8 0
2 years ago
in a mixture of 60 litres, the ratio of milk to water is 2:1. if this ratio is to be 1:2, then find the quantity of water to be
tensa zangetsu [6.8K]

Answer:  20 liters

<u>Step-by-step explanation:</u>

The mixture is 60 liters. The ratio is 2 : 1   (2 parts to one part)

60 ÷ (2 + 1) = one part

60 ÷ 3 = 20

Therefore, the ratio of 2 : 1 means 2(20) liters milk to 1(20) liters water

If we change it to a ratio of 1 : 2, then we have 1(20) liters milk to 2(20) liters water.

2:1 ratio has 20 liters water

1:2 ratio has 40 liters water

The amount of water added is 40 - 20 = 20 liters

4 0
3 years ago
What is 4/6 dived by 3/12
Artemon [7]

Answer:

8/3

Step-by-step explanation:

8 0
3 years ago
Help me help me help me
gulaghasi [49]

Answer:

The ratio is 5:4 and the only one that fits is 25,20 so that's the answer.

Step-by-step explanation:

7 0
2 years ago
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