Can somebody please help .

Answer:

-72

Step-by-step explanation: 9x-1= -9 and 8x+8= 8 and then parenthesis around both equations, which mean multiply, so -9 x 8= -72 .

Answer:

100 & 80

Step-by-step explanation:

100 appears twice...same with 80

idek would it be x 90°? and f id

Check the picture below.

Answer:

5/8

Step-by-step explanation:

Answer:

B. x=negative 7

Step-by-step explanation:

sana nakatulong :-)

The balance at the end of the of 3 years is $5,229.26.

The APY of the account is 15.06%

When an amount earns annual interest that is compounded semi-annually, it means that both the amount that is invested and the interest that has already been earned increases in value twice a year.

The formula for calculating future value:

FV = P (1 + r)^nm

Where:

Balance = 5000 x (1 + 0.0075)^(2 x 3)

5000 x 1.0075^6 = $5,229.26

The annual percentage yield is the actual interest that is earned on an investment after accounting for the number of compounding.

APY = (1 + r/n)^n - 1

APY = (1 + 0.015/2)^2 - 1

APY = 1.0075^2 - 1 = 0.01506 = 15.06%

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Jill's starting salary was = 44442.38

percent raise received by Jill every year = 3.5%

After 9 years,

her salary will be = 61725.42

Increment received by Jill = 3.5 % × 61725.42

= 3.5 /100 × 61725.42

= 2160.38

Increment received by Jill in 8 years = 2160.38 × 8

= 17283.04

Starting salary of Jill = 61725.42 - 17283.04

= 44442.38

Employers have taken notice. According to another recent survey by PayScale, 85 percent of companies plan to give raises to employees in 2020 (though 71 percent of those planning to give raises are offering a 3 percent or less increase).

Plus, employees who feel good about their salaries tend to work harder, and show more loyalty to their companies. It’s important to make sure your employees feel valued for their time and efforts to grow your business.

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Answer:

220 miles

Step-by-step explanation:

$350 - $20 = $330

$330 ÷ $1.50 = 220.

Here's the formula:

$350 = $20 + $1.50x

If the value of x increases then the value of y decreases. Then the correct option is B.

The function is an expression, rule, or law that defines the relationship between one variable to another variable. Functions are ubiquitous in mathematics and are essential for formulating physical relationships.

For the inverse variation function

\(\rm y = \dfrac{k}{x}\)    (where x, k > 0),

We know that the y is inversely proportional to the x.

Thus, if the value of x increases then the value of y decreases.

Therefore, the correct option is B.

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Answer:

48

Step-by-step explanation:

\(perimeter = a + b + c \\ = 12 + 20 + 16 \\ = 48\)

Light bulbs is normally distributed with a variance of 625 and a mean lifetime of 520 hours, we need to calculate the cumulative probability up to 549 hours. The answer will be rounded to four decimal places.

Given a normally distributed lifetime with a mean of 520 hours and a variance of 625, we can determine the standard deviation (σ) by taking the square root of the variance, which gives us σ = √625 = 25.

To find the probability of a bulb lasting for at most 549 hours, we need to calculate the area under the normal distribution curve up to 549 hours. This can be done by evaluating the cumulative distribution function (CDF) of the normal distribution at the value 549, using the mean (520) and standard deviation (25).

The CDF will give us the probability that a bulb lasts up to a certain point. Rounding the result to four decimal places will provide the desired precision.

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The problem involves using normal distribution to find the probability of a given outcome. Using the Z-score, we can determine that the probability of a light bulb lasting for at most 549 hours is approximately 0.8770 or 87.70%

Given the mean (µ) of the lifetime of a bulb is 520 hours. Also, the variance (σ²) is given as 625. Thus, the standard deviation (σ) is the square root of the variance, which is 25.

To find the probability of a bulb lasting for at most 549 hours, we first calculate the Z score. The Z-score formula is given as follows: Z = (X - µ) / σ, where X is the number of hours, which is 549. So substitute the given values into the formula. Z = (549 - 520) / 25, the Z value is 1.16.

We then look up the Z-table to find the probability associated with this Z-score (1.16), which is approximately 0.8770. Therefore, the probability of a bulb lasting for at most 549 hours is approximately 0.8770 or 87.70%.

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Answer:

8

Step-by-step explanation:

800/100

= 8/1 or just 8

Answer:

8/1

Step-by-step explanation:

Convert the percent to a decimal.

800% => move the decimal two times to the right so,

8.00 as a decimal = 8/1 => 8

Based on the mean annual precipitation received at five sites, the order of rodent kidney sizes from smallest to largest at the sites are D, B, A, C, and E.

According to research, kidney sizes are correlated with precipitation. Animals from dryer environment are found to have larger kidney size. It is suggested that environments who receive lower annual rainfall have evolved larger kidneys probably to deal with aridity. As relationship between mean annual precipitation and the kidney size of rodents is being studied, average annual rainfall in five sites is recorded.

Hence, the rodent at sites with higher annual precipitation would have smaller kidney size and ones with lesser annual precipitation would have larger kidney size. Hence, the rodents at site D with the highest mean annual precipitation will have the smallest kidney size and the rodents at site E will have the largest kidney size. Based on the mean annual precipitation received at five sites, the order of rodent kidney sizes from smallest to largest at the sites are D, B, A, C, and E.

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Answer:

D

Step-by-step explanation:

Since the player is taller than the mean, he is some number of standard deviations above the mean.

He is (7.5-6.6)/0.2 = 4.5 standard deviations above the mean.

So, the answer is D.

Answer:

\(r=13.4\)

Step-by-step explanation:

From the question we are told that:

Tangent \(AB=9\)

Length \(AO=10\)

Generally the angle at tangent \(\theta=90 \textdegree\)

Therefore

Generally the equation for raduis R is mathematically given by

 \(AO^2=AB^2+BO^2\)

 \(10^2=9^2+r^2\)

 \(r=\sqrt[100+81}\)

 \(r=13.4\)

Answer:4

Step-by-step explanation:

thats all 4

Answer:

1, 2, 3, 4, 6, and 12 could all be common factors.

Step-by-step explanation:

not much explaining

B

1) Gathering the data

Theresa, Brother 1, Brother 2 and her Sister

Ages: 12 15 18

Mean: 13

2) We can find out Theresa's age by applying the Arithmetic Mean formula. There are four siblings, so 4 in the denominator. Let's call Theresa's age by "t" and replace x by 13 (the mean):

3) Hence, Theresa is 7 years old.

The value of T(v), express v as linear combination in the basis B and the matrix representation of T obtain is T(v) = [4, -4].

To find T(v), we need to express v as a linear combination of the basis vectors of R^3 with respect to B:

v = (-1)[0] + (-1)[0] + (1)[1]

This means that the coordinate vector of v with respect to B is [-1, -1, 1].

To find the matrix representation of T with respect to the standard bases of R^3 and R^2, we can apply T to each of the basis vectors:

T([1, 0, 0]) = [1, 3]

T([0, 1, 0]) = [-1, 1]

T([0, 0, 1]) = [2, -2]

We can arrange the results in a matrix:

[1 -1 2]

[3 1 -2]

The matrix [1 -1 2; 3 1 -2] represents T with respect to the standard bases of R^3 and R^2.

To find T(v), we can multiply the matrix representation of T with the coordinate vector of v with respect to B:

T(v) = [1 -1 2; 3 1 -2] * [-1; -1; 1] = [4; -4]

Therefore, T(v) = [4, -4].

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Approximately 68% of normally distributed data values will fall within 1 standard deviation of the mean. This is known as the 68-95-99.7 rule, which is a commonly used guideline for understanding the distribution of data in a normal distribution.

According to the rule, approximately 68% of the data falls within one standard deviation of the mean in a normal distribution. This means that if the data is normally distributed, about 68% of the observations will have values within the range of the mean ± one standard deviation.

To put it into perspective, if we have a bell-shaped curve representing a normally distributed dataset, the central portion of the curve, which covers one standard deviation on either side of the mean, will capture around 68% of the data.

The remaining 32% of the data will fall outside this range, with 16% falling beyond one standard deviation above the mean and 16% falling beyond one standard deviation below the mean.

It's important to note that the 68% figure is an approximation based on the assumption of a perfectly normal distribution. In practice, the actual percentage may vary slightly depending on the characteristics of the dataset.

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Answer: a graph of a line that passes through the points negative 1 comma 2 and 0 comma negative 3.

Step-by-step explanation: the y-intercept is where the line meets the y line which in this case is -3. I used slope formula to find the m of the equation ( slope ) take a look at the attached image to see how I solved it.

Answer:

a graph of a line that passes through the points negative 1 comma 2 and 0 comma negative 3.

Step-by-step explanation:

Answer:

yes look at the eslotp uudh

Both betas and correlation coefficients can tell you something about the direction of a relationship. The corect option is D.

The coefficient of variation is a ratio which is used to show the level dispersion of values or treatments around the mean of a set of values.

