Help mee pls :((
\( {7}^{th} grade\)
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Gabriella skied for 6 hours, Let x be the number of hours that Gabriella skied. We know that she paid $35 for ski rental and $15 per hour for skiing,

for a total of $95. We can set up the following equation to represent this information:

35 + 15x = 95

Solving for x, we get:

15x = 60

x = 4

Therefore, Gabriella skied for 6 hours.

Here is a more detailed explanation of how to solve the equation:

Subtract $35 from both sides of the equation.

15x = 60

15x - 35 = 60 - 35

15x = 25

Divide both sides of the equation by 15.

15x = 25

x = 25 / 15

x = 4

Therefore, x is equal to 4, which is the number of hours that Gabriella skied.

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Answer:

Cumulative Frequency:

The sum of all the frequencies for all classes is equal to the number of elements in the given data and that summation is termed as the cumulative frequency which defines the number of entries of that statistical data.

The sum of relative frequencies is also equal to one, since the sum of all fractional parts must equal the whole.

Step-by-step explanation:

Answer:

7.9ft

Step-by-step explanation:

Cos44 x 11

= 7.912737804

≈ 7.9 ft

Feel free to mark this as brainliest

Answer:

infinite

Step-by-step explanation:

it results in 10-10x=10-10x if you simplify

can also be simplified more into x=x

but we already know x has to equal x.

Answer:

y=-8/5x+4

Step-by-step explanation:

The slope of perpendicular lines is the opposite reciprocal of the original equation.

To get the opposite reciprocal, flip the fraction and use the opposite sign.

Here, the slope is -8/5 because that is the opposite of 5/8.

To get the equation of the line, use point-slope and then distribute to get the equation in y=mx+b format.

Point slope: y-y1=m(x-x1). Use the coordinate (5,-4) in the equation.

y+4=-8/5(x-5)

Multiply (x-5) by -8/5 and simplify.

y+4=-8/5x+8

y=-8/5x+4

Thus, standard error for this sample of tissue cells infected in a laboratory treatment is 5.33.

The standard error (SE) is a measure of how much the sample mean deviates from the population mean. It is calculated as the standard deviation of the sample divided by the square root of the sample size.

In this case, the sample size is 225, the standard deviation is 80, and the mean is 350. Therefore, the standard error can be calculated as follows:

SE = 80 / √(225)
SE = 80 / 15
SE = 5.33

The standard error for this sample of tissue cells infected in a laboratory treatment is 5.33. This means that the sample mean of 350 is likely to be within 5.33 units of the population mean.

The smaller the standard error, the more precise the estimate of the population mean. In this case, the standard error is relatively small compared to the standard deviation, which suggests that the sample mean is a relatively accurate estimate of the population mean.

However, it is important to note that the standard error only provides information about the precision of the estimate, not its accuracy. Other factors, such as sampling bias or measurement error, could still affect the accuracy of the estimate.

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Answer:

-2x + 2y = -8

Step-by-step explanation:

2y=2x-8

y=x-4

0=x-4

x=4

Hopefully this helps :) Let me know if you need me to explain it better.

Answer:

-2 x + 2 y = -8

Step-by-step explanation:

radikool

Answer:

average speed for walking = 4.5 km/h

average speed for cycling = 23.2 km/h

A vector quantity is a quantity that has both magnitude and direction and can be represented by a directed line segment. Using the information in the question, the vector represented is found as (−3, 8, −1).

To find the vector represented by the directed line segment with initial point a(1, −4, 3) and terminal point b(−2, 4, 2), we need to subtract the coordinates of the initial point from the coordinates of the terminal point. This will give us the components of the vector in the form (x, y, z).
The directed line segment can be represented as a vector from a to b as follows:
vector AB = OB - OA,
where OA is the position vector of the initial point a and OB is the position vector of the terminal point b.
OA = (1, −4, 3) and OB = (−2, 4, 2)
So, vector AB = OB − OA
Vector AB = (Bx - Ax, By - Ay, Bz - Az)
By plugging the coordinates of points A and B into the formula, we get:
Vector AB = (-2, 4, 2) - (-1, 4, 3)
Vector AB = (−2 − 1, 4 − (−4), 2 − 3)
Vector AB = (−3, 8, −1)
Therefore, the vector represented by the directed line segment with initial point a(1, −4, 3) and terminal point b(−2, 4, 2) is (−3, 8, −1).

