6th grade problem i need help

Answer:

BC = 6

Step-by-step explanation:

since BD = CD then Δ BCD is isosceles.

the line a through D is a perpendicular bisector of BC, then

BX = CX = 3 , so

BC = BX + CX = 3 + 3 = 6

The hypothesis are given as follows:

H0: p = 0.301; H1: p ≠ 0.301.

a) The level of significance is of 0.05.

b) The sampling distribution is given by: The standard normal, since np > 5 and nq > 5.

The test statistic is of: z = -2.09.

c) The p-value is of: 0.0366.

At the null hypothesis, it is tested if there is not enough evidence to conclude that the proportion has changed, hence:

[tex]H_0: p = 0.301[/tex]

At the alternative hypothesis, it is tested if there is enough evidence to conclude that the proportion has changed, hence:

[tex]H_1: p \neq 0.301[/tex]

The test statistic is given by the equation presented as follows:

[tex]z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}[/tex]

The parameters of the equation are listed as follows:

The values of these parameters for this test are:

[tex]\overline{p} = \frac{52}{220} = 0.2364, p = 0.301, n = 220[/tex]

Hence the value of the test statistic is of:

[tex]z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}[/tex]

[tex]z = \frac{0.2364 - 0.301}{\sqrt{\frac{0.301(0.699)}{220}}}[/tex]

z = -2.09.

We have a two-tailed test, as we are testing if the proportion is different of a value.

Hence, using a z-distribution calculator, with z = -2.09, the p-value is of 0.0366.

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Work Shown:

4x + 13 ≥ 27

4x + 13-13 ≥ 27-13

4x ≥ 14

4x/4 ≥ 14/4

x ≥ 7/2

The inequality sign stays the same for each step. The inequality sign only flips if we were to multiply both sides by a negative number (or divide both sides by a negative number).

Note: 7/2 = 3.5

Answer:a, c and d

Step-by-step explanation:bc i got it right on edge

For given function  f(x) = 7/(x² - 5),

f(a + 4) = 7/(a² + 8x + 11)

In this question we have been given a function f(x) = 7/(x² - 5)

We need to evaluate f(a + 4)

Substitute x = a + 4 in given function.

f(a + 4)

= 7/((a + 4)² - 5)

=  7/(a² + 8x + 16 - 5)

=  7/(a² + 8x + 11)

Therefore, for given function  f(x) = 7/(x² - 5),

f(a + 4) = 7/(a² + 8x + 11)

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In total there will be 397 dots after 100 minutes.

What do you mean by airthmetic sequences?

Arithmetic sequences are sequences of the form:

a, a+d, a+2d, a+3d, a+4d, …

a is the first term and d is the common difference

series. The n terms of the arithmetic progression are given by

[tex]a_{n}[/tex]  = a + (n - 1)d

The number d is called the common difference

Arithmetic progressions differ by d and any terms [tex]a_{n}[/tex] and [tex]a_{n-1}[/tex]

d = [tex]a_{n}-a_{n-1}[/tex] -  

According to the given pattern, in the first figure, number of dots is 1 , in the second figure, number of dots become 5 , similarly in the next the count is 9 and 14

So, the sequence become

1,5,9,14......

here first term , a = 1

common difference , d = 5-1 = 4

We need to find the number of dots after 100 minutes

So, here n = 100

We need to find [tex]a_{100}[/tex]

[tex]a_{100}[/tex] = a + (100 - 1) d = 1 + 99(4) = 1 + 396 = 397

Therefore, in total there will be 397 dots after 100 minutes.

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Answer:

Step-by-step explanation:

By using the concept  of inequality, the correct options are

2nd, 4th and 5th option

What is linear inequation?

Inequation shows the comparision between two algebraic expressions by connecting the two algebraic expressions by [tex]> , < . \geq, \leq[/tex]

A one degree inequation is known as linear inequation.

Here,

The given inequation is

[tex]\frac{-2}{3}n \leq 16[/tex]

Now,

[tex]\frac{-2}{3}n \leq 16\\n \geq -16 \times \frac{3}{2}\\n \geq -24\\[/tex]

Since n is greater than or equal to 24, the arrow will point towards right

The circle will be closed as there is an equality

So the correct options are 2nd, 4th and 5th option

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Complete Question

The complete question has been attached here

Upon graphing of the function rule h = 8 - 0.4j, we see that the graph is continuous.

We are given the function as; h = 8 - 0.4j

Let h represent the height in inches on the y-axis and let j represent the amount of juice in ounces on the x-axis.

We are told that the height of the juice in a 20-oz bottle depends on the amount of juice. This means that j is an independent variable and h is dependent variable.

The function  represents the height of juice after drinking j ounces of juice. Therefore as the juice is being drank, the height of the juice in bottle will change continuously. Therefore, the graph of our given function will be continuous because we can drink fractions of an ounce juice.

The equation of a line in slope-intercept form is given as;

y = mx + b

where;

m is Slope of line

b is y-intercept

If we rewrite our function slope-intercept form of equation, we will get;

h = -0.4j + 8

Thus;

Slope = -0.3

y-intercept = 8.

The graph is as plotted in the attached file

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The point (-6,6) is in the solution region of the inequality and is plotted in given below graph.

Given,

Equation -> y > x - 3 +8

                    y > x + 5

Lets take a point A(-6,6)

Putting the value in equation,

6 > -6 + 5

6 > -1

which is true.

Hence, A(-6,6) lies in the region of the inequality.

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The number of 2 points and 5 points are 30 and 8 respectively.

Let the number of 5 points = x

Let the number of 2 points = x + 22

It was also stated that the test is worth 100 points and that each problem is worth either 2 points or 5 points.

This will be:

5x + 2(x + 22) = 100

5x + 2x + 44 = 100

7x + 44 =

Collect like terms

7x = 100 - 44

7x = 56

Divide

x 56 / 7

x = 8

Number of 5 points = 8

Number of 2 points = x + 22 = 8 + 22 = 30

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Answer:

Step-by-step explanation:

Swap sides so that all variable terms are on the left hand side. This changes the sign direction.

Subtract 7 from both sides.

Subtract -7 from −3 to get −10.

Divide both sides by −2. Since −2 is negative, the inequality direction is changed.

Divide −10 by −2 to get 5.

Answer:

x=7

Step-by-step explanation:

these 2 triangle sides are equal to each other so just set them equal to find x

X+3=3x-11

-x.  -x

3=2x-11

+11. +11

14=2x

=2. =2

7=x

Hopes this helps please mark brainliest

See attachment, this took me a while so please say thanks and rate <3

Answer:

y=2x-22

Step-by-step explanation:

lets make the equation into slope intercept form

-2x+y=-8 let's move the -2x to the other side we get

y=2x-8

now let's create our equation with the points given

to create the equation you want to make it point slope form with the point given

y-0=2(x-11) distribute the 2 and we can remove the 0

y=2x-22

Answer: 2.333333...

Step-by-step explanation:

If we apply rise over run, we see that it rises 3.5 spaces, and runs 1.5, which means that   [tex]m = \frac{rise}{run} = \frac{3.5}{1.5} = 2.33333...[/tex]

Answer:

It's an example of the distributive property

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

The change in Shamar's bank account after 7 months is

x - 98.

Where x is the amount in the account initially.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

Amount in the account = x

Amount deducted every month = $14

The change in the account after 7 months.

= x - 7 x 14

= x - 98

Thus,

The change in Shamar's bank account after 7 months is

x - 98.

Where x is the amount in the account initially.

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Answer:

3/12 or 40%

not 10000% sure on this tho

The value of 2/5 divided by 8/15 is 3/4

A fraction can be defined as the he or portion of a whole set or element

There are different types of fractions, which includes;

Some examples include;

Simple fractions; 1/ 2, 1/3

Proper fractions; 1/ 4, 2/ 3

Improper fractions; 3/ 2, 5/3

Mixed fractions; 2 1/ 6

We have that;

2/ 5 ÷ 8/15

Take inverse of divisor and multiply

2/ 5 × 15/ 8

Divide through

3/4

Hence, the value is 3/4

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Answer:

answer,(2)x≥-1

Step-by-step explanation:

it was right

Answer:

Step-by-step explanation:

Answer: y=-2x-5

Check this in desmos

The Perimeter of triangle CED  is 57 in.

What is a parallelogram?

A parallelogram is the name given to a quadrilateral in geometry. In a parallelogram, the opposing sides are parallel and of equal length. The rhombus, rectangle, and square are just a few shapes that are parallelograms.

Having two sets of parallel sides makes a quadrilateral a parallelogram. A parallelogram has opposite sides that are the same length and angles that are the same size. Additionally, the internal angles on the same transverse side are supplementary. 360 degrees are equal to the total of all internal angles.

Two parallel pairs of sides make up a parallelogram, a quadrilateral. Four right angles form a parallelogram called a rectangle.

Rhombus: An equal-length parallelogram with four sides.

The diagonals of a parallelogram bisect each other AC = 2 CE

Substitute AC= 34 into AC = 2CE =34 = 2CE

Calculate 34 = 2 CE=>  CE = 17

The diagonals of a parallelogram bisect each other BD = 2DE

Substitute BD= 28 into BD = 2DE =>  28 = 2DE

Calculate 28 = 2DE  => DE = 14

Opposite sides of parallelogram are congruent AB = CD

Substitute AB = 26 into AB = CD =>  CD = 26

Perimeter of a triangle PΔCDE = CE + CD + DE

Substitute  CE = 17, DE = 14, CD = 26.

PΔCDE = CE + CD + DE

PΔCDE = 17+ 26 + 14

PΔCDE = 57 in

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Answer:

n * 21 = m * 18       one runs n laps and one runs m laps to again be together at the same place

7 n = 6 m        divide by 3

one runs 7 * 18 = 126 min

the other runs 6 * 21 = 126 min

After 126 min they will be together at the start

Using the system of equations and use the elimination method the two numbers are 82 and 48.

What is the elimination method?

To create an equation in one variable using the elimination approach, you can either add or subtract the equations. To eliminate a variable, add the equations when the coefficients of one variable are in opposition, and subtract the equations when the coefficients of one variable are equal.

Here, we

let the first number = x

let the second number = y

according to the given conditions:

x + y = 130 ........(1)

x - y = 34 .........(2)

Using the elimination method we add both equations (1) and (2) and we get

2x = 164

x = 164/2 = 82

Now, we substitute the value of x in eq (1) and we get

82 + y = 130

y = 130-82

y = 48

Hence, using the system of equations and use the elimination method the two numbers are 82 and 48.

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Answer:

S=3/8 miles

T=1/4 hour

V=S/T = 3/8 ÷ 1/4 = (3×4)÷8 = 3/2 miles in an hour