The coefficient of variation is the ratio of the standard deviation to the mean of a set of numbers or treatments. The higher the coefficient of variation the higher the dispersion from the mean.

The coefficient of variation is the best measure of risk for an isolated single asset. Beta is the a measure of how volatile a particular stock is compared to the market.

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A survey of 50 patients revealed that only 30 believed a new "no-show" fee was reasonable and fair. The null hypothesis, which stated that more than 50% of patients supported the fee, was rejected at a 2.5% significance level. This suggests that the administrator's decision to implement the fee would not be fair and reasonable for the majority of patients.

Given,An office administrator for a physician is piloting a new "no-show" fee to attempt to deter some of the numerous patients each month that do not show up for their scheduled appointments.She administers a survey to 50 randomly selected patients about the new fee, out of which 30 respond saying they believe the new fee is both reasonable and fair.

To test the claim that more than 50% of the patients feel the fee is reasonable and fair at a 2.5% level of significance. The null hypothesis H0: p ≤ 0.50

The alternative hypothesis Ha: p > 0.50(a) The test statistic

Z = (p - P) / √[P (1 - P) / n]

Where p = 0.6,

P = 0.5,

n = 50

Z = (0.6 - 0.5) / √[(0.5 × 0.5) / 50]

= 1.4142 (approx)

(b) The critical value(s) for the hypothesis testα = 0.025 and df = n - 1 = 49Using normal approximation Zα = 1.96 (approx)

(c) ConclusionSince the calculated test statistic (Z = 1.4142) is less than the critical value (Zα = 1.96), we fail to reject the null hypothesis at a 2.5% level of significance.

Thus, there is not enough evidence to support the claim that more than 50% of the patients feel the fee is reasonable and fair.Therefore, the administrator's decision to implement the new "no-show" fee would not be fair and reasonable to the majority of the patients.

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The standard error of the sample proportion of patients with high BMD is approximately 0.0834.

The standard error of the sample proportion of patients with high bone mineral density (BMD) can be calculated using the formula:

SE = sqrt((p * (1 - p)) / n)

In this case, the sample size (n) is 30, and the proportion of patients with high BMD in the population (p) is 147/622.

In summary, the standard error of the sample proportion of patients with high BMD can be found by calculating the square root of the product of the proportion and its complement divided by the sample size.

To explain the answer, let's plug in the values into the formula:

p = 147/622 ≈ 0.2363

n = 30

SE = sqrt((0.2363 * (1 - 0.2363)) / 30) ≈ 0.0834

Therefore, the standard error of the sample proportion of patients with high BMD is approximately 0.0834.

The standard error represents the variability or uncertainty in the sample proportion compared to the true proportion in the population. A smaller standard error indicates less variability and provides more confidence in the estimate of the population proportion.

In this case, a standard error of 0.0834 suggests that the sample proportion of patients with high BMD may vary by about 8.34% from the true proportion in the population.

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The probability for the sample space of a fair die rolled out {1, 2, 3, 4, 5, 6} with different conditions are :

a. Probability of getting 6 = 1/6

b. Probability of an even number on a die = 1/2

c. Probability of number more than 2 = 2/3.

Sample space is equal to {1, 2, 3, 4, 5, 6}

Number of times die rolled out = only once.

Total number of outcomes = 6

Probability = ( Number of favourable outcomes ) / ( Total outcomes )

Required probability in fraction form with lowest terms:

a. Probability of getting 6

Favourable outcomes ={ 6 }

Number of favourable outcomes = 1

Probability of getting 6  = 1 / 6

b. Probability of getting an even number

Favourable outcomes = { 2, 4, 6 }

Number of favourable outcomes = 3

Probability = 3 / 6

                  = 1 / 2

c. Probability of getting number greater than 2

Favourable outcomes = { 3, 4, 5, 6 }

Number of favourable outcomes = 4

Probability = 4 / 6

                  = 2 / 3

Therefore, the required probability as per the mentioned conditions are:

a. Probability of getting 6 = 1/6

b. Probability of even number = 1/2

c. Probability of number greater than 2 = 2/3.

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Given:

As, this is right angled triangle

So, the side XZ = 5.7 ( nearest to tenth)

By using the concept of LCM, it can be concluded that

It is necessary to find the LCM of polynomials to divide polynomials

What is LCM ?

LCM means least common  multiple. LCM of two numbers a and b is the least number which is divisible by both a and b.

LCM means least common multiple

As there is a question of multiple here, so there will be a concept of division into question

So it is necessary to find the LCM of polynomials to divide polynomials

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Answer:

last one - 4/-2

Step-by-step explanation:

two minus(-) becomes a plus(+)