Can anyone help me with this Algebra 2 question? Soon as possible!

Solve the system of equations


3x + 7y = 19

x + y = 5

Answer:

you have to "convert" the one to be set up the same as 3/10:

you subtract fractions, by having a common denominator and then subtracting the numerators.

10/10 -3/10 = 7/10

Step-by-step explanation:

i hope this helped :)

Approximately 40% of the scores on the standardized exam are greater than a score of 412.5

To find the score for which approximately 40% of the scores are greater, using the z-distribution table, follow these steps:

1. Identify the given values: mean (µ) = 400, standard deviation (σ) = 50, and the area to the right of the z-score (40% or 0.40).

2. Find the corresponding area to the left (1 - 0.40 = 0.60 or 60%).

3. Look up the z-score in the z-distribution table that corresponds to an area of 0.60 to the left. You will find a z-score of approximately 0.25.

4. Use the z-score formula to find the corresponding score (x):
  x = µ + (z × σ) = 400 + (0.25 × 50) = 400 + 12.5 = 412.5

Therefore, approximately 40% of the scores on the standardized exam are greater than a score of 412.5.

To know more about z-distribution table refer here :

https://brainly.com/question/28951428#

#SPJ11

Answer:

27 is 30% of what number?

D. 90

Step-by-step explanation:

You're welcome.

Answer:

The height of the candle after 23 hours is 20.4 centimeters

Step-by-step explanation:

Mathematical Modeling

To model a real-life situation, a mathematical model can be built in such a way it accurately represents the variables measured in the system.

This problem requires to build a model for the height of a candle as a linear function of the time it has been burning. If the time is expressed in hours and the height is in centimeters, then the linear function can be written as:

\(H(t)=mt+b\)

Where m and b are constants we need to find. We are provided two points of reference: After 15 hours of burning, the candle has a height of 22 centimeters. This is the point (15,22).

We also know after 27 hours of burning, the height is 19.6 cm. This is the point (27,19.6). This data is enough to accurately define the function. Let's substitute the first point:

\(22=15m+b\qquad\qquad [1]\)

Substituting the second point:

\(19.6=27m+b\qquad\qquad [2]\)

Subtracting [1] - [2]:

\(22-19.6=15m-27m\)

\(\Rightarrow 12m=-2.4\)

Solving for m:

\(m=-2.4/12=-0.2\)

Using this value in [1]:

\(22=15(-0.2)+b\)

\(22=-3+b\)

Solving for b:

b=25

The function is now complete:

\(H(t)=-0.2t+25\)

Finally, substitute t=23:

\(H(23)=-0.2(23)+25=20.4\)

The height of the candle after 23 hours is 20.4 centimeters

Step-by-step explanation:

i think question is not complete.

Answer:

False!

Step-by-step explanation:

See picture for examples.

Answer:

\(x=\dfrac{\sqrt6 \sqrt 2}{2}\)

Step-by-step explanation:

We need to find the value of x.

Here, Hypotenuse = √6

Perpendicular = x

We know that,

\(\sin\theta=\dfrac{P}{H}\)

So,

\(\sin(45)=\dfrac{x}{\sqrt6}\\\\x=\sin(45)\times \sqrt{6} \\\\x=\dfrac{\sqrt{6}}{\sqrt{2} }\\\\x=\dfrac{\sqrt{6}}{\sqrt{2} }\times \dfrac{\sqrt2}{\sqrt2}\\\\x=\dfrac{\sqrt6 \times \sqrt 2}{2}\\\\x=\dfrac{\sqrt6 \sqrt 2}{2}\)

So, the value of x is equal to \(\dfrac{\sqrt6 \sqrt 2}{2}\).

Answer:

A.2x+6

B.60x-20

C.8x+4

D.6x-24y

Answer:

n = ^1/2

Step-by-step explanation:

z^1/2 = √z

1/2 as an exponent means square root

Given :

A Caterer Charges $275 for a 3 hour event  and $425 for a 5 hour event.

To Find :

The rate of change for this situation.

Solution :

Price per hour ratio for 3 hour event :

\(R_1= \dfrac{275}{3}\)

Price per hour ratio for 5 hour event :

\(R_2= \dfrac{425}{5}\)

Now, change in ratio :

\(R = R_1-R_2\\\\R = \dfrac{275}{3}-\dfrac{425}{5}\\\\R = \dfrac{100}{15}\\\\R = \dfrac{20}{3}\)

Therefore, rate of change for this situation is \(\dfrac{20}{3}\) .

