i have a very hard question,

what is 1+2

please help asap

Answer:

I believe that the value of the exprexpression is 80.

Step-by-step explanation:

Substitute 7 for every y variable.

y^2 + 4y + 3=

7^2 + 4(7) + 3=

49 + 28 + 3=

80

Answer:

5.6ft squared

Step-by-step explanation:

4x7 = 28 divided by 5 which is 5.6

Answer:

  2x -16

Step-by-step explanation:

The area of each rectangle is the product of its length and width. The shaded area is the difference between the areas of the outside rectangle and the inside rectangle.

  shaded area = (2x -1)(x +6) -(2x +5)(x +2)

  = (2x^2 +11x -6) -(2x^2 +9x +10)

  = (2 -2)x^2 +(11 -9)x +(-6 -10)

  = 2x -16 . . . . . area of the shaded region

If the distribution is skewed right, the mean is greater than the median.

A distribution is said to be skewed right if more than half the area under the distribution curve is to the right of the mode of the distribution. Also the tail of the distribution will be longer on the right side. In this case, the distribution is said to be positively skewed.

Then the mean of the distribution will be greater than the median of the distribution.

i.e., mean > median

Likewise, the distribution is said to skewed left if more than half of the area under the distribution curve is on the left side.

Also if a distribution is not skewed, then it is said to be symmetric.

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Answer:

Look at image

Step-by-step explanation:

Answer:

240 students

Step-by-step explanation:

     To find the minimum number of students, we have to find the LCM of 10, 12, 16

10 = 2 * 5

12 = 2 * 2 * 3

16 = 2 * 2 * 2 * 2

LCM = 2 * 2 *  2 * 2 * 3 * 5

       = 240

Answer:

102

Step-by-step explanation:

On quadrilateral ABCD it shows BC = 20 and CD = 30

20+30 = 50

on quadrilateral A'B'C'D'

it says B'A' = 22

and D'A' = 32

22+32 = 52

52+50 = 102

Answer:

55units

Step-by-step explanation:

Answer:

The chance will be the same (4/7)

Step-by-step explanation:

Old bag

p(blue)=4/7

New bag

p(blue)=8/14=4/7

The chance will be the same (4/7) since both the red and the blue marbles are doubled at the same time implying that the ration of red to blue still remails the same.

I hope the explanation is clear. If so rate brainliest please

The common statistical method of expressing the precision of a series of repetitive measurements is the standard deviation.

It should be noted that the standard deviation is the measure of how dispersed the data is in relation to the mean.

It should be noted low standard deviation implies that data are clustered around the mean, and high standard deviation means data are more spread out.

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Answer:

113

Step-by-step explanation:

it's the x outside right?

Answer:

dont have options but the cube root of 27 is 3.

Hope this helps plz hit the crown :D

Answer:

80%

Step-by-step explanation:

According to the question we have the solution of the  given differential equation initial value problem is: g(x) = (3/4)x^4 - x + 9/4 .

To solve the given initial value problem, we need to integrate both sides of the differential equation. We have:

g'(x) = 3x(x^2 - 1/3)

Integrating both sides with respect to x, we get:

g(x) = ∫[3x(x^2 - 1/3)] dx

g(x) = ∫[3x^3 - 1] dx

g(x) = (3/4)x^4 - x + C

where C is the constant of integration.

To find the value of C, we use the initial condition g(1) = 2. Substituting x = 1 and g(x) = 2 in the above equation, we get:

2 = (3/4)1^4 - 1 + C

2 = 3/4 - 1 + C

C = 9/4

Therefore, the solution of the given initial value problem is:

g(x) = (3/4)x^4 - x + 9/4

In more than 100 words, we can say that the given initial value problem is a first-order differential equation, which can be solved by integrating both sides of the equation. The resulting function is a family of solutions that contain a constant of integration. To find the specific solution that satisfies the initial condition, we use the given value of g(1) = 2 to determine the constant of integration. The resulting solution is unique and satisfies the given differential equation as well as the initial condition.

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Answer:

The option D represents an interval with a positive average rate of change.

