what is the domain of this function?

[tex]\dfrac{15(15-1)}{2}=\dfrac{15\cdot14}{2}=15\cdot7=105[/tex]

Check the picture below.

Answer:

i think its d

Step-by-step explanation:

Answer:

Step-by-step explanation:

[tex]\text{The average rate of change of function}\ f(x)\\\text{over the interval}\ a\leq x\leq b\ \text{is given by this expression:}\\\dfrac{f(b)-f(a)}{b-a}\\\\f(x)=2x^2-7x\\\\\text{Put the values of x = 2 and x = 6 to the equation of the function:}\\\\f(2)=2(2^2)-7(2)=2(4)-14=8-14=-6\\f(6)=2(6^2)-7(6)=2(36)-42=72-42=-30\\\\\dfrac{f(6)-f(2)}{6-2}=\dfrac{-30-(-6)}{4}=\dfrac{-24}{4}=-6[/tex]

Let your age = X

Now you have 500 - 3x = 278

Subtract 500 from each side:

-3x = -222

Divide both sides by -3:

x = -222 / -3

x = 74

You are 74 years old.

The age of an old man is 74 years old.

A word problem is a verbal description of a problem situation. It consists of few sentences describing a 'real-life' scenario where a problem needs to be solved by way of a mathematical calculation.

For the given situation,

Let the age of an old man be x.

500 reduced by 3 times my age is 278 can be expressed as

⇒ [tex]500-3x=278[/tex]

⇒ [tex]500-278=3x[/tex]

⇒ [tex]222=3x[/tex]

⇒ [tex]x=\frac{222}{3}[/tex]

⇒ [tex]x=74[/tex]

Hence we can conclude that the age of an old man is 74 years old.

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Answer:

50-4h<32

Step-by-step explanation:

If the temperature starts at 50 and the temperature is decreased by 4 per each hour, then:

1) after the first hour, the temperature is 50-4 or 46

1) after the second hour, the temperature is 46-4 or (50-4)-4 or 50-4(2).

So what I'm trying to show you that if I continue this pattern our equation for what happens h hours later is: 50-4h.

We want to know when is the temperature below 32 so less than 32.

Temperature<32

Put in our variable expression for temperature.

50-4h<32

The question is about using algebra to solve a real-life problem of temperature decrease. The correct inequality for the given problem is '50 - 4h < 32', which shows the number of hours it takes for the temperature (50 and decreasing 4 every hour) to be less than 32 degrees.

The subject matter of this question is mathematics, specifically algebra and inequalities. The question provides that the temperature in degrees Fahrenheit is reducing by 4 each hour from a starting point of 50°F and seeks to find the number of hours (h) it takes for the temperature to decrease below 32°F.

We can represent this situation as an inequality: 50 - 4h < 32. In English, this states that the temperature (50, decreasing by 4 each hour) should be less than 32 degrees. So, to answer your question, option B with '50 - 4h < 32' is the correct inequality for this problem.

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Answer:

P(A or B) = 0.65

Step-by-step explanation:

Given that P(A) = 0.60, P(B) = 0.20, and P(A and B) = 0.15

We have to find P(A or B)

Apply the formula:

P(A or B) = P(A)+P(B)- P(A and B)

Now substitute the values in the formula:

P(A or B) = 0.60 + 0.20 - 0.15

P(A or B) = 0.80 - 0.15

P(A or B) = 0.65

Thus P(A or B) = 0.65  ....

Answer:

0.65 ~apex

Step-by-step explanation:

Answer:

All real numbers

Step-by-step explanation:

we have

f(x) = 3x +9

The linear function  has a range of all real numbers -------> (-∞, ∞)

f(x) can take any real value.

Please see attached image below, for more information

Answer:

I think its B because K is = to Y

So if K is 9 then the asymptote would be 9

Limiting the Y to the to be only greater than 9

Step-by-step explanation:

The standard equation of a parabola with vertex (0, 0) and focus (-2, 0) is y^2 = -8x. It opens to the left with the directrix x = 2.

To find the standard equation of a parabola with vertex (0, 0) and focus (-2, 0), we can use the definition of a parabola as the set of all points equidistant from a point (the focus) and a line (the directrix).

Since the focus is at (-2, 0), the directrix is a vertical line equidistant from the vertex on the opposite side of the focus, which is x = 2. The distance between the vertex and the focus (or the vertex and the directrix) is 2 units, so q = 2. This means that the parabola opens to the left.

The standard equation for a parabola that opens horizontally is of the form (y - k)^2 = 4p(x - h), where (h, k) is the vertex and p is the distance from the vertex to the focus. Here, p = -2 because the parabola opens to the left.

Therefore, the standard equation for the given parabola is y^2 = -4(2)x or y^2 = -8x.

Answer: [tex]8.0*10^{-4}[/tex]

Step-by-step explanation:

You need to remember the Quotient of powers property:

[tex]\frac{a^m}{a^n}=a^{(m-n)}[/tex]

Then, given the expression:

[tex]\frac{(4.0*10^6)}{(5.0*10^9)}[/tex]

You must divide the coefficients and subtract the exponents. Then:

[tex]=0.8*10^{-3}[/tex]

In order to write this result in Scientific notation form, you need to move the decimal point one place to the right. Therefore, you get:

[tex]=8.0*10^{-4}[/tex]

Answer:

B A triangle in which no two sides are congruent is scalene

Step-by-step explanation:

A triangle that has 3 congruent sides is an equilateral triangle

A triangle in which no two sides are congruent ( no sides are the same) is a scalene triangle

A triangle that has at least two congruent sides is an isosceles triangle

Answer:

a triangle in which no two sides are congruent

Step-by-step explanation:

Answer:

It is A i believe.

Step-by-step explanation:

Because, 15/100 = 0.15 and y is your regular price so;

y - 0.15

Sorry had to rewrite what i did, but i hope my answer has helped you.

Answer:

9 seconds.

Step-by-step explanation:

On your graph, use a ruler and your eye to get the best fitting line.  

Then find the time in seconds (45) which is between 40 and 50 on the x axis.

Go across to the y axis. You will find it is about 9 seconds.

Based on the information depicted by the graph, the distance of the storm 45 seconds between Lightning and Thunder will be 9 miles

From the graph, we can create a proportional relationship thus :

Distance from storm = Seconds between Thunder

4 miles = 20 seconds

Let the miles traveled by Storm between 45 seconds = s

Hence, we have ;

4 miles = 20 seconds

s miles = 45 seconds

Cross multiply :

20s = 45 × 4

20s = 180

Divide both sides by 20

s = 180 / 20

s = 9 miles

Therefore, the storm will be 9 miles away.

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Answer:

∠PRQ = 85°

Step-by-step explanation:

∠PRS and ∠TRQ are vertical angles and congruent, thus

4x + 15 = 3x + 35 ( subtract 3x from both sides )

x + 15 = 35 ( subtract 15 from both sides )

x = 20

Hence ∠PRS = (3 × 20) + 35 = 60 + 35 = 95°

∠PRQ and ∠PRS form a straight angle and are supplementary, hence

∠PRQ = 180° - 95° = 85°

Answer:

Angle QRP = 85

Step-by-step explanation:

Hopefully you can see QRS and TRP both equal 180 degrees, we will use this.  

QRS is the same as QRP and PRS added together.  Just like TRP is TRQ and QRP.  We will call QRP R for simplicities sake, and we are given a formula for PRS and TRQ.  PRS = 3x+35 and TRQ = 4x+15.

So now we have two equations.

180 = QRP + PRS = R + 3x + 35

180 = TRQ + QRP = 4x + 15 + R

So it's basically a system of equations.

180 = 35 + R + 3x

145 = R + 3x

R = 145 - 3x

180 = 4x + 15 + R

Replace R with what we found in the last  equation

180 = 4x + 15 + 145 - 3x

180 = x +160

x = 20

Now go back to the first equation and plug 20 in for x

R = 145 - 3x

R = 145 -3(20)

R = 145 - 60

R = 85

So Angle QRP = 85

Let em know if something doesn't make sense.  

Answer:

y = [tex]\frac{1}{4}[/tex] x - 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = - 4x + 3 ← is in slope- intercept form

with slope m = - 4

Given a line with slope m then the slope of a line perpendicular to it is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{-4}[/tex] = [tex]\frac{1}{4}[/tex], hence

y = [tex]\frac{1}{4}[/tex] x + c ← is the partial equation of the perpendicular line

To find c substitute (8, 1 ) into the partial equation

1 = 2 + c ⇒ c = 1 - 2 = - 1

y = [tex]\frac{1}{4}[/tex] x - 1 ← equation of perpendicular line

Answer:

11

Step-by-step explanation:

It is given that:

r = 14 & s = 8

Plug in the corresponding numbers to the corresponding variables:

(3/7)(14) + (5/8)(8)

Solve. Remember to simplify. Do multiplication & division first, then add:

(3/7)(14) + (5/8)(8)

(3 * 14)/7 + (5 * 8)/8

(3 * 2) + 5

(6) + 5

11

11 is your answer.

~

Answer:

[tex]x^{3} -12[/tex]

Step-by-step explanation:

[tex]y=\sqrt[3]{x+12}[/tex]

Replace x with y to get

[tex]x=\sqrt[3]{y+12}[/tex]

Cube both side

[tex]x^{3}=y+12[/tex]

Subract 12 from both sides

[tex]x^3-12=y[/tex]

Answer:

x  ≥ 9.2

Step-by-step explanation:

If in a gymnastics competition an athletes final score is calculated by taking 75% of the average technical score and adding 25% of the artistic score all scores are out of 10 and one gymnast has a 7.6 average technical score, the gymnast needs x  ≥ 9.2 to have a final score of at least 8.0.

7.6 x 75 / 100 = 5.7

Final answer:

The gymnast requires an artistic score of at least 9.2 to achieve a final score of at least 8.0, calculated by taking 75% of their average technical score and adding 25% of their artistic score.

Explanation:

To find out what artistic score the gymnast needs to achieve a final score of at least 8.0, we use the given information that the final score is composed of 75% of the average technical score plus 25% of the artistic score. Let's represent the artistic score as A.

First, calculate 75% of the average technical score:
0.75 × 7.6 = 5.7

Now, set up the equation using the required final score (8.0) and the known technical score (5.7):
5.7 + 0.25A ≥ 8.0

To find the minimum artistic score (A), we subtract 5.7 from both sides of the equation:
0.25A ≥ 8.0 - 5.7
0.25A ≥ 2.3

Finally, divide by 0.25 to solve for A:
A ≥ ÷ 0.25
A ≥ 9.2

So, the gymnast would need an artistic score of at least 9.2 to achieve a final score of at least 8.0.

In the polygon QRST, the angle that is formed between sides SR and SQ is known as the angle RSQ.

In the polygon QRST, the angle included between sides SR and SQ is named as the angle RSQ. In polygons, the included angle between two sides is the angle that both sides share. Here, sides SR and SQ share vertex S, so the included angle is at S, formed by extending from R through S to Q. Hence, we denote this angle as RSQ.

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Answer:

i think the answer is choice H

Step-by-step explanation:

the number of girls to total number of members is 12:22, if you simplify this it's 6:11

Answer:

6:11

Step-by-step explanation:

There are 12 girls.

There are 12+10 member in all.

That means there are 22 members in all.

So the ratio of girls to total members is 12 to 22 or 12:22. To reduce this, look for a common factor. 12 and 22 both share 2 as a common factor so divide both by 2 gives you 6:11.

Answer:

x = 21

Step-by-step explanation:

x- 12 = 9

Add 12 to each side

x- 12+12 = 9+12

x = 21

Answer:

[tex]\huge \boxed{x=21}[/tex]

Step-by-step explanation:

[tex]\Huge\textnormal{Add 12 from both sides of the equation.}[/tex]

[tex]\displaystyle x-12+12=9+12[/tex]

[tex]\Huge \textnormal{Simplify and solve to find the answer.}[/tex]

[tex]\displaystyle 9+12=21[/tex]

[tex]\huge \boxed{x=21}[/tex], which is our answer.

Answer:

the answer is c glad i could help

Answer:

(see attached)

Step-by-step explanation:

Rearrange the equation in the form y (≥ or ≤) mx + c , so that you get:

y ≥ (-1/2)x - (9/20)

Graph this equation.

Test a random point on either side of the line to see which side is valid (and shade)

we try the origin (0,0)

This makes the equation :

(0) ≥ (-1/2)(0) - (9/20)

0 ≥ - (9/20)  (this inequality is valid, so that means the point we picked (0,0) falls on the valid side. Shade that side. (in this case the region above the line)

Answer:

2

Step-by-step explanation:

So we are going to do

(sum of parts of the secant)(part on outside)=(sum of parts of the secant)(part on outside) .

This is what you get from doing that:

(1+x+4)(x+4)=(11+x+1)(x+1)

Simplifying:

(x+5)(x+4)=(x+12)(x+1)

We could see which value of x makes both side the same.

Choice 1: Plug in 2 for x:

(2+5)(2+4)=(2+12)(2+1)

(7    )(6    )=( 14   )(3)

      42    =  42

This equation is true.

Choice 2: Plug in 3 for x:

(3+5)(3+4)=(3+12)(3+1)

(    8)(    7)=(    15)(   4)

     56     =   60

This equation is not true.

Choice 3: Plug in 6 for x:

(6+5)(6+4)=(6+12)(6+1)

( 11   )(  10 )=( 18   )(7   )

110            =   126

This equation is not true.

Choice 4: Plug in 7 for x:

(7+5)(7+4)=(7+12)(7+1)

(12  )( 11   )=( 19   )(8)

132         =152

This equation is not true.

Answer:

The answer is A or "2"

Step-by-step explanation:

Answer:

$30

Step-by-step explanation:

Find the cost per marker.

Given: 8 markers = $20

Divide 8 from both sides.

Let x = amount of markers.

(8x)/8 = (20)/8

x = 2.5

Each marker costs $2.50

Now, multiply 12 with $2.50

2.50 x 12 = 30

$30 is the cost of 12 markers.

~

Answer:

$8.40

Step-by-step explanation:

You multiply $12 by 0.7 and get $8.40

Answer:

$8.40

Step-by-step explanation:

Since 1 Liter costs $12, you can multiply 12 by 0.7 (L) to get the answer.

Answer is 8.4, so it's $8.40

Answer:

Step-by-step explanation:

A polygon is a plane figure that is described by a finite number of straight line segments connected to form a closed polygonal chain or polygonal circuit.

Check the picture below.

If sides SX=5,SY=10,XU=4,YT=x then the length of ST=18.

A triangle is a two dimensional figure having three sides, three angles, three vertex. Th sum of all the angles is equal to 180°.

We have been given SX=5, XU=4,SY=10 and we are required to find the length of ST. We can write the sides as under:

SX/SU=SY/T

SX=5,SU=5+4=9,SY=10,ST=10+x

5/9=10/(10+x)

Solving this for the value of x.

5(10+x)=10*9

50+5x=90

5x=90-50

x=40/5

x=8

We know that ST=10+x.

We have to put the value of x in ST.

ST=10+8

=18

Hence if sides are SX=5,SY=10,XU=4,YT=x then the length of ST=18.

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Answer:

180 in

Step-by-step explanation:

The perimeter is just the sum of the lengths of the sides of the shape.

So all we need to do here is:

40+10+(40-18)+(50-10)+18+50.

I got (40-18) for the bottom of the top rectangle, the part that is poking out.

I got (50-10) for the right side of the rectangle that is poking out towards the bottom.

40+10+(40-18)+(50-10)+18+50

40+10+22       +40       +18+50

50     +62                      +68

50+62+68

112+68

180

180 in

I'm going to post a drawing here to show the lengths I was talking about:

Answer:

[tex]\sqrt[5]{y^{3} }[/tex]

Step-by-step explanation:

[tex]y^{\frac{3}{5} } = y^{\frac{1}{5} * 3}[/tex] = [tex]\sqrt[5]{y^{3} }[/tex]

This is true because of the fractional exponent rule.

Answer:

Step-by-step explanation:If  

n

is a positive integer that is greater than  

x

and  

a

is a real number or a factor, then  

a

x

n

=

n

√

a

x

.

a

x

n

=

n

√

a

x

Use the rule to convert  

y

3

5

to a radical, where  

a

=

,  

x

=

, and  

n

=

.

5

√

y

3

Answer:

4(x-7)^2-(x-7)+3 (Assuming t is f)

Step-by-step explanation:

Let s(x)=x-7 and t(x)=4x^2-x+3 .

(t o s)(x)=t(s(x))=t(x-7)

Before I continue this means replace the orginal x in t with x-7.

This will then give you

4(x-7)^2-(x-7)+3