Hence, this is the required solution.

Answer:

5859375

Step-by-step explanation:

We can write the geometric sequence as \(a_n=3(5)^{n-1}\) and use that to find the 10th term:

\(a_n=3(5)^{n-1}\)

\(a_{10}=3(5)^{10-1}\)

\(a_{10}=3(5)^{9}\)

\(a_{10}=3(1953125)\)

\(a_{10}=5859375\)

Therefore, the 10th term of the geometric sequence is 5859375

Answer:

The hospital is stuffy and the air has an undertone of bleach. the walls are magnolia and are scraped in places from the hundreds of trolleys. that have bumped into them. The picture in the wall are cheap benign prints of uplifting scenes and above the double doors are large blue plastic signs with the areas of hospital lie ahead.I was comig through the two doors to see my grandpa and he was bareley alive then I walked with him back through the blue doors with the sam stuffy feeling after I walked through then as we approached the surgery room he miraculously recovered and walked away and no knows how it happened. Too this day the hospital employees wonder how this had happened

The probability that a randomly selected point on AK will be on CD is given as follows:

2/10 = 0.2 = 20%.

The parameters that are needed to calculate a probability are listed as follows:

Then the probability is calculated as the division of the number of desired outcomes by the number of total outcomes.

The length of AK is given as follows:

10 - (-10) = 20 units.

The length of CD is given as follows:

-4 - (-6) = 2 units.

Hence the probability is given as follows:

2/10 = 0.2 = 20%.

Learn more about the concept of probability at https://brainly.com/question/24756209

#SPJ1

Answer:

20 os the ans hope it helps. pls mark me brain list :D

Answer:

x=18

Step-by-step explanation:

y²+y²=(9√(2))²

2y²=81*2

y²=162/2

y²=81

y=9

hypotenuse: 2y=x   2*9=18

x=18

Answer:

6.00

6.75

Step-by-step explanation:

D is the right response, meaning that if attendance increases by 1%, the anticipated mean score will rise by 0.341 percentage points.

What is Statistics?

The study of gathering, analysing, interpreting, presenting, and arranging data in a certain way is the focus of the mathematic branch known as statistics. The act of gathering data, classifying it, presenting it in a way that makes it understandable, and then conducting additional analyses of the data is known as statistics. Statistics is also the process of drawing inferences from samples of data gathered through experiments or surveys. Statistics are also used to operate in a variety of fields, including psychology, sociology, geology, probability, and more.

Results of an EXA are a dependent variable.

Percentage Attendance is a standalone factor.

As a result, the regession equation is Scores received = 39.390 + 0.341*X.

In other words, if we increase attendance by 1%, the estimated mean score received will increase by 0.341 percentage, according to the slope of the regression line.

Therefore, D is the right response, meaning that if attendance increases by 1%, the anticipated mean score will rise by 0.341 percentage points.

To know more about Statistics checkout https://brainly.com/question/29093686

#SPJ1

Answer:

1 /a −b

Step-by-step explanation:

Answer: 4, -1, [see if you can figure it out]

Step-by-step explanation:

To compute the correlation coefficient for log-transformed variables, numerical values are required. However, as the numerical values for the variables are not provided, it is not possible to calculate the correlation coefficient and determine the exact answer.

The correlation coefficient measures the strength and direction of the linear relationship between two variables. It ranges from -1 to +1, with values close to -1 indicating a strong negative linear relationship, values close to +1 indicating a strong positive linear relationship, and a value of 0 indicating no linear relationship.

To compute the correlation coefficient, numerical values of the variables are needed. Additionally, log transformation can be applied to the variables if necessary. However, without the actual numerical values, it is not possible to calculate the correlation coefficient accurately.

Software tools such as statistical software packages (e.g., R, Python with libraries like NumPy or Pandas, SPSS, etc.) can be used to compute the correlation coefficient. These tools provide functions or methods specifically designed for calculating the correlation coefficient. However, they require the input of actual numerical data to produce accurate results.

