please help, im sick and im having a mental breakdown right now.​

The points scored by Joseph is 63.

The points scored can be calculated using the formula

Z = (X - μ)/σ

We need to rearrange this equation, in order to find the value of x

Thus,

X - μ = Zσ

X = Zσ + μ

Where Z-score is given as -2

            μ is an average score which is given as 71

            σ is the  standard deviation which is given as 4

By substituting these values, we get

X = (-2)(4) +71

X = -8 + 71

X = 63

Therefore, the points scored by Joseph is 63.

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Given the following system of equations:

We will solve the system by elimination as follows:

Substitute x = 20 into the second equation to find (y):

So, the value of y = -36

The answer will be option A. -36

Ratio of total circles to total shapes is 4 : 7

An equation is an expression that shows the relationship between two or more variables and numbers.

There are 8 triangles and 6 circles. The ratio of total circles to total shapes is given by:

Ratio of total circles to total shapes = 8 circles : (8 + 6) shapes

Ratio of total circles to total shapes = 8 : 14 = 4 : 7

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Answer:

lets just say -8

Step-by-step explanation:

Answer:

x = 2  or  x = -6

Step-by-step explanation:

|2x + 4| = 8

2x + 4 = 8  or  2x + 4 = -8

2x = 4  or 2x = -12

x = 2  or  x = -6

You will have $50,000 in your account after 50 years.

We have,

Simple interest formula is given by:

I = Prt

Where:

I = interest earned

P = principal amount (initial investment)

r = interest rate

t = time (in years)

Here,

P = $10,000

r = 8%

t = 50 years

So, the interest earned after 50 years will be:

I = Prt

= 10000 x 0.08 x 50

= $40,000

The total amount in the account after 50 years will be the initial investment plus the interest earned:

Total amount = $10,000 + $40,000 = $50,000

Therefore,

You will have $50,000 in your account after 50 years.

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Answer: 1

Step-by-step explanation:

The form of the slope-intercept of the linear equation is

m is the slope

b is the y-intercept

Since the slope of the line is 2/3, then

Substitute it in the form of the equation

Since the line passes through the point (-9, 5), then

Substitute x in the equation by -9 and y by 5 to find the value of b

Add 6 to both sides

Then the equation of the line is

Answer:

Step-by-step explanation:

4^(4-7+1) = 4^-2

Answer: 4⁻²

Step-by-step explanation:

Use the power rule to combine exponents

4⁴ ⁻⁷ · 4

Subtract 7 from 4.

4⁻³ · 4

Multiply 4⁻³ by 4 by adding the exponents.

4⁻³ ⁺¹

Add -3 and 1

4⁻² is the answer

Combining like terms yields 7x⁵ - x³ - x² + 4x.

Answer:

18%

Step-by-step explanation:

Divide 64/303.

Divide 9/303.

Subtract the answers and you'll get 18%.

The percentage of the sample population with brown eyes and black hair is larger than the percentage of the sample population with blue eyes and black hair by 18.25%

In mathematics, a percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%"

Given here, according to the survey, the population with Brown eyes & black hair and Blue eyes and black hair  is 64 and 9 respectively

Also, the marginal total is equal to 303

therefore, the percentages of the two groups are

Brown eyes & black hair =64/303 × 100

                                         = 21.12%

similarly we can calculate  Blue eyes and black hair = 9/303 × 100

                                                                                      = 2.97%

Hence the difference is  21.22% - 2.97% =  18.25% (approx)

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the slope of the line is zero, as change in y cordintae is 0.

What is the slope of line?

Given two line-side coordinates, use the slope formula to determine the slope of the line. The slope is defined as the ratio of the change in the y values to the change in the x values using the formula m=(y2-y1)/(x2-x1). x1 and y1 are represented by the first point's coordinates. The second points are located at x2, y2, and their locations. Whichever point you choose to classify as the first and which as the second doesn't matter.

In the given line in the graph, the change in y coordinate is 0.

We know that slope = change in y / change in x

As the change in y coordinate is 0.

The slope of the line will be zero.

Hence, the slope of the line is zero.

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Since the test statistic (2.53) falls within the critical values (-2.576 and 2.576), we fail to reject the null hypothesis.

To test the claim that the proportion of American adults who eat salad once a week is equal to 80%, we will conduct a hypothesis test.

Claim: p = 0.80

Opposite: p ≠ 0.80

The test is a two-tailed z-test.

Sample proportion (p) = 374/445 = 0.8404

Test statistic= (0.8404 - 0.80) / sqrt((0.80 * (1 - 0.80)) / 445)

z = 2.53 (rounded to 2 decimals)

Significance level (α) = 0.005, so the critical values for a two-tailed test are -2.576 and 2.576.

Since the test statistic (2.53) falls within the critical values (-2.576 and 2.576), we fail to reject the null hypothesis.

Conclusion: There does not appear to be enough evidence to reject the claim that the proportion of American adults who eat salad once a week is equal to 80%.

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Option C

Olivia paid $ 15683.28 after 8 years

Answer:

(3xy - 1)/3x = b

Step-by-step explanation:

make b the subject of formula

then simply it

did you get it

Answer:

b=Y-x/3

Step-by-step explanation:

Solve for b by simplifying both sides of the equation, then isolating the variable.

have a great day and thx for your inquiry :)

The function in the graph corresponds to

You have to evaluate the function e⁻¹'⁵ using the graph you have to identify x=-1.5 in the graph and follow the function to determine the corresponding value of y.

The value of y for e⁻¹'⁵ is around 0.2

Answer: f(x) has an axis of symmetry at x = 4 and h(x) has an axis of symmetry at x = -2

Step-by-step explanation:

You can easily find the axis of symmetry by investigating around which line the functions are symmetrical about

for instance, in h(x), the graph is symmetrical on either side of x = -2, meaning that the line x = -2 cuts the parabola in 'half'

in f(x), this is a little harder to think about, but if you know how the graph will be shifted on the x-axis you can figure it out! In this case (x-4)^2 means that the graph will be shifted on the x-axis 4 units to the right (or from the origin to +4 on the X axis)

as such the line x = 4 will cut the function f(x) in 'half'

According to the information we can infer that the total yardage traveled from 0 to 120 seconds is 140 yards.

To calculate the total yardage traveled we have to consider the movement of the O'Connor Panthers. In this case we have to consider that the movement in the y axis.

In this case we can conclude that the total yardage traveled was 140 yards because:

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Answer:

41.93 degrees

Step-by-step explanation:

The statement which median describe about Grace's data set is 2 is the middle number when the number of pets in the data set is arranged from least to greatest.

The median of the data is the middle value of the data set when it arrange in ascending or descending order.

Grace collected data from twenty of her friends about the number of pets they have.  The median number of pets is two.

Median=2

By the definition of median of data set, the median two tells that the middle value of the pet is 2 when arranged in high to low point.

Thus, the statement which median describe about Grace's data set is 2 is the middle number when the number of pets in data set is arranged from least to greatest.

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25% of the students in the seminar are shorter than 65 inches.

To find the percentage of students who are shorter than 65 inches, we first need to find the number of students whose height is less than 65 inches:

There are three students who are shorter than 65 inches: 62, 60, and 58.

Therefore, the percentage of students who are shorter than 65 inches is:

(3 students / 12 students) × 100% = 25%

Note that the value given for 1% × 5 does not appear to be relevant to this question, and is not necessary for the calculation of the percentage of students who are shorter than 65 inches.

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Answer:

Guessing at least one incorrect answer

Step-by-step explanation:

The complement of guessing 5 correct answers on a 5-question true/false exam is-

Guessing at least one incorrect answer because, when 1 or more questions are incorrectly guessed, the event of 5 correct answers can not occur.

Answer:

SEE GOGLE

Step-by-step explanation:

Answer:

26.12%

Step-by-step explanation:

R1500 + R347 = R1847 (Total cost price)

Profit = Selling price - Total Cost Price

         = R2500 - R1847

Profit = R653

%Profit = (653/2500) x 100

           = 26.12%

Answer: 69

Step-by-step explanation:

duhhhhhhhhhhhh

Answer:

(A) x(3+5)  is an expression. The rest are equations.

Step-by-step explanation:

Answer:

1  3/50

Step-by-step explanation:

the .06 is in the hundreths place so it would be 6/100 or 3/50

now add the whole number to it to get 1 3/50

By adding the set of parentheses as shown above, we get an expression \(65 e^{0.68} \simeq 17.09\)

In mathematics, exponentiation is an operation involving two numbers, the base and the exponent or power. Exponentiation is written as bⁿ, where b is the base and n is the power; this is pronounced as "b to the n".

One possible way to create an expression using parentheses to get a value of 17 is:

((8 ÷ 2) + (9 × 9) - (10 × 2)) exponent 0.5

First, we evaluate the multiplication and division operations inside parentheses, since they have higher precedence than addition and subtraction.

\(((8 \div 2) + (9 \times 9) - (10 \times 2)) = (4 + 81 - 20) = 65\)

Then, we raise the result to the power of 0.68 which is the same as taking the square root:

65 exponent 0.68 ≈ 17.09

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A 98% confidence interval to estimate the proportion of all such items that are defective is A . ( 0.012 , 0.058 ) .

Given :

Of 346 items tested, 12 are found to be defective. Construct a 98% confidence interval to estimate the proportion of all such items that are defective.

Middle = 0.02 / 2

= 0.01

At 98 % z score ;

z = -2.33

z* = 2.33

CI = p ± z \(\sqrt{p ( 1 - p) / n}\)

= 12 / 346 + 2.33 * \(\sqrt{12/346 * 334/346 / 346}\)

= 0.347 ± 0.229

= 0.347 - 0.229 to 0.347 + 0.229

= 0.118 to 0.576

≈ 0.012 to 0.058

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Answer:

Option B

Step-by-step explanation:

Answered by Gauthmath

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