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(10x-3=15x-18)

X = -1

Hey there!

\(Answer:\boxed{x=-1}\)

\(Explanation:\)

10x - 3 = -5x - 18

10x - 3 + 5x = -5x - 18 + 5x      Add 5x to both sides

15 - 3 = -18

15x - 3 + 3 = -18 + 3    Add 3 to both sides

15x = -15

15x/15 = -15/15

x = -1

Hope this helps!

The volume of the candle is approximately 94 cubic inches.

A circular cylinder is a three-dimensional solid object made up of two parallel and congruent circular bases and a curving surface connecting the bases.

The volume of a right circular cylinder is given by the formula:

V = πr²h

Where

Substituting the given values into the formula, we get:

V = 3.14 x 2² x 7.5

V = 3.14 x 4 x 7.5

V = 94.2

Rounding to the nearest cubic inch, we get:

V ≈ 94 cubic inches

Therefore, the volume of the candle is approximately 94 cubic inches.

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The expressions without hyperbolic functions are as follows:

(a) sinh(0) = 0,

(b) cosh(0) = 1,

(c) tanh(0) = 0,

(d) sinh(1) = \((e^{(1)} - e^{(-1)})/2\), and

(e) tanh(1) = \((e^{(1)} - e^{(-1)})/(e^{(1)} + e^{(-1)})\).

The hyperbolic functions sinh(x), cosh(x), and tanh(x) can be defined in terms of exponential functions. We can use these definitions to express the given expressions without hyperbolic functions.

(a) sinh(0) = \((e^{(0)} - e^{(-0)})/2\) = (1 - 1)/2 = 0

(b) cosh(0) = \((e^{(0)} + e^{(-0)})/2\) = (1 + 1)/2 = 1

(c) tanh(0) = \((e^{(0)} - e^{(-0)})/(e^{(0)} + e^{(-0)})\) = (1 - 1)/(1 + 1) = 0

(d) sinh(1) = \((e^{(1)} - e^{(-1)})/2\)

(e) tanh(1) = \((e^{(1)} - e^{(-1)})/(e^{(1)} + e^{(-1)})\)

For expressions (d) and (e), we can leave them in this form as the exact values involve exponential functions. If you want an approximate decimal value, you can use a calculator to evaluate the expression.

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Answer:

3rd one and 4 th

Step-by-step explanation: just look at them its clearly easy

Answer:

here u go

Step-by-step explanation:

pls mark me as brainlist

thx

Answer:

this is your answer hope this helps you

1.  x² - 5x - 16 can be written as (x - 8)(x + 2).

2. 6an² - 3b²n² = n²(6a - 3b²).

3. This expression represents a perfect square trinomial, which can be factored as (2x - y)².

4. Combining like terms, we get -n³ - n² + n + 1 = -(n³ + n² - n - 1).

5. 17x³y⁴z⁶ = (x²y²z³)².

6. 12a²b³ = (2a)(6b³) = 12a6b³ = 12a⁷b³x⁶.

Let's simplify the given expressions:

Simplifying x² - 5x - 16:

To factorize this quadratic expression, we look for two numbers whose product is equal to -16 and whose sum is equal to -5. The numbers are -8 and 2.

Therefore, x² - 5x - 16 can be written as (x - 8)(x + 2).

Simplifying 6an² - 3b²n²:

To simplify this expression, we can factor out the common term n² from both terms:

6an² - 3b²n² = n²(6a - 3b²).

Simplifying 4x² - 4xy + y²:

This expression represents a perfect square trinomial, which can be factored as (2x - y)².

Simplifying n + 1 - n³ - n²:

Rearranging the terms, we have -n³ - n² + n + 1.

Combining like terms, we get -n³ - n² + n + 1 = -(n³ + n² - n - 1).

Simplifying 17x³y⁴z⁶:

To simplify this expression, we can divide each exponent by 2 to simplify it as much as possible:

17x³y⁴z⁶ = (x²y²z³)².

