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Mathematics

2 answers:

Reptile [31]2 years ago

5 0

Answer:

x=3

Step-by-step explanation:

photoshop1234 [79]2 years ago

5 0

Answer:

x = 3

Step-by-step explanation:

According to parallel lines, the angle above 40x degrees is 20x because of corresponding angles in a parallel line.

Corresponding angles in || lines are congruent to each other.

A straight line is 180 degrees

20x + 40x = 180

Combine like terms

60x = 180

Divide by 60 on both sides to isolate x

x = 3

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PLEASE HELP !!!!

Bess [88]

Answer:

About 31 years

Step-by-step explanation:

Given data

Principal= $3500

Rate= 4.75%

Final amount= $15,000

Time=??

The expression for time on compound interest is

Calculate time, solve for t

t = ln(A/P) / r

substitute

Calculate time, solve for t

t = ln(15000/3500) / 0.0475

t= ln(4.2857)/ 0.0475

t= 1.4552/0.0475

t= 30.63 years

Hence it will take about 31 years

4 0

3 years ago

A researcher selects all of the possible samples with n = 8 scores from a population and computes the mean, dividing by n, for e

Nadusha1986 [10]

Answer:

By the Central Limit Theorem, the average value for all of the sample means is 14.

Step-by-step explanation:

We use the central limit theorem to solve this question.

The Central Limit Theorem estabilishes that, for a random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sample means of size n can be approximated to a normal distribution with mean $\mu$ and standard deviation, which is also called standard error $s = \frac{\sigma}{\sqrt{n}}$