In this case, since the numerical values for the variables are not provided, it is not possible to determine the exact value of the correlation coefficient. The answer choices given (-0.800, 0.44, -0.44, 0.80) represent possible values of the correlation coefficient, but without the specific data, it is impossible to determine which value is correct.

Learn more about Correlation Coefficient here:

brainly.com/question/29978658

#SPJ11

There are a total of 1,326 different ways to draw two cards from a standard 52-card deck, with the first card being a diamond and the second card being a king.

The formula for this type of problem is given by the combination formula, which is expressed as C(n,r). In this case, we want to determine the number of combinations of two cards from a standard 52-card deck, with the first card being a diamond and the second card being a king. Therefore, n = 52 and r = 2.

Using the combination formula, we can calculate the number of ways to draw two cards such that the first card is a diamond and the second card is a king as follows: C(52,2) = 1326. This means that there are a total of 1,326 different ways to draw two cards from a standard 52-card deck, with the first card being a diamond and the second card being a king.

Learn more about combinations here:

https://brainly.com/question/20211959

#SPJ4

Answer:

C. Paid $2.60 too much

Step-by-step explanation:

Gas 12 x 2.89 = 34.68

granola 2 x 1.59 = 3.18 x 1.075 = 3.4185

apple .89 x 1.075 = 0.95675

vitamin water 2 x 1.39 = 2.78 x 1.075 = 2.9885

  34.68
  3.4185
  0.95675
+ 2.9885
---------------------
  $42.04

  $44.64
- $42.04
---------------------
  $2.60

Pascal's triangle can be used to expand the binomial (d-3)^6. The expansion involves applying the binomial theorem and using the coefficients from the corresponding row of Pascal's triangle.

In this case, the sixth row of Pascal's triangle is 1 6 15 20 15 6 1, which represents the coefficients for each term in the expansion of (d-3)^6.

The binomial theorem states that for any binomial expression (a+b)^n, the expansion can be represented as the sum of terms of form C(n, k) * a^(n-k) * b^k, where C(n, k) is the binomial coefficient obtained from Pascal's triangle.

In this case, we have (d-3)^6, so the expansion will have seven terms corresponding to the powers of d from 6 to 0. Using the coefficients from the sixth row of Pascal's triangle, we can write the expanded form as:

(d-3)^6 = 1d^6 + 6d^5*(-3) + 15d^4(-3)^2 + 20d^3(-3)^3 + 15d^2(-3)^4 + 6d(-3)^5 + 1*(-3)^6.

Simplifying the terms and raising -3 to different powers, we can obtain the expanded form of (d-3)^6.

Learn more about Pascal’s triangles here: brainly.com/question/29549939

#SPJ11

The probability that a randomly selected airfare between these two cities will be more than $450 is 0.2033.

Given:

Mean (μ) = $387.20

Standard deviation (σ) = $68.50

To find the probability that a randomly selected airfare between Philadelphia and Los Angeles will be more than $450,

calculate the area under the normal distribution curve above the value of $450.

Step 1: Standardize the value of $450.

To standardize the value, we calculate the z-score using the formula:

z = (X - μ) / σ

z = ($450 - $387.20) / $68.50

z= 0.916

So, the area to the right of the z-score approximately equals 0.2033.

Therefore, the probability that a randomly selected airfare between these two cities will be more than $450 is 0.2033.

Learn more about Probability here:

https://brainly.com/question/28146696

#SPJ4

The question attached here seems to be incomplete, the complete question is:

Suppose the round-trip airfare between Philadelphia and Los Angeles a month before the departure date follows the normal probability distribution with a mean of $387.20 and a standard deviation of $68.50. What is the probability that a randomly selected airfare between these two cities will be more than $450?

0.0788

0.1796

0.2033

0.3669

Answer:

653

Step-by-step explanation:

The surface area of the larger cube is

2(10 x 7) + 2(12x7) + 2(10x12) = 140 + 168 + 240 = 548

The surface area of the smaller cube (minus the surface that is covered by the other figure)

4(8x3) + 1(3x3) = 96 + 9 = 105

105 + 548 = 653

Answer:

It is 653 cm

Step-by-step explanation:

Answer:

12a^9b^7

Step-by-step explanation:

Answer

12a^9b^7

Step-by-step explanation:

4x3=12

add the indices

3+6=9

2+5=7

12a^9b^7