Hiya! Can you guys help me? For all the four questions? It would mean a lot to me, thank you! I also ask if you guys can explain the steps! Thanks. <3

Answer:

The output when x = -9 is f(x) = 187.

Step-by-step explanation:

We are given a function and asked to find the output of that function.

Our standard function is in the form of a quadratic equation.

[tex]ax^2+bx+c=0[/tex]

Let's check for a change in the presentation of the first value in the equation.

[tex]\bold{f(x)} = 2x^2 - 5x - 20\\\\\bold{f(-9)}[/tex]

We see that x becomes -9. We also know that from conventional algebra, we need to make this change throughout the entire equation. Therefore, since we changed the x in f(x), we need to change it in 2x² - 5x - 20 as well.

[tex]f(-9) = 2(-9)^2 - 5(-9) - 20[/tex]

Now, it's time to simplify this function. Let's first simplify the first term of the function: [tex]2(-9)^2[/tex].

Let's follow PEMDAS in order to simplify the term.

P - Parentheses

E - Exponents

M - Multiplication

D - Division

A - Addition

S - Subtraction

When using this acronym, make sure that all operations are performed left to right.

We see that -9 is raised to the power of 2, so we square -9. Otherwise, we carry out the following operation.

[tex]-9 \times -9 = 81[/tex]

Then, we see that 2 is multiplied into this value. Therefore, we multiply 81 by 2.

[tex]81 \times 2 = 162[/tex]

Now, we need to subtract the product of 5 and -9.

[tex]5 \times -9 = -45[/tex]

[tex]162 - - 45 = 207[/tex]

Finally, we subtract 20 from this value.

[tex]207 - 20 = 187[/tex]

Therefore, the value of f(-9) is 187.

[tex] \sf f(x) = 2 {x}^{2} - 5x - 20[/tex]

[tex] \sf f( - 9)[/tex]

[tex] : \implies \sf f( - 9) = [2 \times( { - 9}^{2} )]-[ 5 \times - 9] - 20[/tex]

[tex] : \implies \sf f( - 9) = 2 \times 81 + 45 - 20[/tex]

[tex]: \implies \sf f( - 9) = 162 + 45 - 20[/tex]

[tex] : \implies \sf f( - 9) = 207 - 20[/tex]

[tex]: \implies \bf f( - 9) = 187[/tex]

Answer:

Step-by-step explanation:

i took the test hope this helps

Answer:

The Height of an Average Door is about 80 Inches. So it is 7 Feet

Step-by-step explanation:

Converting 7 feet into Inches it becomes 84, which is the closet to a standard door.

Answer:

-6tu

Step-by-step explanation:

Answer:

150 is the answer.......

[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]

Actually Welcome to the Concept of the linear pair.

Applying it we get as,

==> PQR + RQS = 180°

hence angle PQR = 150°

Answer:

9

Step-by-step explanation:

so we know that its a right triangle and 8 and [tex]\sqrt{17}[/tex] are not the hypotenuse.

the equation for this is [tex]a^{2}[/tex]+[tex]b^{2}[/tex]=[tex]c^{2}[/tex] with c being the hypotenuse.

[tex]8^{2}[/tex]+[tex]\sqrt{17} ^{2}[/tex]=[tex]c^{2}[/tex]

64+17=[tex]c^{2}[/tex]

81=c

[tex]\sqrt{81}[/tex]=c

9=c

Answer:

Step-by-step explanation:

To make the use of Pythagoras's theorem clear

[tex]C^{2}[/tex] = [tex]A^{2}[/tex] + [tex]B^{2}[/tex]

where C is they hypotenuse or Hyp

A is one side often called  the Adjacent side

B is the other side often called the Opposite side

when A = 8

and B = [tex]\sqrt{17}[/tex]

then

[tex]C^{2}[/tex]  = [tex]8^{2}[/tex] + [tex]\sqrt{17} ^{2}[/tex]

[tex]C^{2}[/tex] = 64 + 17

[tex]C^{2}[/tex] = 81

C = [tex]\sqrt{81}[/tex]

C = 9

Answer:

ill try what's the problem???

Step-by-step explanation:

Answer:

16x+21

Step-by-step explanation:

Answer:

hour hand = 7.5 x 2 for the diameter. C = 2(pi)(15) = approx. 94 centimeters. Minute hand = 9.5 x 2 = 19, C = 2(pi)(19) = approx. 119 centimeters

Step-by-step explanation:

Answer:

the answer is 4500

Step-by-step explanation:

Answer:

He Bought 4,500 Grams of Cream Cheese.

