question: the solutions of a quadratic equation are x=-7 and 5. which could represent the quadratic equation and why?

Answer:for the 3rd ques the answer is number 2

Step-by-step explanation:

Answer: There are 227 watches.

Step-by-step explanation:

What I did was that, I added the cost of watch A and B and then divided the sum by $22,000

Answer:

See below

Step-by-step explanation:

1   put in  16 for x

   5/4 (16) + 7 = 27 pounds  at 16 months  

2  5/4 would be the pounds an infant should put on each month

3  7 would be when the infant is born ( x = month 0)     7 pound birthweight

Answer:

See below

Step-by-step explanation

Step-by-step explanation:

1   put in  16 for x

  5/4 (16) + 7 = 27 pounds  at 16 months  

2  5/4 would be the pounds an infant should put on each month

3  7 would be when the infant is born ( x = month 0)     7 pound birthweight

The bathtub had 120 L of water before Barb pulled the plug.

It will take about 9.23 minutes for the water to drain out.

Given equation: L = -5t - 8t + 120

Simplified: L = -13t + 120

Notice how it's written in slope-intercept form (y = mx+b)

The y-intercept (L) is 120. So the coordinates for L = (0 , 120)

The coordinates mean that before the water in the bathtub began draining out, it initially had 120 Liters of water.

Now that we know how many liters there were before, the new equation would look like this: L = -13t --> 120 = -13t

Solving the equation, we get that t = -9.23 minutes

Since time can't be negative, we'll just say that it will take 9.23 minutes to drain out all the water.

Answer:

A has been reflected over the x-axis

B has been reflected over the y-axis

C has been reflected over the x-axis

Step-by-step explanation:

Answer:

2/15

Step-by-step explanation:

The answer choices to this question do not make sense since probability is a measure that is always <= 1.0

Based on the number of times a particular colored tile is drawn we can assume that at the minimum there are 6 green, 20 red, 7 blue, 8 purple and 4 black tiles

Total number of tiles = 6 + 20 + 7 + 8 + 4 = 45

Probability of drawing a green tile = 6/45 = 2/15

Answer:

62

length x width x hight

Step-by-step explanation:

The requried small section of the solar panel does not have an area of 30.4 inches.

Surface area is defined as the measure of a region or surface is called as surface area.

Identify the problem and find the area of the small section.

Formulate the area using the dimensions provided: (10.4 x 4.8)/2

Solve for the area: (49.92)/2 = 24.96

Contrast the calculated area with the given area: 24.96 is not equal to 30.4.

Finalize the answer: Disagree, the small section of the solar panel does not have an area of 30.4 inches.

Thus, the requried small section of the solar panel does not have an area of 30.4 inches.

Learn more about the surface area here: https://brainly.com/question/2835293

#SPJ2

Answer:

1st box: 6/9

2nd box: 1/9

3rd box: 5/9

Step-by-step explanation:

Finding the LCD is pretty simple here, it has to at least be the highest denominator, which is 9, and since 3 goes into 9 evenly we get a LCD of 9.

Then to make the fractions correct we do 2/3 x 3/3 which is 6/9.

So now we figure out 6/9 - 1/9 which is just subtracting the numerator so 6/9 - 1/9 = 5/9 and since that is the most it can be simplified, 5/9 is our answer. Hope this helps!

Answer:

6/9

1/9

5/9

What is a least common denominator?

Well, a least common denominator is the smallest number of all the common multiples of the denominators when 2 or more fractions are given.

Find LCM(3, 9)

3: 3, 6, 9,

9: 9

2/3 =   2/3  × 3/3 =  6/9

1/9 =    1/9 × 1/1 =  1/9

2/3 = 6/9

1/9 = 1/9

6/9 - 1/9 = 5/9

Therefore the answers are in bold.

Answer:

B

Step-by-step explanation:

divide 4 and 12 by 4 and get 1/3

Answer:

642.96

Step-by-step explanation:

To find the surface area"

[tex]SA=2lw+2lh+2wh[/tex]

Insert measurements into the equation:

[tex]SA=2*17\frac{2}{5}*3+2*17\frac{2}{5}*13.2+2*3*13.2[/tex]

Now to go through the very tedious steps of actually solving the equation (we got this!)

Next: Addition

And we have our answer!

I hope this helps and please feel free to comment, give feedback, ask questions, and correct me if I am wrong!

Have a great day

:)

Answer:

1.68% of people would want a longer day

20% of people would want more foreign languages

24.6% of people would want more science

25.8% of people would want longer lunch

27.92% randomly selected

Step-by-step explanation:

Answer:

22
St

ep-by-step explanation:

Find the middle value of the data set and that is your answer. If there are 2 middle values then add them together and divide by 2.

Answer:

5. Area = 28.5 cm; 6. Area = 544,500 cm

Step-by-step explanation:

Area = Length×Width

5. You have to convert the mm to cm by dividing the mm by 10. Then just multiply the length and width.

6. Same thing; different unit, convert the m to cm (or vice versa, not sure which unit you need to answer in) and multiply the length and width.

Answer:

5. Area = 28.5 cm; 6. Area = 544,500 cm

Step-by-step explanation:

Answer:

154+46×9 is the write answer

Answer:

No

Step-by-step explanation:

We can either cross multiply or turn into decimal form to see if they have the same value.

I will be showing both.

Cross Multiply:                                                   Decimal Form:

[tex]\frac{18}{24} \;[\;\;] \frac{10}{15}[/tex]                                                [tex]\mathrm{To\;turn\;fraction\;into\;decimal\;just}[/tex]                                

[tex]18\times15=270[/tex]                                               [tex]\mathrm{Divide\;numerator \;by \;denominator\;}[/tex]

[tex]24\times10=240[/tex]                                                [tex]\mathrm{18\div24=0.75}[/tex]

[tex]\frac{18}{24} \;[ > ] \frac{10}{15}[/tex]                                                           [tex]\mathrm{10\div15=0.66666666666}[/tex]

[tex]\mathrm{As\;a\;result\;we\;can}[/tex]                                             [tex]0.75 > 0.66666666666[/tex]

[tex]\mathrm{conclude\;that\;\frac{18}{24} \;is\;greater\;than\;\frac{10}{15}}[/tex]                     [tex]\frac{18}{24} \;[ > ] \frac{10}{15}[/tex]

We can conclude that 18/24 and 10/15 are not the same.

~Kavinsky

When referring to a dot plot, scatter graph, or scatter plot such as this one, the line that represents the averages of all Y values is known as a line of best fit.

Hope this helps,

Jeron

:)

Answer:

When referring to a dot plot, scatter graph, or scatter plot such as this one, the line that represents the averages of all Y values is known as a line of best fit.

Step-by-step explanation:

Answer:

  (c)  -2/5

Step-by-step explanation:

A "zero" or "root" or "x-intercept" of a function is a value of the independent variable (x) that makes the function (f(x)) have a value of zero. It is found where the graph of the function crosses the x-axis.

A quadratic function will have two (2) zeros. If they are different, one will be smaller than the other (leftmost on the number line).

You may recognize that 25x² and 4 are both perfect squares, (5x)² and 2², respectively. That means the expression (25x² -4) is the difference of squares.

The difference of squares is a special polynomial form, useful for the way it factors:

  a² -b² = (a -b)(a +b)

Here, that means the factored form of f(x) is ...

  f(x) = (5x -2)(5x +2)

The "zero product rule" says a product can only be zero if one or more factors is zero. This is exceptionally useful for determining the zeros of a polynomial function from its factored form.

It tells us f(x) = 0 only when one of (5x-2) = 0, or (5x+2) = 0. These are simple equations to solve to find the corresponding values of x:

  5x -2 = 0   ⇒   5x = 2   ⇒   x = 2/5

  5x +2 = 0   ⇒   5x = -2   ⇒   x = -2/5

The above tells us the zeros of f(x) are -2/5 and 2/5. These values of x make f(x) = 0. The smaller zero is the one that is more negative: -2/5.

  smaller zero: -2/5

__

Additional comment

A polynomial may have complex zeros. Only the real zeros will be x-intercepts on a graph of the function. Complex zeros must be found another way, not by graphing.

Answer:

18 degrees

Step-by-step explanation:

6 hours times 3 Fahrenheit every hour is 18 Fahrenheit

Answer:B

Step-by-step explanation:

Answer:

5.5

Step-by-step explanation:

2,3,3,4,5,7,8,8,8,10,10,12

The mean of this data is 7.5.  So what you are trying to figure out is the mean between 2 and 7.  Since that is 3 and 4 it would be 3.5.  So 3.5 is the Q1.  Now you have to figure out the mean between 8 and 12.  That is 9.  This is Q3.  You have to subtract 9-3.5 and that is the interquartile range. So 5.5 is the answer.  I hope that made sense.

Answer:

2

Step-by-step explanation:

The range of probability of an event lies between 0 and 1.

Hence, 2 cannot be the probability.

Answer:

Main part of backpack V = 840 inᶾ

Front pocket of backpack V = 64 inᶾ

Top curve of the backpack V = 395.8406744 inᶾ

Total V = 1299.840674 inᶾ

Step-by-step explanation:

1.

As we know, the formula for the volume of a rectangular prism is width x height x length (V = whl).  We will use this formula to find the volume of the large rectangular prism (bottom part of the backpack) and the volume of the smaller rectangular prism (the pocket).  As for the cylinder, we know the formula for the volume of a cylindrical prism is pi x radius squared x height (V = πr^2h).  We will use this formula to find the volume of the half cylinder (top curve of the backpack).

2.

For the large rectangular prism (main part of the backpack), we are given:

w = 7in

h = 10in

l = 12in

Now let's incorporate our formula for the volume of a rectangular prism into this situation.

V = whl

V = 7 x 10 x 12

V = 840 inᶾ

3.

Now for the smaller rectangular prism (front pocket of backpack), we are given:

w = 2in

h = 4in

l = 8in

Now let's incorporate our formula for the volume of a rectangular prism into this situation.

V = whl

V = 2 x 4 x 8

V = 64 inᶾ

4.

Now to calculate volume for the half cylinder (top curve of the backpack), we must first imagine that this is a full, circular cylinder.  We are given:

r = 6in

h (which will be the same as the width of the backpack in this case scenario) = 7in

Now let's incorporate our formula for the volume of a rectangular prism into this situation.

V* = πr^2h

V* = π x 6^2 x 7

V* = 791.6813487 inᶾ (round this number if you must)

Now that we have the volume of a whole cylinder, we can halve it (divide by two) since we only need half of the cylinder.

V = V*/2

V = 791.6813487/2

V = 395.8406744 inᶾ (round this number if you must)

5.

Finally, we can add our volumes together to acquire the volume of the backpack as a whole!

Large rectangular prism (bottom part of the backpack) + Smaller rectangular prism (the pocket) + Half cylinder (top curve of the backpack) = Total Volume (Whole backpack)

Recall that:

Large rectangular prism (bottom part of the backpack) = 840 inᶾ

Smaller rectangular prism (the pocket) = 64 inᶾ

Half cylinder (top curve of the backpack) = 395.8406744 inᶾ

So:

Total Volume (Whole backpack) = 840 inᶾ + 64 inᶾ + 395.8406744 inᶾ

Total Volume (Whole backpack) = 1299.840674 inᶾ (round this number if you must)

Answer:

B. 2nd Play and B. 2nd Play

Step-by-step explanation:

#1) Going negative means going backwards.

-8<10.5

#2) Absolute value means making all numbers INSIDE the two lines positive.

I-8I = 8

I10.5I = 10.5