Step-by-step explanation:

Let \(f(x) = x^{2}+10\), the average rate of change on the interval \([a,b]\) is represented by the definition of the secant line:

\(\bar f = \frac{f(b) -f(a)}{b-a}\) (1)

Where:

\(a\), \(b\) - Lower and upper bounds, dimensionless.

\(f(a)\), \(f(b)\) - Function evaluated at lower and upper bounds, dimensionless.

Now we proceed to check each option:

A. \(a = -3\), \(b = 3\)

\(\bar f = \frac{19-19}{3-(-3)}\)

\(\bar f = 0\)

B. \(a = -4\), \(b = -1\)

\(\bar f = \frac{11-26}{(-1)-(-4)}\)

\(\bar f = -5\)

C. \(a = -3\), \(b = 1\)

\(\bar f = \frac{11-19}{1-(-3)}\)

\(\bar f = -2\)

D. \(a = -1\). \(b = 2\)

\(\bar f = \frac{14-11}{2-(-1)}\)

\(\bar f = 1\)

The option D represents an interval with a positive average rate of change.

Answer:

It would be D

Step-by-step explanation:

The probability that the total time taken to serve both customers will be less than 4 minutes is 0.89435 or about 89.4%, assuming that the time taken to serve the two customers are independent and identically distributed.

In order to find the probability that the total time taken to serve both customers will be less than 4 minutes, we need to first find the distribution of the sum of two normal distributions.

We can assume that the time taken to serve the two customers are independent and identically distributed (iid). Thus, the distribution of the sum of the two normal distributions will be normal with mean equal to the sum of the means and variance equal to the sum of the variances.

Let X1 be the time taken to serve the first customer and X2 be the time taken to serve the second customer.

Then, we have:

X1 ~ N (1.5, 0.4²) and X2 ~ N (1.5, 0.4²).

Let Y = X1 + X2. Then, Y ~ N (3, 0.4² + 0.4²) = N (3, 0.8²).

Now, we need to find P (Y < 4). Using the standard normal distribution, we can standardize Y as follows:

Z = (Y - μ) / σ,

where μ = 3 and σ = 0.8.

Thus, Z = (4 - 3) / 0.8 = 1.25.

Using a standard normal distribution table or calculator, we can find

P (Z < 1.25) = 0.89435.

Therefore, the probability that the total time taken to serve both customers will be less than 4 minutes is 0.89435 or about 89.4%.

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Answer:

3

Step-by-step explanation:

Answer:

44 because it goes into both of the numbers twice without going over

Step-by-step explanation:

Hope this helps and i am 100% sure it is correct if you are having doubts. Brainliest please

Answer: (1,2)

Step-by-step explanation:

1)

x+y=3

y=-x+3

x | 0 | 3 |

y | 3 | 0 |

2)

3x+y=5

y=-3x+5

x | 0 | 2 |

y | 5 | -1 |

The given power series is: Σ [(-1)^n * (x-4)²ⁿ * (2n)!] To determine the center of the power series, look at the term (x-4) in the expression. The power series is centered at the value that makes this term equal to zero. (x-4) = 0 Solving for x:

x = 4

So, the power series is centered at x = 4

A more detailed explanation of the answer.

The power series is given as:

∑n=0∞(−1)n(x−4)2n(2n)! .

To state where the power series is centered, we can look at the formula for a power series:

∑n=0∞an(x−c)n,

where a is a constant and c is the center of the power series. Comparing this formula to the given power series, we can see that the center is c = 4. Therefore, the power series is centered at x = 4.

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The statement "Quadrilaterals A and B are both squares" does not provide enough information to determine whether A and B are scale copies of one another.

To determine if two quadrilaterals are scale copies of each other, we need to compare their corresponding sides and angles. If the corresponding sides of two quadrilaterals are proportional and their corresponding angles are congruent, then they are scale copies of each other.

In this case, since both A and B are squares, we know that all of their angles are right angles (90 degrees). However, we do not have any information about the lengths of their sides. Without knowing the lengths of the sides of A and B, we cannot determine if they are scale copies of each other.

Therefore, the statement cannot be determined as true or false based on the given information.

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Ryan will have to make a monthly payment of $195.41

By using the concept of confidence interval, it can be concluded that-

To reduce confidence interval, it is needed to increase sample size.

Option c is correct

What is confidence interval?

Suppose there is an unknown parameter whose range of estimate is required. Confidence interval gives the range of estimate of this unknown parameter.

Formula for percentage confidence interval

\(\bar{x} \pm z_\frac{\alpha}{2} \times \frac{\sigma}{\sqrt{n}}\)

We have to reduce the size of the confidence interval

Confidence interval has no effect on  mean, directly proportional to  standard deviation and inversely proportional to sample size

So to reduce confidence interval, it is needed to increase sample size.

Option c is correct

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Complete Question

After constructing a confidence interval estimate for a population mean, you believe that the interval is useless because it is too wide. in order to correct this problem, you need to:

Select one:

a. increase the population standard deviation

b. increase the level of confidence

c. increase the sample size

d. increase the sample mean

e. none of these would help

Answer:

The x intercept is (-15/4 ,0)

Step-by-step explanation:

To find the x intercept, set y = 0 and solve for x

y = 4x+15

0 = 4x+15

subtract 15 from each side

-15 = 4x+15-15

-15 = 4x

Divide by 4

-15/4 = 4x/4

-15/4 = x

The x intercept is (-15/4 ,0)

To find the domain and range of the function C = 200 - 7x + 0.345x^2, we need to consider the values that x can take and the corresponding values of C.

The domain of the function represents the set of all possible input values for x. In this case, since x represents the number of units, it should be a non-negative quantity. Therefore, the domain of the function is all real numbers greater than or equal to zero.

The range of the function represents the set of all possible output values for C. We can observe that the coefficient of the x^2 term is positive, which means that as x increases, the value of C will also increase. However, since the function is quadratic, it will have a maximum or minimum point. By analyzing the quadratic equation, we can determine that the parabola opens upward, indicating that the minimum value of C is attained when x is at its vertex. Thus, the range of the function is all real numbers greater than or equal to the minimum value of C at the vertex.

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Answer:

16.5

Step-by-step explanation:

8.25 × 2 = 16.5

............

to graph the inequality y ≥ -1/4x - 3, we can first graph the boundary line y = -1/4x - 3

How to solve graph?

To graph the inequality y ≥ -1/4x - 3, we can follow the following steps:

Step 1: Start by graphing the boundary line y = -1/4x - 3. To do this, we can first find two points on the line. We can choose x = 0 and x = 4 as two convenient values, and then solve for the corresponding y-values. When x = 0, y = -3, and when x = 4, y = -4. We can plot these two points and draw a straight line passing through them to obtain the boundary line.

Step 2: Choose a test point that is not on the boundary line. We can choose the origin (0, 0) as a test point.

Step 3: Substitute the test point into the inequality y ≥ -1/4x - 3. If the inequality is true for the test point, shade the region containing the test point. Otherwise, shade the region that does not contain the test point.

When we substitute the origin into the inequality, we get y ≥ -3. This means that all the points above the boundary line (including the boundary line itself) satisfy the inequality. Therefore, we shade the region above the boundary line.

The resulting graph should look like the shaded region above the boundary line y = -1/4x - 3, as shown below:

Graph of y ≥ -1/4x - 3

In summary, to graph the inequality y ≥ -1/4x - 3, we can first graph the boundary line y = -1/4x - 3 and then shade the region above the line to represent all the points that satisfy the inequality.

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Answer:

7

Step-by-step explanation:

The formula for the area of a parallelogram is the same formula to get the area of a rectangle. In a rectangle, the height is the area divided by base. Therefore, the height of the parallelogram would simply be the area divided by base.

The probability of having one girl and one boy when a person has two children is 50%.

If we know that the person has a boy, the probability of the second child also being a boy is still 50%. The gender of the first child does not affect the probability of the second child's gender.

If we know that the older child is a boy, the probability of the younger child also being a boy is still 50%.

Again, the gender of the older child does not affect the probability of the younger child's gender.

Probability of having one girl and one boy:

Since the gender of each child is independent and has a 50% probability, the probability of having one girl and one boy can be calculated by multiplying the probability of having a girl (0.5) with the probability of having a boy (0.5). Therefore, the probability is 0.5 * 0.5 = 0.25 or 25%.

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Answer:

\( {x}^{x} (1 + log(x)) \)

I hope this helps you.