Step-by-step explanation:

Answer:

199

Step-by-step explanation:

49 + 64 + 81 - 36 +25+16

194 - 36 +25 + 16

-36 + 25 + 16

= -11 + 16 = 5

194 + 5 = 199

Answer:

V = πr²h

Step-by-step explanation:

r = radius of circle

h = height of cylinder

Step-by-step explanation:

The formula for the volume of a cylinder is V=Bh or V=πr2h . The radius of the cylinder is 8 cm and the height is 15 cm. Substitute 8 for r and 15 for h in the formula V=πr2h . ... Therefore, the volume of the cylinder is about 3016 cubic centimeters.

Answer:

They shared $1050.

Step-by-step explanation:

Divide 450/3 = 150

150 * 4 = 600

If Tim gets $450, then Jude will get $600.

450 + 600 = 1050

If Tim gets $400, then Jude will get $600.

Answer:

rhombus

Step-by-step explanation:

Answer:

(-1, -5)

Step-by-step explanation:

That is the intersection point of the two equations when put on a graph.

See picture

Answer:

sorry

Step-by-step explanation:

Answer:

$3,685.9

Step-by-step explanation:

Answer:

15.2

Step-by-step explanation:

1) First, add all of the numbers together. 1+5+7+9+11+16+18+20+30+35=152.

2) Then, divide this by the amount of numbers. There are 10, so it is 152÷10=15.2

3) The answer is 15.2

X = 16

7 x + 14 - 6 x = 30

x + 14 = 30

Answer:

x+7

Step-by-step explanation:

idek kinda thought that was obvious but who know I could be wrong

The algebraic expression for the verbal expression x more than 7 will be x + 7.

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

PEMDAS rule means for the Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This rule is used to solve the equation in a proper and correct manner.

The algebraic expression for the verbal expression x more than 7 will be

The numbers will be x  and 7. And the sum of the numbers x and 7 will be given as,

⇒ x + 7

The algebraic expression for the verbal expression x more than 7 will be x + 7.

More about the Algebra link is given below.

https://brainly.com/question/953809

#SPJ2

Answer:

The perimeter of a rectangle is equal to 2L + 2W, where L = the length of the rectangle and W = the width of the rectangle. So, one equation is

2L + 2W = 60

From the info given in the problem, we also know that L = 4W. Therefore, we can use the Substitution Method to re-write the first equation as:

4W + 2W = 60

You should be able to solve this equation for W. Once you find W, you can then calculate L.

Step-by-step explanation:

Answer:

10 is the GCF

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

Answer:

x=-2

Step-by-step explanation:

Substitute y=5x+7 into the equation 3x+y=-9

So you will have, 3x+5x+7=-9

3x+5x=8x

8x+7=-9

8x+7-7=-9-7

8x=-16

x=-2

Answer:

three thousand dollars

Step-by-step explanation:

you round up to 3000

Step-by-step explanation:

1. Given,

Side of the cube = 9 cm

Therefore, volume of the cube = side × side × side

= 9cm × 9cm × 9cm

[tex] = 729 {cm}^{3} (ans)[/tex]

2. Given,

Length of the rectangle = 4cm

Breadth of the rectangle = 3cm

Therefore, perimeter of the rectangle = 2(l+b)

= 2(4cm + 3cm) = 2 × 7cm = 14 cm (Ans)

3. Given,

Side of a square = 11 m

Therefore, area of the square = side × side

= 11 m × 11 m

[tex] \: = {121cm}^{2} (ans)[/tex]

4. Given,

Length of the rectangle = 14 m

Width of the rectangle = 5 m

Therefore, area of the rectangle = l × b

= 14 m × 5 m

[tex] = 70 {m}^{2} (ans)[/tex]

5. Given,

Side of the equilateral triangle = 15 cm

Therefore, perimeter of the triangle = 3 × side

= 3 × 15 cm = 45 cm (Ans)

Answer:

I think 2

Step-by-step explanation:

10x=20

20 divided by 10= 2

Answer:

103°

Step-by-step explanation:

The total angle in a nonagon is 1260. To get the missing angle, we add up all the given angle together and subtract it from 1260.

138 + 154º + 145° + 132° + 148° + 143 + 147 + 150 = 1157

1260 - 1157 = 103

Therefore, the missing angle is 103°

Answer:

Luster describes the reflection of light off a mineral's surface. Mineralogists have special terms to describe luster. Minerals that are opaque and shiny, such as pyrite, have a metallic luster.

Step-by-step explanation: