which graph represents y=-2x

Answer:

Step-by-step explanation:

This seems complicated, huh.  

So think about the question.  They want to know the distance from a line, to a point.  first decide if the point could possibly be on the line and there is zero distance.   The given point is at  (-1, 7)    our coordinates of the point are at  -1 in the X direction and at 7 in the Y direction.  If we were to plug in those two number into the given line equation,   y = 3x  would it be a true statement?  no.    7 = 3(-1)  is not true.   so our given point is not on the line.  Next,  find the right angle to the line and point.  make your own line equation that does have our given point in it.  and is at a right angle to the given line.    recall that using a reciprocal can give you a right angle to your line.  y = (- 1/3)X .  Now we just need the given point to plug into our made up line equation and be true.    7 = (-1/3)(-1) + b    .  we need to make this equation true by moving a number into "b" that makes it true.

b = 6[tex]\frac{2}{3}[/tex]  or [tex]\frac{20}{3}[/tex]

7 = (-1/3)(-1) + [tex]\frac{20}{3}[/tex]

now, when does our made up line, y =(-1/3)x + [tex]\frac{20}{3}[/tex], intersect with the given line, y=3x,  that is,  set the two equal

3x = (-1/3)x + [tex]\frac{20}{3}[/tex]

3[tex]\frac{1}{3}[/tex] X = [tex]\frac{20}{3}[/tex]

[tex]\frac{10}{3}[/tex]X = [tex]\frac{20}{3}[/tex]

X=[tex]\frac{20}{3}[/tex] * [tex]\frac{3}{10}[/tex]

X = [tex]\frac{20}{10}[/tex]

X=2

our two equations intersect at 2,  how handy  :)

now we have our two points that are at a right angle from each other and we just need the distance from them

(given) A(-1,7)   and (found) B(2,6)

Distance = [tex]\sqrt{(x2-x1)^{2} + (y2-y1)^{2} }[/tex]

then our given points are A(x1,y1)  and B(x2,y2)

Distance = [tex]\sqrt{(2-(-1))^{2}+(6-7)^{2} }[/tex]

Distance =[tex]\sqrt{3^{2}+(-1)^{2} }[/tex]

Distance = [tex]\sqrt{9+1}[/tex]

Distance = [tex]\sqrt{10}[/tex]

Distance = 3.1622

Distance =3.2 (rounded to nearest 10th)

Yes, that was kinda a lot  :/

The statement that best describes the rate of change of the linear function is given as follows:

For each increase of 1ºF in temperature, the average weight of the strawberries decays by 7/3 grams.

The slope-intercept definition of a linear function is given as follows:

y = mx + b.

The coefficients are listed as follows:

The input and the output variables for this problem are given as follows:

The function is defined as follows:

y = -7x/3 + 72.75.

Hence the slope is:

m = -7/3.

And the interpretation, considering the input and output variables, is that for each increase of 1ºF in temperature, which is the input variable, the average weight of the strawberries, which is the output variable, decays by 7/3 grams.

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x = 14.8 (OR) x = 74/5.

Step-by-step explanation:

If you add 5 times a number to 6 you will get 80.

We don't know what number is multiplied with five and that number should added with 6. So,

Let, the unknown number be named as x.

The eqⁿ will be

[tex]{ \red{ \sf{5}}}{ \green{ \sf{x}}} \: + \: { \red{ \sf{6}}} = { \red{ \sf{80}}} → Eqⁿ(1) [/tex]

Shift 6 to the right side.

[tex]{ \red{ \sf{5}}}{ \green{ \sf{x}}} = { \red{ \sf{80 - 6}}}[/tex]

[tex]{ \red{ \sf{5}}}{ \green{ \sf{x}}} = { \red{ \sf{74}}}[/tex]

Divide both the sides by 5. then,

[tex]{ \red{ \sf { \cancel{\frac{5}{5}}}}} { \green{ \sf{x}}} = {{ \frac{ \cancel{74} {}^{ \green{ \sf{{ 14.8}}}} }{ \cancel5}}} [/tex]

[tex]{ \red{ \boxed{ \purple{ \sf{x = 14.8}}}}} \: { \tt{(or)}} \: { \red{ \boxed{ \purple{ \sf{x = \frac{74}{5}}}}}} [/tex]

___________________________________

[tex]{ \red{ \sf{ \underline{verification}}}} [/tex]

Let us substitute the value of x in Eqⁿ(1) then,

[tex]{ \red{ \sf{5}}}{ \green{ \sf{(14.8)}}} \: + \: { \red{ \sf{6}}} = { \red{ \sf{80}}} [/tex]

[tex]{ \red{ \sf{74}}} \: + \: { \red{ \sf{6}}} = { \red{ \sf{80}}} [/tex]

[tex]{ \red{ \sf{80}}} = { \red{ \sf{80}}} [/tex]

Hence, our answer is correct

Answer:

-1/2

Step-by-step explanation:

Ignore the (2,2) just use (-2,1) and (-4,2)

- Solution for 33 is what percent of 132:

- Percentage solution with steps:

Step 1: We make the assumption that 132 is 100% since it is our output value.

Step 2: We next represent the value we seek with "x".

Step 3: From step 1, it follows that 100%=132

Step 4: In the same vein, x%=33

Step 5: This gives us a pair of simple equations:

100%=132(1)

x%=33(2)

Step 6: By simply dividing equation 1 by equation 2 and taking note of the fact that both the LHS (left-hand side) of both equations have the same unit (%); we have

100%/x% = 132/33

Step 7: Taking the inverse (or reciprocal) of both sides yields

x%/100%=33/132

x=25%

Therefore, 33 is 25% of 132

Answer:

Step-by-step explanation:

Since the two angles of both triangles are congruent, it makes the remaining angles congruent too:

Then we have:

So both C and F are 30°.

By finding the slopes of the two segments we can see that the segments are not parallel nor perpendicular.

The slope for a segment whose endpoints are:

(x₁, y₁) and (x₂, y₂) is:

slope = (y₂ - y₁)/(x₂ - x₁)

Two segments are:

Segment AB has endpoints (-1, -1) and (1, 5), so the slope is:

s = (5 + 1)/(1 + 1) = 3

For segment CD the endpoints are (1, 2) and (5, 4), so the slope is:

s' = (4 - 2)/(5 - 1) = 2/4 = 1/2

So the slopes are different and their product is obviously not -1, then the lines are neither parallel nor perpendicular.

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The variable y vary directly with respect to x , and the equation to denote this direct variation is y = 1.375 x .

From the table we can see that the values of x are 8 for the y value of 11

Any direct variation is represented by the equation :

y = k x , where k is a constant

now we put the values of x and y in the equation to calculate k

11 = k × 8

or, k = 11 / 8 = 1.375

again , at x = 16 , y is 22

∴ k = 22/16 = 1.375

Hence the equation for direct variation will  be given by

y = kx

or, y = 1.375 x

When one quantity changes directly in reaction to a change in another quantity, this is a type of proportionality known as "direct variation." This implies that if one quantity rises, the other will rise correspondingly as well.

Like in the previous illustration, if one quantity decreases, the other quantity also decreases. Direct variation will have a linear relationship with the graph, resulting in a straight line.

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Answer:

by knowing the sum of the shape represented

The correct statement is,

''The smallest number that both denominator numbers will include into.''

What is Least common multiple?

The Least common multiple of two or more numbers are the smallest number that is multiple of two or more numbers.

Given that;

The statement is,

The smallest number that both denominator numbers will __ into.

Now,

We know that;

The LCM of two or more numbers is divided by the numbers or its include all the numbers.

Thus, The correct statement is,

''The smallest number that both denominator numbers will include into.''

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Answer:

f(-8) = 31

Step-by-step explanation:

f(-8) = -3(-8) + 7

      = 24 + 7

      = 31

Answer:

A = Research question

B = Hypothesis

C = Analysis of data

D = Reflecting on the results

Step-by-step explanation:

Im 85% sure

Answer:

Step-by-step explanation:

That's a lot of exclamation marks  :DDDDD  

Rate of change,   Δ  often said as  "delta"   or also known as slope of a line. Rate of change is much easier when it's a line

it's just the slope of the line.

I see that the line in the picture... so the graph of the line.... is going down 1 after it goes over 4... so rate of change is rise over run..

-1 / 4

see how I got that?

so B) looks good

The value of x = 41.02°

The ratios of lengths of a right-angled triangle's sides are known as trigonometric ratios. These trigonometric ratios connect the ratio of a right triangle's sides to each angle.

sin = (Opposite side/ Hypotenuse)

cos = (Adjacent side/ Hypotenuse)

tan = (Opposite side/ Adjacent side)

Here we have

A plane is 141 m north and 162 m east of an airport.  

x is an angle that the pilot should turn in order to fly directly to the airport.

[ The picture that can represent the above information is given below ]  

From given figure

ABC is a right-angled triangle with a right angle at A          

As we know from trigonometric ratios

Tan θ = Opposite side/Adjacent side  

⇒ Tan x = 141/162

⇒ Tan x = 141/162    

⇒ Tan x = 47/54      

⇒ Tan x = 0.870  

⇒ x = Tan⁻'(0.870)  

⇒ x = 41.02°  

Therefore,

The value of x = 41.02°

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The burj khalifa is 7.56 football fields tall .

We have the height of the  Burj Khalifa as = 2722 feet

And the given height of  one football field is = 360 feet

Now using the Unitary method we can calculate the number football fields that would be equal to the height of the burj khalifa .

So ,

360 feet is equal to football fields = 1

1 feet is equal to football fields = 1/360 fields

therefore

2722 feet will be equal to fields = (1/360) x 2722

                                                     =  7.56 fields

So the Burj Khalifa is equal to  7.56 football fields.

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Answer:

YT= 23

We know that:

line RU is 32 and US is 16

line RY is 46

In other words, RU = 32, US = 16, and RY = 46

so we use the triangle proportionality theorem to state that:

[tex]\frac{RU}{US}=\frac{RY}{YT}[/tex]

Input your values

[tex]\frac{32}{16} =\frac{46}{YT}[/tex]

Use cross products :

[tex]32YT=(16)(46)[/tex]

Simplify:

[tex]32YT=736[/tex]

[tex]\frac{32YT}{32} =\frac{736}{32}[/tex]

[tex]YT=23[/tex]

I hope this answers you question :)

The slope of this line, and what it represent is: The slope is 30, and it represents the increase in temperature, in degrees Fahrenheit, each minute the oven is on.

Mathematically, the standard form of the equation of a line can be calculated by using this equation:

y = mx + c          .......equation 1.

Where:

From the information provided, we have the following equation of line:

F = 30t + 70      ..........equation 2.

Comparing equation 1 and equation 2, we have:

Slope, m = 30, which is the increase in temperature of the oven in degrees Fahrenheit.

y-intercept, c = 70, which also represents the initial temperature of the oven in degrees Fahrenheit.

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Complete Question:

The table below shows the temperature of an oven, in degrees Fahrenheit, t minutes after it is turned on. An equation for a line of best fit for these data is F = 30t + 70. What is the slope of this line, and what does it represent?

answer choices

The slope is 30, and it represents the initial temperature, in degrees Fahrenheit, of the oven.

The slope is 70, and it represents the initial temperature, in degrees Fahrenheit, of the oven.

The slope is 30, and it represents the increase in temperature, in degrees Fahrenheit, each minute the oven is on.

The slope is 70, and it represents the increase in temperature, in degrees Fahrenheit, each minute the oven is on.

The total attendance for Lincoln school for month of March is 7308.

What is average attendance?

Divided by the total number of days in the ordinary school year, is the total number of days that students were present. One ADA(Avg. Daily attendance) would be the number of students who attend every day. The number of kids enrolled in each school and district, known as enrollment, is not the same as ADA.

Main Body:

So according to formula ,

Average daily attendance = Total attendance / total days of school

348 = total attendance/ 21

total attendance = 348* 21

                            = 7308

Hence total attendance is 7308.

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a = amount invested at 8%

how much is 8% of "a"? (8/100) * "a", namely 0.08a.

b = amount invested at 6%

how much is 6% of "b"? (6/100) * "b", namely 0.06b.

we know the total amount invested is 210000, so whatever "a" and "b" might be, we know that a + b = 210000.

we also know that the yielded amount in interest is the same for both, so whatever 0.08a and 0.06b are, we know they're the same.

[tex]\begin{cases} a+b=210000\\\\ 0.08a=0.06b \end{cases}\hspace{5em}a+b=210000\implies b=210000-a \\\\\\ \stackrel{\textit{substituting on the 2nd equation}}{0.08a~~ = ~~0.06(210000-a)}\implies 0.08a=12600-0.06a\implies 0.14a=12600 \\\\\\ a=\cfrac{12600}{0.14}\implies \boxed{a=90000}\hspace{9em}\boxed{\stackrel{210000~~ - ~~90000}{b=120000}}[/tex]

Answer:

D

Step-by-step explanation:

discriminant = 9 - 4(10 * 3)

9 - 4 * 30

9 - 120 = -111

Is negative so the equation has two complex solutions

Answer:

i don't understand

Step-by-step explanation:

the question is 11 divided 2and2over 3

[tex]=\frac{x^{3}(4x^{2} -25) }{2x-5} \\=\frac{x^{3} (2x+5)(2x-5)}{2x-5} \\=x^{3} (2x+5)\\=2x^{4}+5x^{3}[/tex]

⇒Note there was a 2x-5 in the numerator and a 2x-5 in the denominator so they canceled each other. Leaving the above expression.

Answer:

vertex = (- 1, - 4 )

Step-by-step explanation:

the equation of a parabola in vertex form is

f(x) = a(x - h)² + k

where (h, k ) are the coordinates of the vertex and a is a multiplier

f(x) = 3(x + 1)² - 4 ← is in vertex form

with vertex = (- 1, - 4 )

Answer:

(−1,−4)

Step-by-step explanation:

f(x)=3(x+1)2−4

P (or Q) and mark an arc roughly where M's reflection across AB is located.

One tool for drawing circles is a compass. According to the circle's radius, which is drawn with a compass, the sizes of the circles vary.

A compass's handle is held in place by our thumb and forefinger. A circle is typically drawn using just one hand. Between the forefinger and thumb, the compass is turned.

Around this point, the pencil tip is rotated. The circle's radius is determined by the distance between the pencil tip and the compass needle. A ruler is used to set it. The gap can be adjusted by adjusting the angle between the compass's arms.

At that point of reflection (M'), arcs drawn from P and Q in M's approximate location across AB will intersect. As desired, the line passing through point M and perpendicular to AB will connect M and M'.

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The equations 2.3p - 101 = 6.49p -4 and 23p - 101 = 65p - 40 - p are the equation that has the same solution:

The given equation is:

2.3p - 10.1 = 6.5p - 4 - 0.1p

The first option is:

2.3p - 10.1 = 6.4p - 4

which is equal to the given equation.

The second option:

230p - 1010 = 650p - 400 - p

which is not equal to the given equation

The third option:

23p - 101 = 65p - 40 - p

which is equal to the given option.

The last option:

2.3p - 14.1 = 6.4p -4

which is not equal to the given option.

Therefore equations 2.3p - 10.1 = 6.4p - 4 and 23p - 101 = 65p - 40 -p are the correct option.

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The value of the fraction -34/87 to the lowest term is still -34/87 as there's no common factor.

A fraction is simply a piece of a whole. The number is represented mathematically as a quotient where the numerator and denominator are split.

To reduce to lowest term, divide the numerator and denominator by the greatest common factor to reduce a fraction to its simplest terms.

The steps involved are:

In this case, there is no common factor and the value is still the same as -34/87.

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The standard deviation of the number of residents in the sample who were born in Colorado is 7.82

Standard deviation:

The measure which shows how much variation (such as spread, dispersion, spread,) from the mean exists is know as standard deviation.

Given,

According to 2015 census data, 42.7 percent of Colorado residents were born in Colorado. if a sample of 250 Colorado residents is selected at random.

Here we need to find the standard deviation of the number of residents in the sample who were born in Colorado.

Here we know that following details,

Number of sample = 250

Estimated proportion for residents born in Colorado = 42.7% which is equal to = 0.427.

Let us consider X be the random variable of interest (number of residents in the sample), on this case we now that:  

X ~ (n = 250, p = 0.427)

Now, according to the probability mass function for the Binomial distribution is given as:  

E(X) = n x p = 250 x 0.427 = 106. 75.

Now, the standard deviation for the random variable is given by:

SD = √106.75 (1 - 0.427)

SD = √106.75(0.563)

SD = 7.82

Therefore, the standard deviation is 7.82.

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For any given graph when "a" is a number between zero and one then graph of the function get horizontal stretch.

And when "a" is a number greater than one then graph of a function get horizontal compress.

As given in the question,

For any graph of a function,

When "a" is a number between zero and one than the graph of the function get horizontal stretch.

f(x) = ax²

let a = 1/2 , 0 < 1/2 < 1 so satisfied the condition of "a" between zero and one.

f(x) = x²/2

In this case , graph of the given function get horizontal stretch compare to original graph.

When a = 2 , 2 > 1 satisfied the condition of "a" greater than one.

f(x) = 2x²

In this case , graph of the given function get horizontal compress compare to original graph.

Therefore, for any given graph when "a" is a number between zero and one then graph of the function get horizontal stretch.

And when "a" is a number greater than one then graph of a function get horizontal compress.

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The vertices have been shifted toward the left by 1 unit and also 3 units up to form the image F'I'S'H'.

What is graph transformation?

Graph stretching

Observing each of the vertices of the square, we can say that the vertices have been shifted toward the left by 1 unit and also 3 units up to form the image F'I'S'H'. So, the transformation involved in moving the preimage FISH to form F'I'S'H' the image is translation.

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