Simplifying 12a²b³:

To simplify this expression, we can multiply the exponents of a and b with the given expression:

12a²b³ = (2a)(6b³) = 12a6b³ = 12a⁷b³x⁶.

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The investment will double in nine years at an interest rate of approximately 8.09% compounded annually.

To find the value of the (P/A,8%,145) factor, we can use the general formula for the present worth of an annuity:

(P/A, i%, n) = (1 - (1 + i)^(-n)) / i

Substituting the values given:

i = 8%

n = 145

(P/A,8%,145) = (1 - (1 + 0.08)^(-145)) / 0.08

Using a financial calculator or spreadsheet software, we can calculate the value of (P/A,8%,145) as follows:

(P/A,8%,145) ≈ 43.7276 (rounded to four decimal places)

Therefore, the correct choice for the value of (P/A,8%,145) is:

C. (P/A,8%,145) = (P/A,8%,100)(P/A,8%,45) ≈ 43.7276 (rounded to four decimal places)

Regarding the second question, to find the interest rate at which an investment will double in nine years, we can use the future worth factor formula:

(F/P, i%, n) = (1 + i)^n

We want the investment to double, so we have:

(1 + i)^9 = 2

Taking the ninth root of both sides:

1 + i = 2^(1/9)

Solving for i:

i ≈ 0.0809 or 8.09% (rounded to two decimal places)

Therefore, the investment will double in nine years at an interest rate of approximately 8.09% compounded annually.

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The formula that will return the correlation coefficient between data in cells A1:A5 and B11:B35 is =CORREL(A1:A5, B11:B35).

The correlation coefficient is a statistical measure that quantifies the relationship between two variables. It ranges from -1 to 1, where a value of -1 indicates a perfect negative correlation, 1 indicates a perfect positive correlation, and 0 indicates no correlation.

To calculate the correlation coefficient using the CORREL function, we need to provide the two sets of data as arguments. In this case, the data in cells A1:A5 represents one set of values, and the data in cells B11:B35 represents another set of values.

The formula =CORREL(A1:A5, B11:B35) takes these two sets of data as input. It computes the correlation coefficient between the values in cells A1:A5 and B11:B35, considering each pair of corresponding values.

By using the CORREL function with the appropriate range of cells, we can obtain the correlation coefficient between the two sets of data. The resulting value will give us insights into the strength and direction of the relationship between the variables represented by the data.

It is worth noting that the CORREL function assumes a linear relationship between the variables. If the relationship is nonlinear, the correlation coefficient may not fully capture the nature of the association. Therefore, it is important to interpret the correlation coefficient in conjunction with other relevant information and consider the context of the data.

In summary, to calculate the correlation coefficient between data in cells A1:A5 and B11:B35, the formula =CORREL(A1:A5, B11:B35) should be used. This formula provides a measure of the linear relationship between the two sets of data and helps us understand the strength and direction of the association.

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Answer:

(- 5, 1 )

Step-by-step explanation:

under a clockwise rotation about the origin of 90°

a point (x, y ) → (y, - x ) , then

H (- 1, - 5 ) → H' (- 5, - (- 1) ) → H' (- 5, 1 )

The Probability of drawing a three given that the card is not a face card is 1/9.

In summary:

- P(face card | queen) = 1/13

- P(three | not a face card) = 1/9

The probabilities, we need to consider the total number of favorable outcomes and divide it by the total number of possible outcomes.

1. P(face card | queen):

A face card is a jack, queen, or king. There are four queens in a standard deck of 52 cards. So the total number of favorable outcomes is 4 (there are four queens in the deck). The total number of possible outcomes is 52 (the total number of cards in the deck).

P(face card | queen) = Number of favorable outcomes / Total number of possible outcomes

                    = 4/52

                    = 1/13

Therefore, the probability of drawing a face card given that the card is a queen is 1/13.

2. P(three | not a face card):

A face card is a jack, queen, or king. So not a face card includes all the other cards in the deck except for jacks, queens, and kings. There are 12 cards of each suit, and there are four suits in a deck. So the total number of not face cards is (12-3) * 4 = 9 * 4 = 36.

The total number of favorable outcomes is the number of threes in the deck, which is four.

P(three | not a face card) = Number of favorable outcomes / Total number of possible outcomes

                         = 4/36

                         = 1/9

Therefore, the probability of drawing a three given that the card is not a face card is 1/9.

In summary:

- P(face card | queen) = 1/13

- P(three | not a face card) = 1/9

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The least number of miles she would have to drive per year to make leasing no more expensive than purchasing is 48500 miles.

Given:

She can lease a car for $420 per month (on an annual basis). Under this plan, the cost per mile (gas and oil) is $0.06. If she were to purchase the car, the fixed annual expense would be $4700, and other costs would amount to $0. 08 per mile.

Let x be the least miles.

420 * 12 + 0.06x < > 4700 + 0.08x

multiply by 100 on both sides.

504000+6x < > 470000+8x

97000 < > 2x

48500=x

Therefore the least number of miles she would have to drive per year to make leasing no more expensive than purchasing is 48500 miles.

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Step-by-step explanation:

Answer: The item is $42 off.

Step-by-step explanation:

Whenever you have a percentage of a number you simply turn the percentage into a fraction by dividing it by 100. Here 60% would become 0.6. Then you multiply the regular price of $70 by 0.6 to get 60 percent of 70 which is 42. That means that $42 is discounted from the original.

The value of the expression is -44 and thus does not depend on the value of x

An algebraic expression can be described as a mathematical expression made up of variables, terms, factors, coefficients and constants.

They are also made up of mathematical or arithmetic operations, which includes;

From the information given, we have that;

(x-5)(x+8)-(x+4)(x-1)

expand the bracket

x² + 8x - 5x - 40 - (x² -x + 4x - 4)

x² + 8x - 5x - 40 - x² + x - 4x + 4

collect like terms

3x - 3x - 40 - 4

add or subtract like terms

0 - 44

Hence, the expression does not depend o x

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Answer:  see attachments

Step-by-step explanation:

Slope-Intercept format is: y = mx + b    

                                                 ↓      ↓

                                                 ↓      Intercept (where it crosses the y-axis)

                                                Slope (rise over run)

Answer: 81.49% of bottle of mixed fruit juice is NOT apple juice.

Step-by-step explanation:

Quantity of mixed fruit juice  = 6.65 ounces

Quantity of apple juice in it = 1.231 ounce

Quantity of mixed fruit juice is NOT apple juice = (6.65-1.231) ounces

= 5.419 ounces

Fraction of bottle is not apple juice = \(\dfrac{5.419}{6.65}\approx0.8149=81.49\%\)

Hence, 81.49% of bottle of mixed fruit juice is NOT apple juice.

The z-score for x = 61.6 is 2.45.

This means that this data point is 2.45 standard deviations above the sample mean.

'

The z-score is a measure of how many standard deviations a data point is from the mean. It is calculated using the formula:

z = (x - μ) / σ

Where x is the data point, μ is the sample mean, and σ is the sample standard deviation.

In this case, x = 61.6, μ = 52.3, and σ = 3.8. Plugging these values into the formula gives:

z = (61.6 - 52.3) / 3.8

z = 9.3 / 3.8

z = 2.447

Rounding to two decimal places gives a z-score of 2.45.

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The length of the microorganism that measure 5μm is equivalent to 0.005 mm

It is the transformation of a value expressed in one unit of measurement into an equivalent value expressed in another unit of measurement of the same nature.

To solve this problem the we have to convert the units with the given information.

1mm is equal to 1000 μm

5μm * (1 mm/1000μm) = (5*1) / 1000 = 5/1000 = 0.005 mm = 5x10^-3 mm

The length of the microorganism that measure 5μm is equivalent to 0.005 mm

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Answer:

3/4

Step-by-step explanation:

1 1/2 can be expressed as an improper fraction 3/2

hence

1 1/2 ÷ 2

= 3/2 ÷ 2

= 3/2 x 1/2

= 3/4

Answer:

The second one, (x+1)(3x+2)

The answer is (x+1)(3x+2)

hope it helps

Answer:

$121

Step-by-step explanation:

First fin 10% of 110

11

then add that to 110

121

Answer:

$11

Step-by-step explanation: