If f(x) = 2x2 - 9, find f(5).

Answers

Answer 1
f(5) = -25, because you have to solve 2x2 - 9 to get -5, then multiply that by 5 to get f(5) = -25

Related Questions

Simplify the expression.
- (m + 6n - 10)

Answers

Answer:

- m - 6n + 10

Step-by-step explanation:

-(m + 6n - 10)

|

|

v

- m - 6n + 10

go to socrertive and the answer will
Pop up faster then this

Given f(x) = -6(4 - x), what is the value of f(-0.6)?
A)-30
B) -27.6
C) -60
D) -24.6

Answers

Step-by-step explanation:

f(x) = -6(4-x) which f(-0.6)

therefore:

we multiple -6×4= -24 and -×- =+ this implies +6×x = 6x

we add:

-24 + 6x which we already know x is = -0.6

-24 + 6 (-0.6)

-24 + 3.6

= the big number always carry the sign

the answer is = -27.6

My age is 9 years, My sister was half of my age. Now I'm 49 years, How old is my sister?

Answers

Answer:

24.5 so 24 and a half .....

A grocer reports that the store has sold 72 of the 90 boxes of apples delivered this week. What percentage of the delivered apples have been sold?

Answers

Answer:

80%

Step-by-step explanation:

Total boxes of apples delivered = 90

Total boxes sold = 72

What percentage of the delivered apples have been sold?

Percentage sold = Total boxes sold / total boxes delivered × 100

= 72 / 90 × 100

= 0.8 × 100

= 80%

The percentage of the delivered apples have been sold is 80%

Percentage unsold = (total boxes delivered - total boxes sold) / total boxes delivered × 100

= (90 - 72) / 90 × 100

= 18 / 90 × 100

= 0.2 × 100

= 20%

The percentage of the delivered apples have been sold is 80% and this can be determined by using the unitary method.

Given :

A grocer reports that the store has sold 72 of the 90 boxes of apples delivered this week.

The following steps can be used in order to determine the percentage of the delivered apples that have been sold:

Step 1 - The unitary method can be used in order to determine the percentage of the delivered apples that have been sold.

Step 2 - According to the given data, 90 boxes are 100% boxes of apples.

Step 3 - Now, let the percentage of the delivered apples that have been sold be 'x'. So, the value of 'x' is:

[tex]x = \dfrac{72}{90}\times 100[/tex]

Step 4 - Simplify the above expression.

[tex]x = 80\%[/tex]

Therefore, the percentage of the delivered apples have been sold is 80%.

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help real answers only please

Answers

Answer:

The three points are

(-2,1)

(-3,2)

(-4,3)

Step-by-step explanation:

These points solve the problem, you could have other points as well such as (-5,4), (-6,7) and so on

How to calculate the area of this?

Answers

Answer:

1601 m²

Step-by-step explanation:

Split the quadrilateral into 2 triangles as pictured

One of them is right triangle with 2 sides known

The third side is the hypotenuse and is:

√(60²+25²) = √4225 = 65 m

Total area is the sum of the areas of the 2 triangles

A= A1 + A2

Area 1

A1 = 1/2*15*60 = 750 m²

Use Heron's formula for the second triangle:

A2 = 1/4√(65 + 64 + 27)(-65 + 64 + 27)(65 - 64 + 27)(65 + 64 - 27) ≈ 851m²

Total area

A = 750 + 851 = 1601 m²

solve 2m + 4m - 3m squared

Answers

Answer:

3m^2

Step-by-step explanation:

i hope this helps!! :)

Whats would be the closest answer to this question

Answers

Answer:

KM

JK

PK

MJ

i hope this helps

2, 1, 2 unlike these people i actually did it. edge

Answers

Answer:

waitttt what do u mean?

Hold up what do u mean?

una dintre fetele laterale ale unei piramide patrulatere regulate este triunghi echilateral cu latura de 7cm. Calculati aria bazei piramidei consideratei

Answers

Answer:

21.27 cm^2

Step-by-step explanation:

Pentru a calcula aria bazei, putem folosi formula lui Heron Matematic aceasta este;

A = √s (s-a) (s-b) (s-c)

Unde s = (a + b + c) / 2

a, b, c se referă la laturile triunghiului

A = (7 + 7 + 7) / 2 = 21/2 = 10,5

A = √10,5 (10,5-7) (10,5-7) (10,5-7)

A = √10,5 (3,5) (3,5) (3,5)

A = √450.1875

A = 21.2176 cm ^ 2, care este de aproximativ

21.22 cm ^ 2

Solve and show how you did: -2x + (12 - 9) = 2 + 9 + 2x

Answers

Remove parentheses
-2x + 12 - 9 = 2 + 9 + 2x

Simplify -2x + 12 -9 to -2x + 3
-2x + 3 = 2 + 9 + 2x

Simplify 2 + 9 + 2x to 2x + 11
-2x + 3 = 2x + 11

Add 2x to both sides
3 = 2x + 11 + 2x

Simplify 2x + 11 +2x to 4x + 11
3 = 4x + 11

Subtract 11 from both sides
3 - 11 = 4x

Simplify 3 - 11 to - 8
-8 = 4x

Divide both sides by 4
-8/4 = x

Simplify 8/4 to 2
-2 = x

Switch sides
x = -2

Seventeen less than one-thrid of a number y.​

Answers

Answer:

In the explanation. :)

Step-by-step explanation:

1/3x-17y

Hope this helps. Have a great day!

Use the LCD to rewrite
4/7 and 3/10 with the same denominator

Answers

I need help too ;-; some one plsssssssss

A fraction represents a part of a whole.40/70, 21/70 are the same fractions like 4/7 and 3/10 with same denominator.

What is a fraction?

A fraction represents a part of a whole

We need to write 4/7 and 3/10 with the same denominator

The given fractions are 4/7 and 3/10

in 4/7

If numerator and denominator is multiplied with 10

4/7*10/10

we get

40/70

i.e 4/7=40/70

Now

in 3/10

If numerator and denominator is multiplied with 10

3/10*7/7

we get

21/70

i.e 3/10=21/70

Therefore 4/7=40/70 and 3/10=21/70 are two fractions with same denominator.

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M is the midpoint of CT. CM = 2x + 8 and MT = 4x + 2, the length of CT.

Answers

Answer:

CT= 28

Step-by-step explanation:

I attached an image below to show you how I got to that answer. I hope this helps!

7. Movers, Not Shakers moving company charges $800 plus $16 per hour. Hernia Movers
charges $720 plus $21 per hour.

a. After how many hours, h, would the two moving companies cost the same amount?




b. What would that amount be?

Answers

Answer:

a.16

b.1056

Step-by-step explanation:

a. So we know that Not Shakers charges 800 dollars  + 16 per hour, so we can call that 800 + 16h. We also know that Hernia Movers charges 720 dollars + 21 per hour, so we can call that 720 + 21h.

Now in order to find when they will have the same amount, we have to solve for h.

Equation:

800 + 16h= 720+21h

800=720+5h

5h=80

h=16

The two companies will have the same amount after 16 hours.

b. Now we have to find that amount, so all we have to do is replace h with 16. so 720 + 21(16) = 1056.

Therefore, the amount will be 1056 dollars.


A plumber charges $25 for a service call and $50 per hour of service.
Write an equation for the cost, c, after h hours of service. If a plumber
spent 3 and a half hours at my house, how much is my bill?
Equation:
Answer:

Answers

Answer:

25+50h=c

$200 is the your bill

Step-by-step explanation:

50×3.5=175

175+25=200

10 points
The original cost of a shirt is $12. The markdown rate or discount rate is
40%. What is the selling price? *

Answers

4.80 ....................

Answer:

$7.2

Step-by-step explanation:

First, look at the discount. It's 40%.

Next, I look at the price. It's $12.

100-40 is 60.

60/100 (60%) times 12 is equivalent to 7.2. Enjoy :D

I'll give you 100 points if you answer this correctly!!

Make a table of ordered pairs for the equation.

y=−1/3x+4

Then plot two points to graph the equation.

Answers

Let's pose x as 0, 1, 2, and 3, substituting for y to receive the "ordered pairs"

y = - 1/3(0) + 4 = 0 + 4 = 4

y = - 1/3(1) + 4 = - 1/3 + 4 = - 1/7

y = - 1/3(2) + 4 = - 2/3 + 4 = 10/3

y = - 1/3(3) + 4 = - 1 + 4 = 3

Table of ordered pairs:

x | y

0 | 4

1 | - 1/7

2 | 10/3

3 | 3

Answer:

one point is at (0,4) and the other is (3,3)

Step-by-step explanation:

I took the k12 test

A hiker walks 11 km due north from camp and then turns and walks 11 km due east. What is the magnitude of the displacement (on a straight line) of the hiker from the camp?

Answers

Answer:16

Step-by-step explanation:

Answer:22 km

Step-by-step explanation:

.Un baúl de 10,5 kg está apoyado en el suelo.Si se tira de él verticalmente hacia arriba con una fuerza de 52,9 N, determina el valor de lanormal.

Answers

Respuesta: 50N

Explicación paso a paso:

Dado lo siguiente:.

Tensión (T) = 52,9 N

Masa (m) = 10,5 kg

La normal se obtiene usando la relación:

N = mg - T; donde N = normal, g = aceleración debida a la gravedad (9,8 m / s²)

N = mg - T

N = (10,5 * 9,8) - 52,9

N = 102,9 - 52,9

N = 50 N

Answer:

hey ¿How are you?

Step-by-step explanation:

bye

Some1 help with the congruence statement plz

Answers

Answer:

It would be rotation what do u mean by congruent statement? Angles? B is congruent to D A IS CONGRUENT TO e

Step-by-step explanation:

Solve for x (PLEASE HELP)

A. x=3.5
B x=6.25
C x=8
D x=8.5

Answers

Answer:

[tex]12 + 2x + 1 = 90 \\ 12 + 1 + 2x = 90 \\ 13 + 2x = 90 \\ 2x = 90 - 13 \\ 2x = 77 \\ x = 38.5[/tex]

this is the best I can try to do

Which phrase should be inserted on the line to make a true statement? Use the models to help.

picture 1 picture 2



is greater than
is less than
cannot be compared to
is equal to

Answers

Answer:

Is Equal to

Step-by-step explanation:

2/3 = 8/12

2/3 = 4/6

2/3 = 2/3

PLZZZZZZ HURRRRYYYYY Why did Allan Bakke file a lawsuit? His medical test application was incorrectly scored. He was an advocate of affirmative action. His test scores were lower than minority students. He felt he was denied admission to school based on race.

Answers

Answer: The answer is D

Allan Bakke filed a lawsuit because he felt he was denied admission to school based on race.

What is a Lawsuit?

This is defined as a case in a court of law which concerns a dispute between two people or organizations.

Allan Bakke was a White and his score was higher than some minority applicants and was denied admission which made him sue the school, University of California. The case led to desegregation in all public schools thereby making option D the most appropriate choice.

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How to solve this one step inequality

Answers

Answer: add 1 to both sides

             -1+r+1≥4+1

              simplify

               x≥5

Step-by-step explanation:

A book has 240 pages and each day 10 pages are
read. The number of pages left, p, is given as a
function of d, the time in days, where
p = 240 – 10d . Graph the equation, then use its
x-intercept to determine when the book will be
finished?

Answers

Answer:

24 days is the answer

Step-by-step explanation:

If the book is 240 pages and each day 10 pages are read you could easily divide 240 by 10 and get 24.   However, you need to use the formulas for your answer I suppose.  So, to get the  x-intercept this is what you do.  You have to use the slope-intercept form y = mx+b  where m=-10 and b = 240 so you end up with y = -10x+240

So now you solve for x-intercept

0 = -10d+240

subtract 240 from both sides so       0 = -10d + 240

                                                         -240              -240

you are left with -240 = -10d.  Now simplify and divide each term by -10     -240/-10 = 24 and -10d/-10 = d

   you are left with d = 24 or 24 = d

You graph the equation by placing a point at  240 on the y axis and 24 on your X-axis.

6≥−6(a+2) solve and find the awnser

Answers

Answer:

[tex] - 3 \geqslant a[/tex]

Step-by-step explanation:

[tex]6 \geqslant - 6(a + 2)[/tex]

distribute -6 inside the parentheses

[tex]6 \geqslant - 6a - 12[/tex]

add 12 to both sides

[tex]18 \geqslant - 6a[/tex]

divide by -6 to isolate the variable

[tex] - 3 \geqslant a[/tex]

Answer:

-3<=a

Step-by-step explanation:

1. Get the -6 away, so multiply everything by -6.  6*-6 >= -6*-6(a+2)

2. This becomes -1 <= a+2   Since if you multiply or divide anything by a negative number, you have to reverse the inequality sign.

3. Subtract 2 to get a by itself    -1-2 >= a

4. This becomes -3 >= a   which is the right answer.

(Just so you know >=  and <=  means less than or equal to and more than or equal to.)  

Tiffany tried to solve an equation step by step.
h
0.5
=
7
h
0.5

0.5
=
7
0.5
Step
1
h
=
14
Step
2

0.5
h


0.5
h

⋅0.5
h


=7
=
0.5
7


=14


Step 1
Step 2


Find Tiffany's mistake.
Choose 1 answer:

Answers

Answer: step 1

Step-by-step explanation:

Answer:

Tiffany's mistake is step one.

Step-by-step explanation:

Sylvi says 15.4375 ÷ 3.25 = 4.75 exactly. Which of these shows that she is correct?

a: 15 / 3= 5
b: 15.4375 ÷ 5 = 3.0875
c: 4.75 x 3.25 = 15.4375
d: 3.25= 3 1/4 and 4.75 = 4 3/4
​​

Answers

Answer:

Step-by-step explanation:

its c don't pick any other answers only c

According to the operation done by Sylvi, the correct expression is 4.75 × 3.25 = 15.4375. Hence, option (c) is correct.

What is an arithmetic operation?

The four fundamental operations of arithmetic are addition, subtraction, multiplication, and division of two or more numbers. Included in them is the study of integers, especially the order of operations, which is important for all other aspects of mathematics, notably algebra, information management, and geometry.

As per the operation given in the question,

15.4375 ÷ 3.25 = 4.75

As per the rules, if a number is in the division on the left-hand side, after going to the right-hand side it will become in the form of multiplication with another number.

Then,

4.75 × 3.25 = 15.4375.

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What is the value of b in the equation

Answers

Answer:

b = - 6

Step-by-step explanation:

Using the rules of exponents

[tex](a^{m}) ^{n}[/tex] ⇔ [tex]a^{mn}[/tex]

[tex]a^{-m}[/tex] = [tex]\frac{1}{a^{m} }[/tex]

Thus

[tex](y^{b}) ^{4}[/tex] = [tex]y^{4b}[/tex] = [tex]\frac{1}{y^{24} }[/tex] = [tex]y^{-24}[/tex], then equating the exponents

4b = - 24 ( divide both sides by 4 )

b = - 6

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