Solve for x

6x + 3 - 1/2 x = -2x +5

Answer:64 %

Step-by-step explanation:

Given if it rains John Plays piano is 0.8

i.e. if it rains probability that john will not play is 0.2

If it not rain Then probability that john will play piano is 0.4

he will not play is 0.6

Given if there is 60 % chance that it will rain tomorrow  

Thus Pobability that john will play is

[tex]=Probability\ that\ it\ will \times Probability\ john\ will\ play+Probability\ it\ will\ not\ rain\times Probability john will play[/tex]

[tex]=0.6\times 0.8+0.4\times 0.4=0.48+0.16=0.64[/tex]

Answer: Complete factorization would be  

[tex]5(x^2+6x+10)[/tex]

Step-by-step explanation:

Since we have given that  

[tex]5x^2+30x+50[/tex]

We need to find the factors:

Since the terms of above expression is a factor of 5.

So, it becomes,

[tex]5x^2+30x+50\\\\=5(x^2+6x+10)[/tex]

Hence, complete factorization would be  

[tex]5(x^2+6x+10)[/tex]

Answer:

3

Step-by-step explanation:

i have done this test before

The vertex of the function f(x) = 5x²+ 10x + 8 and indicate Minimum at (-1, 3)

To find the vertex of the function f(x) = 5x² + 10x + 8 using the completing-the-square method, follow these steps:

Step 1: Write the function in the form (ax² + bx + c).

f(x) = 5x² + 10x + 8

Step 2: Identify the coefficient of x² and divide it by 2. This gives us (b/2a).

In this case, a = 5, b = 10, so (b/2a) = 10 / (2 * 5) = 1.

Step 3: Square the result from Step 2 [(b/2a)²].

(1)² = 1.

Step 4: Add and subtract the result from Step 3 to the function inside the parentheses.

f(x) = 5x² + 10x + 1 - 1 + 8

Step 5: Group the terms.

f(x) = (5x² + 10x + 1 - 1) + 8

Step 6: Factor the quadratic expression inside the parentheses and simplify.

f(x) = 5(x² + 2x + 1) + -5 + 8

f(x) = 5(x + 1)² + 3

Now the function is in the form f(x) = a(x - h)² + k, where (h, k) represents the vertex of the parabola.

Comparing the function with this standard form, we can see that the vertex is at (-1, 3). The value of 'h' represents the x-coordinate of the vertex, and 'k' represents the y-coordinate of the vertex.

Therefore, the correct answer is:

Minimum at (−1, 3)

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Answer:

C

Step-by-step explanation:

am going to assume you know how to calculate standard deviation, as it is long and tedious to type up. If you really don't understand how to calculate them, I will explain it. The standard deviation is larger in data set 1 than 2, because the spread is larger. The larger the spread, the larger the deviation of the numbers in the set are from the mean (average) number. The standard deviation in 1 is greatest. 2 is in the middle, and 3 is the lowest standard deviation. Hope this helps, good luck.

Answer:

Larger the standard deviation larger the spread present in data.

Step-by-step explanation:

Standard Deviation is the square root of sum of square of the distance of observation from the mean.

[tex]Standard deviation(\sigma) = \sqrt{\frac{1}{n}\sum_{i=1}^{n}{(x_{i}-\bar{x})^{2}}}[/tex]

where, [tex]\bar{x}[/tex] is mean of the distribution.

It  is used to measure dispersion (spread) of the data. Larger the standard deviation larger the dispersion (spread) present in data.

The Standard deviation of 1st data set is 39.53

The Standard deviation of 2nd data set is 15.81

The Standard deviation of 3rd data set is 7.91

Hence,

(Spread of 1st data set) > (Spread of 2nd data set) > (Spread of 3rd data set)

Answer:

For trapezoids, we have some rules:

The angles always need to ad up to 360°

We also have that the base angles are suplementary, so they need to ad to 180°. (one smaller or equal than 90° and the other greater or equal than 90°)

Then, if the angles are one equal to 60° and the other 45°.

The other two angles are:

a1 = 180° - 60° = 120°

a2 = 180° - 45° = 135°

and now we have: 120° + 60° + 45° + 135° = 360°

for the other we have an angle of 60° and other of 120°.

This two angles can be one next to the other, so may be suplementary.

this mens that the other two angles may be any angles that add to 180° (again, one is less or equal than 90° and the other is greater or equal than 90°)

So we can have:

a1 = 110°

a2 = 70°

for example.

Answer:  The correct option is

(B) $122.08.

Step-by-step explanation:  Given that Ira bought a tennis racquet that cost $112 and the sales tax rate is 9 percent.

We are to find the total amount that Ira paid.

The total amount Ira paid is the sum of the cost price and the sales tax.

The sales tax paid by Ira is given by

[tex]S_t=9\%\times 112=\dfrac{9}{100}\times112=\dfrac{1008}{100}=10.08.[/tex]

Therefore, the total amount paid by Ira will be

[tex]A_p=112+S_t=112+10.08=122.08.[/tex]

Thus, the total amount paid by Ira is $122.08.

Option (B) is CORRECT.

Answer:

The correct option is

(B) $122.08.

Step-by-step explanation:

Plzz visit my profile and help me with my questions.

Answer:

125

Step-by-step explanation:

Answer:

The best prediction for the number of times a 4 will be drawn from the pile is:

                        125

Step-by-step explanation:

It is given that:

A set of cards contains cards numbered 1 – 8.

So, the theoretical probability that 4 comes up is:

Ratio of Number of favorable outcome( outcome of 4) to the total umber outcome(i.e. 8 )

Hence, Theoretical Probability that 4 is drawn=1/8

Now, out of 1000 trials the best prediction of number of times 4 is drawn is:

(The probability of drawing 4)×(Number of experiments or trials)  

=(1/8)×1000

=125

Answer:

The discriminant is 0.

Step-by-step explanation:

Since, the discriminant of a quadratic equation [tex]ax^2+bx+c=0[/tex] is,

[tex]D=b^2-4ac[/tex]

Here, the given equation is,

[tex]4x^2+16x+16=0[/tex]

By comparing,

a = 4, b = 16 and c = 16,

Hence, the discriminant of the given equation is,

[tex]16^2-4\times 4\times 16[/tex]

[tex]=256 - 256[/tex]

[tex]=0[/tex]

To solve this linear differential equation, we can use the method of characteristic equation. The general solution is y = (c1 + c2x + c3x^2)e^(2x), where c1, c2, and c3 are constants.

To solve this linear differential equation, we can use the method of characteristic equation. Let's assume that the solution is of the form y = e^(rx). Substituting this in the given equation, we get the characteristic equation as r^3 - 6r^2 + 12r - 8 = 0. This can be factored as (r - 2)^3 = 0. So, the characteristic roots are r = 2, 2, and 2.

Since we have repeated roots, the general solution is given by y = (c1 + c2x + c3x^2)e^(2x), where c1, c2, and c3 are constants.

Therefore, the general solution to the linear differential equation y''' - 6y'' + 12y' - 8y = 0 is y = (c1 + c2x + c3x^2)e^(2x), where c1, c2, and c3 are constants.

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Since the variance is the square of the standard deviation, the variance here is 6.3.

In statistics, the variance shows how much the values spread out around the mean. The standard deviation is obtained as the square root of the variance of a given value.

Now;

[tex]s = \sqrt{v}[/tex]

s = 2.5

[tex]v = s^2[/tex]

[tex]s = (2.5)^2 =[/tex]6.3

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Answer:

Plane Z

Step-by-step explanation:

Ann could pick from 1800 different 4-digit numbers that are multiples of 5, considering the range of possible digits for each position and the requirement that it must be a multiple of 5.

To determine how many different 4-digit numbers that are multiples of 5 Ann could pick, we need to consider three things:

The first digit can be anything from 1 to 9 (since the number cannot start with zero).

The second and third digits can be anything from 0 to 9.

The fourth digit must be either 0 or 5 (since the number is a multiple of 5).

For each of the first three digits, we have 9 possible choices (1-9 for the first digit, 0-9 for both the second and third digits), and for the last digit, we have 2 possible choices (0 or 5). Using the counting principle, we multiply the number of choices for each digit together to find the total number of possible 4-digit multiples of 5 Ann can pick:

9 (first digit) × 10 (second digit) × 10 (third digit) × 2 (fourth digit) = 1800 different 4-digit multiples of 5.

So, Ann could pick from 1800 different 4-digit numbers that are multiples of 5.

Answer:

Step-by-step explanation:

The correct answer is the number of minutes the students studied. The student's grades is dependent on how long they studied. The domain is the independent variable or the amount of time.

Final answer:

The domain in a scatterplot of study time versus test grades represents all the reported study times of the students. It is visualized by plotting this data on a dot plot or analyzing the distribution to see the correlation between study time and grades.

Explanation:

The domain of a function in mathematics represents the set of all possible input values it can accept, typically the x-values on a graph. In the context of a scatterplot of time studying versus test grades created by a math teacher, the domain would consist of the various amounts of time that students reported studying. Analyzing the distribution of these values can showcase how study time correlates to test performance, assuming that this is a function with a one-to-one correspondence between study time and grade received, passing the vertical-line test.

To create a dot plot, as suggested in a collaborative classroom exercise, you would align a number line with the possible amounts of study time and place a dot above the corresponding value for each student's reported study time. Through this process, you could visualize the amount of study time on the x-axis and gain insights into the study habits of the class.

In a given scenario like the one described for Ms. Phan studying for an economics exam, the total benefit and the expected total gain in her score could be plotted to visualize the marginal benefits of additional study hours. This helps to understand the concept of diminishing returns in relation to study time and test score improvement.

The Cold War was a prolonged period of geopolitical tension between the United States and the Soviet Union, involving an arms race, proxy wars, and a race for technological superiority, but avoiding direct military conflict due to the threat of nuclear annihilation.

The two superpowers that engaged in the Cold War were the United States and the Soviet Union. The Cold War was a period of geopolitical tension between these two countries that began shortly after the end of World War II and lasted until the collapse of the USSR in 1991. This era was characterized by political and ideological conflicts that were expressed through proxy wars, the arms race, propaganda, and competition in technological advancements such as the space race.

While it was called a 'war', the Cold War did not result in direct military conflict between the two nations. Instead, the struggle for global supremacy was played out through indirect means, including support for opposing sides in regional conflicts such as the Korean War, the Vietnam War, and the Soviet-Afghan War. The fear of Mutually Assured Destruction (M.A.D.) due to both nations possessing extensive nuclear arsenals was a deterrent against a 'hot' war.

The Cold War impacted almost every aspect of international relations and domestic policies within the superpower nations and their allies, with each side attempting to limit the influence and spread of the other's ideology. The United States followed a policy of containment to prevent the spread of communism, and the Soviet Union tried to expand its socialist model and create a buffer zone against the West.

Answer:

b

Step-by-step explanation: