It is claimed that an automobile is driven on the average more than 20,000 kilometers per year. To this claim, a random sample of 20 automobile owners is asked to keep a record of the kilometers they travel. Would you agree with the claim if the random sample showed an average of 23,500 kilometers and standard deviation of 3900 kilometers? Use alpha = 5%.

Answer:

r+2.75=3÷0.5

r+2.75=6

r=6-2.75=3.25

Answer:

3.25

Step-by-step explanation:

It's the answer on Khan

Answer:

[tex]h=1/3[/tex]

Step-by-step explanation:

So we have the equation:

[tex]-12h+4=0[/tex]

Subtract 4 from both sides:

[tex](-12h+4)-4=(0)-4\\-12h=-4[/tex]

Divide both sides by -12:

[tex](-12h)/-12=(-4)/-12\\h=-4/-12[/tex]

Simplify and reduce:

[tex]h=1/3[/tex]

Answer:

h =1/3

Step-by-step explanation:

[tex]-12h + 4 = 0\\\\\mathrm{Subtract\:}4\mathrm{\:from\:both\:sides}\\-12h+4-4=0-4\\\\\mathrm{Simplify}\\-12h=-4\\\\\mathrm{Divide\:both\:sides\:by\:}-12\\\frac{-12h}{-12}=\frac{-4}{-12}\\\\Simplify\\h=\frac{1}{3}[/tex]

Answer:

x is equal to six

Step-by-step explanation:

4 × 6 = 24

Answer: There is only one step to this equation. We will use inverse operations to isolate the x by dividing 4 on both sides. (4 is being multiplied by x, and the opposite of multiplication is division.)

4x/4 = x

24/4 = 6

The equation now looks like:

x = 6

x is equal to 6, so this is your answer.

Answer:

x=9

Step-by-step explanation:

3x-2=25

Add 2 to each side

3x-2+2=25+2

3x = 27

Divide by 3

3x/3 = 27/3

x = 9

Answer:

x=9

Step-by-step explanation:

3x-2=25

3x =25+2

3x =27

x =27/3

x =9

Answer:

d. 0

Step-by-step explanation:

Given that:

A rational number is multiplied by a irrational number.

And the result is a rational number.

To find:

Such rational number wil be:

a. [tex]\frac{1}2[/tex]

b. 1

c. [tex]\frac{1}{10 }[/tex]

d. 0

Solution:

Let us consider the given options one by one.

Let the irrational number be = [tex]\pi[/tex]

Checking option a.

Multiply [tex]\pi[/tex] and [tex]\frac{1}2[/tex].

Result is: [tex]\frac{\pi}2[/tex] which is again irrational.

So, a. is not correct.

Checking option b.

Multiply [tex]\pi[/tex] and 1.

Result is: [tex]\pi[/tex] which is again irrational.

So, b. is not correct.

Checking option a.

Multiply [tex]\pi[/tex] and [tex]\frac{1}{10}[/tex].

Result is: [tex]\frac{\pi}{10}[/tex] which is again irrational.

So, c. is not correct.

Checking option d.

Multiply [tex]\pi[/tex] and 0.

Result is: 0 which is rational.

So, d. 0 is the correct answer.

Answer:

  C.  When it was purchased (year 0), the coin was worth $6.

Step-by-step explanation:

The y-intercept is 6, indicating the value of the rare coin was 6 in year zero.

Answer:

a)57

Step-by-step explanation:

Answer:

a: 0.2

b: 0.4

c: 0.95

Step-by-step explanation:

the whole probability is 1, use 1 to subtract and you will find the answer

Answer:

Associative properties of multiplication

Answer:(-5,4)

Step-by-step explanation:

Just took the test on edge

Answer:

(-5,4)

Step-by-step explanation:

Answer:

Step-by-step explanation:

60 x 60 = 3600

3600 x 24

5280 x 12

I know for steps 2 and 3 to be equal, 3600 would have to be half of 5280 because 24 is twice 12, and it’s not. And because 3600 is more than half of 5280, I know that 3600 times 24 is more than 5280 times 12. My answer, therefore, is there are more seconds in a day.

Answer:

Step-by-step explanation:

a. 128

b.148

c.178

d.167

e.295

Answer:

The length of XY is 32

Step-by-step explanation:

Notice that you have a bisector segment (that divides the segment XY  into two equal parts.

since these parts are equal, they must satisfy:

3 x + 1 = 8 x - 24

so, let's solve for x, grouping terms with x on the right of the equal sign, and numerical terms on the left:

1 + 24 = 8 x - 3 x

25 = 5 x

then x = 25/5 = 5

then,now you can find the length of XY as the addition of both parts:

3 x + 1 + 8 x - 24 = 3 (5) +1 + 8 (5) - 24 = 16 + 16 = 32

Answer:

x = -7, 7

Step-by-step explanation:

Step 1: Write out equation

-2x² - 9 = -107

Step 2: Add 9 on both sides

-2x² = -98

Step 3: Divide both sides by -2

x² = 49

Step 4: Square root both sides

x = ±7

Step 5: Arrange

-7 < 7

So x = -7, 7

Answer:

299 and 45 if I am correct due to alternate angles and angles adding up to 360

Answer:

1)B+125=180

so,B=55

and x=B=55(alternate angles are equal)

2)a+136=180

so, a=44

3)2x+3x+x=180

or, 6x=18

so, x=3

Answer:

Step-by-step explanation:

This problem basically tests our understanding of representing word problems using inequalities and equations.

In the first instance, Lawrence can charge his client an amount that is less than $250, hence all terms to the right should not be greater $250 when executed.

Also, the second expression says that he can also charge more than $700 when hence all terms in the right-hand side should be greater than $700 when executed    

Answer:

A

Step-by-step explanation:

Answer:

42=8x+15

Step-by-step explanation:

He spent a total of $42 and $15 of that $42 went to the flowers. It was $x per pound.

Answer:

B

Step-by-step explanation:

soln

=108 ÷36×1/4+2/5×13/4

=108÷9+2/5×13/4

=12+2/5×13/4

=12+13/10

=133/10✅

Answer:

i think it c

Step-by-step explanation:

Answer:

Step-by-step explanation:

let

LM = 2x + 9

MN = 13x-5

NL = 36 – x

find: x

Answer:

-32x + 32

Step-by-step explanation:

7(-3x + 2) - 11x + 18

( -7 * 3x + 7 * 2) - 11x + 18

-21x + 14 - 11x + 18

-21x - 11x + 14 + 18

-32x + 32

Answer:

[tex]4[/tex]

Step-by-step explanation:

[tex]4 - 0.25g + 0.5h = 4 - 0.25(10) + 0.5(5) = 4 - 2.5 + 2.5 = 1.5 + 2.5 = 4[/tex]

Answer:

Step-by-step explanation:

[tex]4-0.25g+0.5h\\g =10\\h=5\\\\4 -0.25(10)+0.5(5)\\\\\mathrm{Remove\:parentheses}:\quad \left(a\right)=a\\=4-0.25\times\:10+0.5\times\:5\\\\\mathrm{Multiply\:the\:numbers:}\:0.25\times\:10=2.5\\=4-2.5+5\times\:0.5\\\\\mathrm{Multiply\:the\:numbers:}\:0.5\times\:5=2.5\\=4-2.5+2.5\\\\\mathrm{Add/Subtract\:the\:numbers:}\:4-2.5+2.5\\=4[/tex]

Answer:

-1/7

Step-by-step explanation:

Divide the first expression by the second expression.

Answer:

25c+5d

Step-by-step explanation:

First, write out the equation as you have been given in the problem:

[tex]5(3c-[d-2(c+d)])\\[/tex]

Next, distribute the -2 to the set of parenthesis containing "c+d" and combine any like terms that you can:

[tex]5(3c-[d-2c-2d])\\5(3c-[-2c-d])[/tex]

Then, distribute the "-"to the "-2c-d" in the brackets and combine and like terms that you can:

[tex]5(3c+2c+d)\\5(5c+d)[/tex]

Finally, distribute the coefficient 5 to the terms inside the parenthesis:

[tex]25c+5d[/tex]

Therefore, 25c+5d is you simplified answer to the problem.

=====================================================

Explanation:

The idea is to plug in the smallest value of the domain, which is x = 1, to get

f(x) = -2x+5

f(1) = -2(1)+5

f(1) = 3

Showing that y = 3 is the largest value in the range. Any larger x value produces a smaller y value. Eg: x = 2 leads to f(2) = 1

So the range is the set of y values such that [tex]y \le 3[/tex] which converts to the interval notation [tex](-\infty, 3][/tex]. This is the interval from negative infinity to 3.

The square bracket says to include the endpoint while the curved parenthesis means we exclude the endpoint. We always exclude infinity as we can't ever reach it.

Greetings from Brasil...

First we will solve the power:

(- 2)⁴ = (- 2)·(- 2)·(- 2)·(- 2) = + 16

rewriting our expression

15 + 48 ÷ (–2)⁴

15 + 48 ÷ 16

(the division / multiplication has priority over the addition / subtraction, so let's do the division first  48 ÷ 16 = 3)

15 + 3

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{540 \: m}}}}}[/tex]

Step-by-step explanation:

Let the length and breadth be 5x and 4x respectively.

Area of rectangular field = 18000 m²

Finding the value of x

Area of rectangle = [tex] \sf{l \times b}[/tex]

Plug the values

⇒[tex] \sf{18000 = 5x \times 4x}[/tex]

Calculate the product

⇒[tex] \sf{18000 = 20 {x}^{2} }[/tex]

Swap the sides of the equation

⇒[tex] \sf{20 {x}^{2} = 18000}[/tex]

Divide both sides of the equation by 20

⇒[tex] \sf{ \frac{20 {x}^{2} }{20} = \frac{18000}{20} }[/tex]

Calculate

⇒[tex] \sf{ {x}^{2} = 900}[/tex]

Squaring on both sides

⇒[tex] \sf{x = 30}[/tex]

Replacing the value of x in order to find the value of length and breadth

Length = [tex] \sf{5x = 5 \times 30 = 150 \: m}[/tex]

Breadth = [tex] \sf{4x = 4 \times 30 = 120 \: m}[/tex]

Finding the perimeter of the rectangular field

Perimeter of rectangle = [tex] \sf{2(l + b)}[/tex]

plug the values

⇒[tex] \sf{2(150 + 120)}[/tex]

Distribute 2 through the parentheses

⇒[tex] \sf{300 + 240}[/tex]

Add the numbers

⇒[tex] \sf{540 \: m}[/tex]

Hope I helped !

Best regards!!

Answer:

2. x > 17

3. x ≤ 7

4. a < 4

5. t ≥ -2

Step-by-step explanation:

Answer:

for the question x is 2 and y is 4

Step by step:

Hi

a number is  additive inverse if  the sum =0

so 0    as the additive inverse of 12 would be -12.

and the additive inverse of -12  is 12 (it works both ways)

The sum of number 12 and the additive inverse of 12 is given by the equation A = 12 - 12 = 0

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

Let the number be n = 12

Now , the additive inverse of the number 12 = -12

So , the sum of 12 and -12 is given by the equation ,

A = 12 - 12

A = 0

Therefore , the value of A is 0

Hence , the sum of the two numbers is 0

To learn more about equations click :

https://brainly.com/question/19297665

#SPJ2

Answer:

[tex]23^{n + 8} = 23^5[/tex].

n = -3.

Step-by-step explanation:

[tex]23^8 * 23^n = 23^5[/tex]

[tex]23^{n + 8} = 23^5[/tex]

Since both sides have the same base (23), we can solve for n.

n + 8 = 5

n = 5 - 8

n = -3.

Hope this helps!

Answer:

[tex]\huge \boxed{n=-3}[/tex]

Step-by-step explanation:

[tex]23^{8} \times 23^{n}=23^{5}[/tex]

[tex]\sf Apply \ rule : a^b \times a^c=a^{b+c}[/tex]

[tex]23^{8+n}=23^{5}[/tex]

[tex]\sf Apply \ rule : a^b=a^c \rightarrow b=c[/tex]

[tex]8+n=5[/tex]

[tex]\sf Subtract \ 8 \ from \ both \ sides.[/tex]

[tex]8+n-8=5-8[/tex]

[tex]n=-3[/tex]