help please this is timed

Answer:

0.0357142857142857

The features of the quadratic function f(x) = x^2 + 10x + 21  are Vertex = (-5,-4), y-intercept = (0,21), x-intercepts = (-7,0) and (-3,0), axis of symmetry is x = -5 so option (A) will be correct.

An algebraic equation of the second degree in x is a quadratic equation. The quadratic equation is written as ax2 + bx + c = 0, where x is the variable, and a must not be zero.

For example 3x² + 6x + 8 = 0 here x has highest term as 2 and coefficient of x² is not zero.

The standard form of a quadratic equation is ax² + bx + c

The x vertex is given -b/2a

So,

x-vertex = -10/2 = -5

So y = (-5)² + 10(-5) + 21 = -4

So vertex is (-5, -4)

The Y-intercept is given as (0,y)

So,

y = 21

Therefore

y-intercept = (0,21)

the x-intercept is given as (x,0)

So,

x = -7 , -3

Therefore

x-intercepts = (-7,0) and (-3,0)

The Axis of symmetry is given by -b/2a

So,

⇒ -10/2 = -5

Hence "Vertex = (-5,-4), y-intercept = (0,21), x-intercepts = (-7,0) and (-3,0), axis of symmetry is x = -5".

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Answer:

9f

Step-by-step explanation:

3f + 7f - f = 9f

Answer:

3f + 7f -f equals 9f

Step-by-step explanation:

First, you would add 3f and 7f together making 10f. Then you will subtract 10f from f and get 9f.

Answer:

the answer is b)(4,-4)

please mark as brainiliest.

Answer:

(-2,2)

Step-by-step explanation:

Answer:

31

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

[tex](x+4)−(x−1)\\\\\mathrm{Remove\:parentheses}:\quad \left(a\right)=a\\=x+4-\left(x-1\right)\\\\-\left(x-1\right):\quad -x+1\\=x+4-x+1\\\\\mathrm{Simplify}\:x+4-x+1:\\\quad 5\\\\[/tex]

Answer:

16

Step-by-step explanation:

140 divided by 9 = 15.5

you need 16 vans to hold 140 tourists

The mathematical expression does not seem clear but I have made an attempt to make sense of what is implied.

Answer:

a = 4, b = 2, c = 16, d = 9

Solving the first part of the question by indices,

Comparing the rightmost term with the second term in the question,

a = 4, b = 2

Solving on,

Comparing with the final term in the question,

c = 16 and d = 9

Therefore,

a = 4, b = 2, c = 16, d = 9

pls give brainest

Answer:

A - 4

B - 2

C - 16

D - 9

Step-by-step explanation:

Just took the test on edg 2020

Answer:

Hi there

Your answer is

s= (twv)/u

Step-by-step explanation:

su=twv

/u

s= (twv)/u

Answer:5?

Step-by-step explanation:2+3 is 5 unless your doing some other math?

Answer:

10x-14=26

Step-by-step explanation:

x = 4

10 x 4 = 40

40 - 14 = 26

Answer:

26

Step-by-step explanation:

In order to answer this question, we must first find what x equals, so we need to solve for x in the equation 5x - 7 = 13:

5x - 7 = 13

     +7   +7

5x = 20

/5     /5

x = 4

Now, we plug in 4 for 'x' in the equation 10x - 14:

10(4) - 14 =

40 - 14 =

26

So, 10(4) - 14 = 26

Hope this helps :)

Answer:

me

Step-by-step explanation:

Answer:

Yes pls

Step-by-step explanation:

im thirsty my guy

Answer:

4f+2

Step-by-step explanation:

Step-by-step explanation:

Let the number of frogs be x.

According to statement,

2 more than the number of frogs is 4 .

So,

[tex]\boxed{\tt{2 + x = 4}}[/tex] is the required Equation.

If solution, then,

[tex]x = 4 - 2[/tex]

[tex]x = 2[/tex]

Hope it helps :)

Answer:

g(-3)=3

Step-by-step explanation:

Answer:

0

Step-by-step explanation:

It is always going to be 0 because there is always going to be a 2 and a 5 that multiply to make the units digit zero.

I hope this could help you.

Answer:

0

Step-by-step explanation:

any multiple of 5 ends in 5 or 0

it cant end in 5 as then it wouldn't be an even number

so its 0

Answer:

$4,400

Step-by-step explanation:

Key: B stands for balance.

b+308=4708

b=4,708-308

b=$4,400

Answer:

A. A rotation of 72º around the center, point D.

C. A reflection across line b through one vertex, the center d.

E. A reflection across line c, and the midpoint of the opposite side

Step-by-step explanation:

From Euclidean Geometry we get that sum of internal angles inside a polygon equals 360º and there is the following relationship in regular polygons:

[tex]\theta = \frac{360^{\circ}}{n}[/tex] (Eq. 1)

Where:

[tex]\theta[/tex] - Internal angle, measured in sexagesimal degrees.

[tex]n[/tex] - Number of sides, measured in centimeters.

If we know that [tex]n = 5[/tex], then internal angle of regular pentagon is:

[tex]\theta = \frac{360^{\circ}}{5}[/tex]

[tex]\theta = 72^{\circ}[/tex]

In consequence, rotating the regular pentagon 72º around the pentagon carries the figure onto itself due to angular symmetry. (Correct answer: A)

By adding any line passing the center of the regular pentagon (i.e. line cc', line bb'), which is collinear to any vertex and any point of the figure, we guarantee conditions of length symmetry so that reflection carries the figure onto itself. (Correct answers: C, E)

Answer:

Step-by-step explanation:

Thank you

Answer:

Is this a joke?

Step-by-step explanation:

Answer:

y = 7

Step-by-step explanation:

First, find the value of x.

[tex] (12x + 9) + (8x + 11) = 180 [/tex] (linear pair)

Solve for x

[tex] 12x + 9 + 8x + 11 = 180 [/tex]

Collect like terms

[tex] 12x + 8x + 9 + 11 = 180 [/tex]

[tex] 20x + 20 = 180 [/tex]

Subtract 20 from both sides

[tex] 20x + 20 - 20 = 180 - 20 [/tex]

[tex] 20x = 160 [/tex]

Divide both sides by 20

[tex] \frac{20x}{20} = \frac{160}{20} [/tex]

[tex] x = 8 [/tex]

Thus,

[tex] (12x + 9) = (14y + 7) [/tex] (vertical angles)

Plug in the value of x, and solve for y

[tex] 12(8) + 9 = 14y + 7 [/tex]

[tex] 96 + 9 = 14y + 7 [/tex]

[tex] 105 = 14y + 7 [/tex]

Subtract 7 from each side

[tex] 105 - 7 = 14y + 7 - 7 [/tex]

[tex] 98 = 14y [/tex]

Divide both sides by 14

[tex] \frac{98}{14} = \frac{14y}{14} [/tex]

[tex] 7 = y [/tex]

Answer:

150 centimeters

it will be 150 centermeter

Uhdfburfuruhd

Answer:

We can be sure that the actual distance lies between 11.65 and 11.74

Step-by-step explanation:

Here. we are told that the odometer measures to the nearest tenth.

The nearest tenth means to the nearest first digit after the decimal point

So the range of values we shall be writing will be the range that includes the smallest number that can be approximated to 11.7 and the largest number that can be approximated;

Thus, we have;

11.65 to 11.74

The reasoning is because the smallest number that can be approximated to 11.70 is 11.65 while the largest that can be approximated to 11.70 is 11.74. So the actual distance we need from the odometer is between 11.65 and 11.74

Answer:

sorry

Step-by-step explanation:

Answer:

It's dez

Step-by-step explanation:

Ask me what's dez

Answer:

10

Step-by-step explanation:

you can cross multiply.

[tex]\frac{12}{15}=\frac{8}{k}[/tex]

after you cross multiply:

12k=120

k=10

Answer:

35

Step-by-step explanation:

The area of given figure is, 35 meter².

A rectangle is a two dimension figure with 4 sides, 4 corners and 4 right angles. The opposite sides of the rectangle are equal and parallel to each other.

We have to given that;

The figure is shown in figure.

Now, We know that;

⇒ Area of rectangle = Length × Width

So, The area of figure is,

⇒ 9 × 3 + (7 - 3) × 2

⇒ 27 + 4 × 2

⇒ 27 + 8

⇒ 35 meter²

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