18 POINTS will rate brainiest 6th grade math

Answer:

The variance is  \(\sigma ^2 =25\)

Step-by-step explanation:

From the question we are told that

    The sample size is  n =  21

     The sum of squares is \(SS = 500\)

Generally the variance is mathematically represented as

           \(\sigma ^2 = \frac{SS}{n- 1}\)

substituting values

          \(\sigma ^2 = \frac{ 500}{21- 1}\)

          \(\sigma ^2 =25\)

The Relative Maximum will be (7, 50) and minimum is (12, 0).

We have the graph showing average low temperatures in international falls minnesota.

From the graph the maximum y coordinate is 50.

So, the Relative Maximum will be (7, 50).

and, the minimum y coordinate is 0.

So, the Relative minimum is (12, 0)

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Answer:

3.5

Step-by-step explanation:

you do .70 times 5

P times 5 = p(5)

P=.70

.70 times 5= 3.5

The value of P(5) when p = 0.70 is 0.00567

The given parameter is:

p = 0.70

A geometric probability is represented as:

P(x) = (1 - p)^(x - 1) * p

So, we have:

P(5) = (1 - 0.70)^(5 - 1) * 0.70

Evaluate the difference

P(5) = 0.30^4 * 0.70

Evaluate the product

P(5) = 0.00567

Hence, the value of P(5) when p = 0.70 is 0.00567

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Answer:

x=2 is the answer to this problem

Answer:

C

Step-by-step explanation:

From clodest to warmest temperature

-6.1 < -2.5 < -0.4 < 3.4

Answer: x = 2

Step-by-step explanation:

x + (x + 1) + (x + 2) = 9

3x + 3 = 9

3x +(3 - 3) = (9 - 3)

3x = 6

x = 2.

Hope this helps

Answer:

x =  \(\frac{4}{5}\)

Step-by-step explanation:

2x - 3y = 7 → (1)

- 4x + y = - 5 → (2)

multiplying (2) by 3 and adding to (1) will eliminate y

- 12x + 3y = - 15 → (3)

add (1) and (3) term by term to eliminate y

- 10x + 0 = - 8

- 10x = - 8 ( divide both sides by - 10 )

x = \(\frac{-8}{-10}\) = \(\frac{4}{5}\) (= 0.8 )

Answer:

D) 9

Step-by-step explanation:

x = ½ × 13 = 6.5

y = ½ × 5 = 2.5

6.5 + 2.5 = 9

So the length of PC is 9

HOPE THIS HELPS AND HAVE A NICE DAY <3

Answer:

1st question :55%

2nd ":122.22%

3rd ":81.82%

Answer:

you can make 12 cans of them

Answer:

THIS DESERVES A BRAINLIEST BECAUSE I PUT ALL OF THE ANSWERS AND THE WORK TO IT

1: 6

2: 3

3: 5

4: 1

5: 3

6: -1

7: 8

8: 4

9: 3

10: 16

Step-by-step explanation:

Use PEMDAS

1. (2x2)+2

You do 2x2 first which is 4 so then you do 4+2 which is 6

2. 6 divided by (5-3)

You do 5-3 first which is 2 then 6/2 (that's 6 divided by 2) which is 3

3. 6/6 x5

so you do 6 divided by 6 which is 1 then you get 1x5 which is 5.

4. 2-(5-4)

5-4 is 1 and 2-1 is 1

5. 2+6/6

6 divided by 6 is 1 and 2+1 is 3

6. (-6)+5 is -1

7.  1-(-7) is the same as 1+7 which is 8

8. (-3)-7 is the same as -3+7 which is the same as 7-3 which is 4

9. 5+(-2) is the same as 5-2 which is 3

10. 8-(-8) is the same as 8+8 which is 16

Point of  y-intercept is (0,1)

In a graph, the point where the line or curve crosses the axis is called the intercept. If a point crosses the x-axis it is x-intercepts. If a point crosses y-axis it is y-intercepts.

Given the function is \(y=2.5^{x}\)

y-intercept is the point where the graph of the function crosses the y-axis.

To find the point of y-intercept put x=0 in the given function, we get

if x=0  then \(y=2.5^{0}\) ⇒ y=1.

The function crosses at the point 1 in the  y-axis.

Hence, point of  y-intercept is (0,1)

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To solve the savings plan balance, we have to calculate the interest for 19 months. The formula for calculating interest for compound interest is given below:$$A = P \left(1 + \frac{r}{n} \right)^{nt}$$where A is the amount, P is the principal, r is the rate of interest, t is the time period and n is the number of times interest compounded in a year.

The given interest rate is 11% per annum, which will be converted into monthly rate and then used in the above formula. Therefore, the monthly rate is $r = \frac{11\%}{12} = 0.0091667$.

The monthly payment is $PMT = $250. We need to find out the amount after 19 months. Therefore, we will use the formula of annuity.

$$A = PMT \frac{(1+r)^t - 1}{r}$$where t is the number of months of the plan and PMT is the monthly payment. Putting all the values in the above equation, we get:

$$A = 250 \times \frac{(1 + 0.0091667)^{19} - 1}{0.0091667}$$$$\Rightarrow

A = 250 \times \frac{1.0091667^{19} - 1}{0.0091667}$$$$\Rightarrow

A =250 \times 14.398$$$$\Rightarrow A = 3599.99$$

Therefore, the savings plan balance after 19 months with an APR of 11% and monthly payments of $250 is $3599.99 (approx).

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The translation of the sentence 'The sum of 15 and Delia’s age is 65'

is 15 + d = 65.

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

Let, The age of Delia be 'd'.

Therefore, The equation for the statement 'The sum of 15 and Delia’s age is 65'  can be expressed as,'

15 + d = 65.

d = 65 - 15.

d = 50.

So, The age of Delia is 50 years.

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Answer:

B (1, -3)

Step-by-step explanation:

Step 1:  Use the midpoint formula to find the coordinates of the endpoint:

Normally, we find the midpoint of a segment using the midpoint formula, which is given by:

M = (x1 + x2) / 2, (y1 + y2) / 2, where

Since we're solving for the coordinates of an endpoint, we can allow (-5, 7) to be our (x1, y1) point and plug in (-2, 2) for M to find (x2, y2), the coordinates of the endpoint B:

x-coordinate of B:

x-coordinate of midpoint = (x1 + x2) / 2

(-2 = (-5 + x2) / 2) * 2

(-4 = -5 + x2) + 5

1 = x2

Thus, the x-coordinate of the endpoint B is 1.

y-coordinate of B:

y-coordinate of midpoint = (y1 + y2) / 2

(2 = (7 + x2) / 2) * 2

(4 = 7 + x2) -7

-3 = y2

Thus, the y-coordinate of the endpoint B is -3.

Thus, the coordinates of the endpoint B are (1, -3).

Answer:

5a-5b

Step-by-step explanation:

hope this helps :))

Answer:

If zero is added to any number, then the answer will always be equal to the initial number.

9514 1404 393

Answer:

Step-by-step explanation:

5(t +2h) --- the group total is 5 times the individual total. Each bought one ticket and 2 hot dogs.

__

5t +10h --- the group total is the total spent for tickets plus the total spent for hot dogs. 5 tickets and 10 hot dogs were purchased by the group.

Answer:

Hello,

in order to simplify, i have taken the inverses functions

Step-by-step explanation:

\(\int\limits^\frac{1}{2} _{-1} {(-2x^2-x+1)} \, dx \\\\=[\frac{-2x^3}{3} -\frac{x^2}{2} +x]^\frac{1}{2} _{-1}\\\\\\=\dfrac{-2-3+12}{24} -\dfrac{-5}{6} \\\\\boxed{=\dfrac{9}{8} =1.25}\\\)

Answer:

D

Step-by-step explanation:

2.2 : x = 4.1 : 12.3

2.2/x = 4.1/12.3 = 1/3

so x = 2.2 * 3 = 6.6

D

For the function f(x) = 7/8x² - 14, the x-intercepts are x = -4 and x = 4.

What is a function?

In mathematics, a function is a unique arrangement of the inputs (also referred to as the domain) and their outputs (sometimes referred to as the codomain), where each input has exactly one output and the output can be linked to its input.

To find the x-intercepts of the function f(x), we need to solve the equation f(x) = 0.

f(x) = 7/8x² - 14

Substitute f(x) with 0 -

0 = 7/8x² - 14

Add 14 to both sides -

7/8x² = 14

Multiply both sides by 8/7 -

x² = 16

Take the square root of both sides -

x = ±4

Therefore, the x-intercepts of the function f(x) are x = -4 and x = 4.

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Answer:

(4,-22)

Hope this helps!

The subsets of the set {e, n, t} are given as follows:

{{}, {e}, {n}, {t}, {e,n}, {e,t}, {n,t}, {e,n,t}}.

Considering a set with n elements, the number of subsets in the set is the nth power of 2, that is:

\(2^n\)

The set for this problem is given as follows:

{e, n, t}

The cardinality is given as follows:

n = 3.

Hence the number of subsets is given as follows:

2³ = 8.

The subsets are given as follows:

{{}, {e}, {n}, {t}, {e,n}, {e,t}, {n,t}, {e,n,t}}.

In which {} is the empty set.

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Step-by-step explanation:

the question of your answer is d

Answer:

Step-by-step explanation:

The equivalent decimal and mixed number for given letter C is,

⇒ C = 8.2 ; 8 2/10

We have to given that,

A number line is shown in image.

Since,

A number lines are the horizontal straight lines in which the integers are placed in equal intervals.

And, All the numbers in a sequence can be represented in a number line. This line extends indefinitely at both ends.

Now, By given number line,

Point C is two point left from point 8.

Hence, The point C is denoted as,

⇒ C = 8.2

⇒ C = 82/10

⇒ C = 8 2/10

Therefore, the equivalent decimal and mixed number for given letter C is,

⇒ C = 8.2 ; 8 2/10

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Answer:

infinitely many solutions

Step-by-step explanation:

solve  by substitution:

solve equation 1 for y: - y = 7 - 4x; divide by -1 to simplify into y = -7 + 4x

Substitute - 7 + 4x into the second equation to obtain:

3(-7 + 4x) - 12x = -21, which yields:

-21 + 12x - 12x = -21, which simplifies 0 = 0

a result of 0 = 0 means infinite solutions such as:

(2,1), (3, 5), (4, 9), (5, 13), (6, 17)....

Answer:

infinite soulutions

Step-by-step explanation:

i just did it and it was right on ed2021...

The amount of money in Marianna's annuity after 6 years will be approximately $300,516.

To calculate the amount of money in Marianna's annuity after 6 years, we can use the formula for compound interest on an annuity:

A = P * ((1 + r/n)^(n*t) - 1) / (r/n)

Where:

A = the final amount in the annuity

P = the regular contribution (each quarter) = $10,000

r = annual interest rate = 8% = 0.08

n = number of compounding periods per year = 4 (since it's compounded quarterly)

t = number of years = 6

Plugging in the values:

A = 10000 * ((1 + 0.08/4)^(4*6) - 1) / (0.08/4)

Calculating this expression:

A ≈ 10000 * ((1.02)^24 - 1) / 0.02

A ≈ 10000 * (1.601032449136241 - 1) / 0.02

A ≈ 10000 * 0.601032449136241 / 0.02

A ≈ 10000 * 30.05162245681205

A ≈ 300,516.22

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Answer:

304200

Step-by-step explanation:

To find the value of P6, use the savings annuity formula

PN=d((1+r/k)N k−1)r/k.

From the question, we know that r=0.08, d=$10,000, k=4 compounding periods per year, and N=6 years. Substitute these values into the formula gives

P6=$10,000 ((1+0.08/4)6⋅4−1)/(0.08/4).

Simplifying further gives P6=$10,000 ((1.02)24−1)/(0.02) and thus P6=$304,218.62.

Rounding as requested, our answer is 304200.

The correct answer is John's weekly salary is $240 based on his hourly pay rate and the number of hours worked.

Let's choose the function "Weekly salary is a function of the hourly pay rate and the number of hours worked."Example: John works as a part-time employee at a grocery store. His hourly pay rate is $12, and he worked for 20 hours in a week. We can evaluate the function to find his weekly salary.

Weekly salary = Hourly pay rate * Number of hours worked

Weekly salary = $12/hour * 20 hours

Weekly salary = $240

So, John's weekly salary is $240 based on his hourly pay rate and the number of hours worked.

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