f(x)=2(x-5)(x+7) What is f(-7)​

Answers

Answer 1

Answer:

f(- 7) = 0

Step-by-step explanation:

Substitute x = - 7 into f(x) , that is

f(- 7) = 2(- 7 - 5)(- 7 + 7)

       = 2 × - 12 × 0

      = - 24 × 0

     = 0


Related Questions

Which equation shows the quadratie formula used correctly to solve 7x? = 9+X for x?

Answers

Exact form niya is ung pang c

last answer(4 )

x=7x^2-x-9

The temperature was -6° Fat 8:00 AM, over the next 6 hours, the temperature rose 11°. What is the new temperature at 2 PM?​

Answers

Answer:

5 degrees Fahrenheit

Step-by-step explanation:

-6 + 11 = 5

The scale drawing at right shows the first slope of a house, the actual dimensions of the garage are 20 feet by 25 feet. All angels are right angels.

A. how many feet does each inch represent? That is, what is the scale?

B. What are the length and width of the living room on the scale and drawing( in inches)?

C. What are the actual length and width of the living room( in feet)?

D. if the family wants to lay carpet in the living room and carpeting cost $1.25 per square foot, how much will carpet cost

Answers

Answer:

See below

Step-by-step explanation:

A)

According to dimensions of the garage, the scale is:

1 in : 20 ft, as the width of the garage is 20 ft and on paper is 1 in

B)

Living room

Dimensions on paper:

2 in x 1 1/4 in

C)

Actual dimensions:

2*20 ft = 40 ft and1 1/4 * 20 ft = 25 ft

D)

The area of the living room:

A = lw = 25*40 = 1000 ft²

Cost of carpet:

1000*$1.25 = $1250

Length

20(2)=40ft

Width

1.25(20)25ft

Area

25(40)1000ft²

Total cost

1000(1.25)$1250

plzzzzzz help meeeee​

Answers

Answer:

Step-by-step explanation:

For A, 7x=21, it is asking, 7 multiplied by what number is 21? We can try to figure it out. Let's start with 0.

7(0)≠21

Then 1.

7(1)≠21

7(2)≠21

7(3)=21

Therefore, for question a, the answer is 3.

For question b, it's asking 6 minus what is 2.

With this one, we can say it is 4, since 6-4=2.

Now moving on to B.

a) 2x+4=16

We need to isolate x in order to find it's value.

So we can begin with subtracting 4 from both sides, getting us:

2x=12

Then, if we divide both terms by 2, we get x.

x=12/2

x=6.

b)

3 x (z/4)=9

Again, we need to isolate z.

So, we multiply both sides by 4, getting us

3z=36

then we divide by 3

z=36/3

z=12

c) 16-x=2

Here we simply subtract 16 from each side, then flip the signs to get positive x.

So, 16-x=2

-x=-14

x=14

d) 4k=20

This is essentially asking, 4 times what number is 20?

So we can divide both sides by 4 and get

k=20/4

k=5

Can Somone plsss help me

Answers

Answer:

from tjwuxrsnsu hshwjdysgw ehsshejisgwnd jrsysjsgshd

from pressure to balance is the answer i think

in the adjoining graph the point a is the position of a policeman in the point p is the position of a Thief how far is the thief from the policeman 1 unit is equal length to 20 m​

Answers

Answer: 5 up and 7 side

Step-by-step explanation:

The price of an item has dropped to $81 today. Yesterday it was $135. Find the percentage decrease.

Answers

Answer:  60%

Step-by-step explanation:

81/135= 60/100

What do I put in the box?? Do I skip count?

Answers

Answer:

skip count by 2 on was and skip count by 6 on the butter

Step-by-step explanation: 2x5=10 6x5=30

the wax 2,4,6,8,10
the butter 6,12,18,24,30

Two dice are rolled. Determine the probability of the following. ("Doubles" means both dice show the same number.)
rolling a 4 or doubles

Answers

Answer:

The answer is 2/9

Step-by-step explanation:

I got it right on the test



4) Which number is a factor
of 24 but not a multiple
of 6?

Answers

The answer is 2,3,4,7
Eight is your answer. Eight is not a multiple of 6 but a factor of 24

Enter an inequality that represents the phrase "the sum of 4 and y is less than 6." Draw a graph that represents the inequality.
Please help AND give a good explanation. Like I am finding this super hard and well I can NOT get this question wrong unless I want a C on this. Help :(

Answers

9514 1404 393

Answer:

  4 + y < 6

  see attached for a graph

Step-by-step explanation:

The English description "the sum of A and B" is written symbolically as ...

  A + B

The symbol for "is less than" is <.

Then "the sum of 4 and y is less than 6" will be written ...

  4 + y < 6

__

The solution to this is found by subtracting 4 from both sides of the inequality:

  4 +y -4 < 6 -4

  y < 2 . . . . . . . . . simplified solution

The graph of this is a number line with an open circle at y=2, and shading to the left of that point, where values on the number line are less than 2.


p(x) = 3(x + 10x + 5) - 5(x - k)

In the polynomial p(x) defined above, k is a
constant. If p(x) is divisible by x, what is the value
of k?

Answers

First, you should simplify the function expression.

 

3(x2 + 10x + 5) - 5(x-k) = 3x2 + 30x + 15 - 5x + 5k = 3x2 +15x +15 +5k

 

In order for the polynomial to be divisible by x, all terms need to divide by x with no remainder.  The first two terms clearly divide by x.  However, the last two do not.  In order for this to work out where k is constant, 5k would have to cancel out the  +15 term, leaving nothing to divide by x.

 

So: 15 + 5k = 0

 

5k = -15

k = -3

Use a graphing utility to graph the equation. Use the graph to approximate the values of x that satisfy each inequality.
y =
1
2
x2 − 2x + 1

Answers

Answer:

25

Step-by-step explanation:

12x2=24-2x+1=25-2x

25-2x=y

    (0)

25=y

Factor the Polynomial
6x3 - 16x2 + 21x - 56

Answers

Answer:

-1190

Step-by-step explanation:

I'm gonna do some sketchy stuff doda doda

the answer is (3x-8) (2x^2+7)

A coin is tossed 10 times, find the probability of getting seven heads.

Answers

Answer:

7/10 or 70%

Step-by-step explanation:

because 10/10 is 100%-----> so 7/10----> 70%

true or false, when graphing a linear Inequality in two variables, the inequality symbol " < " states to use a broken line.

Answers

Answer:

Ture I tink

Step-by-step explanation:

Find the inverse function in slope-intercept form (mx+b)

f (x) = x - 16

f^-1 (x) =

Answers

Answer:

[tex] \rm y = x + 16 [/tex]

Step-by-step explanation:

A function is given to us and we need to write the inverse of the function in slope intercept form . The given function is ,

[tex]\rm\implies f(x) = x - 16 [/tex]

Let ,

[tex]\rm\implies y = f(x)[/tex]

So that ,

[tex]\rm\implies y = x - 16 [/tex]

Interchange x and y ,

[tex]\rm\implies x = y - 16 [/tex]

Solve for y ,

[tex]\rm\implies y = x + 16[/tex]

Now replace ,

[tex]\rm\implies y = f^{-1}(x) [/tex]

We have ,

[tex]\rm\implies f^{-1}(x) = x+16 [/tex]

And in slope intercept form ,

[tex]\rm\implies \boxed{\pink{\frak {y = x +16}}}[/tex]

If F(x) = 12x/(3 + x2), find F '(3) and use it to find an equation of the tangent line to the curve y = 12x/(3 + x2) at the point (3, 3).
F '(3) =
y(x) =

Answers

Answer:

f=12

yx=88

Step-by-step explanation:

please help this is super urgent!!!



Choose the correct description of the graph of the compound inequality: (5 points) 3x + 1 > 7 and 4x less than or equal to 24

Answers

Answer:

A number line with an open circle on 2, a closed circle on 6, and shading in between

Step-by-step explanation:

Given:

3x+1 > 7 → inequality A

4x ≤ 24 → inequality B

Step 1

Solve inequality A

3x+1>7

3x>7-1

x>2

the solution is the interval------> (2,∞)

Step 2

Solve inequality B

4 x ≤ 24

4 ≤ 6

the solution is the interval------> (-∞,6]

Step 3

Find the solution of the compound inequality

Solution A ∩ Solution B

(2,∞) ∩ (-∞,6]=(2,6]

therefore

The answer is A number line with an open circle on 2, a closed circle on 6, and shading in between

Answer:

Your answer would be a number line with an open circle on 2, a closed circle on 6, and shading in between.

Step-by-step explanation:

i.e. it could also be written as:

3x + 1 > 7

3x > 7 - 1

3x > 6

x > 2

And the second inequality is:

4x < 24

4x < 6

Hence, the compound inequality could be represented as:

x>2 i.e. (2,∞)

and x≤6 i.e. (-∞,6]

Hence, the feasible region or the region that is common to both the inequalities is:

(2,6]

Hence, there will be a number line with open circle at 2 since 2 is not included in the domain and a closed circle at 6 and shading in between

A tune-up automotive facility marks up its
parts by 45%. Suppose that the facility
charges its customers $2.03 for each spark
plug it sells. What is the facility's cost for each
spark plug?

Answers

Answer:  $1.40

Work Shown:

x = cost before markup

1.45x = cost after the 45% markup

1.45x = 2.03

x = (2.03)/(1.45)

x = 1.40

3d + 5 where d=3 show work

Answers

Answer:

•Equation => 3d + 5

d = 3

3 x 3 + 5

9 + 5

14 = Answer

Hope it's helpful

Answer:

3d+5=9+5=14

Step-by-step explanation:

3(d)=3*3=9

D=3

+5=14, answer is 14

brainest?

Pleaseeee helpppppppppp

Answers

Answer:

25 ft^2

Step-by-step explanation:

In direct variation, if y varies directly with x, then the equation has the form

y = kx,

where k is the constant of proportionality. y is proportional to x.

Let's call the area y and the distance x.

Here, the area varies with the square of the distance, so the equation has the form

y = kx^2

Here, y is proportional to the square of x.

We can find the value of k by using the given information.

y = kx^2

When x = 20 ft, y = 16 ft^2.

16 = k(20^2)

k = 16/400

k = 1/25

The equation of the relation is:

y = (1/25)x^2

Now we use the equation we found to answer the question.

What is y (the area) when x (the distance) is 25 ft?

y = (1/25)x^2

y = (1/25)(25^2)

y = 25

Answer: 25 ft^2

help and i ill give brainliest

Answers

Answer:

11

Step-by-step explanation:

f(16) = 7 + 16/4

= 7 + 4

= 11

PLS HELP ME I NEED IT

Answers

Step-by-step explanation:

the area = [tex](\frac{1}{2}) (18)(4)\\[/tex] = [tex]36ft^{2}[/tex]

please give me a brainliest answer

Hi please help me i need it

Answers

Answer:

for perimeter, you add all of the sides except the height which is 19. It's means that you add all of the numbers except 19

Whats the answer? ( BRANLIEST )

Answers

Answer:

1/6a - 1/6

Step-by-step explanation:

-2/3a + 5/6a can be simplified:

1. Make a common denominator → -4/6a + 5/6a

2. Simplify '-4/6a + 5/6a' → 1/6a

Answer:

1/6a - 1/6

Answer:

[tex] - \frac{1}{6} (a +1 ) \\ [/tex]

Step-by-step explanation:

[tex] - \frac{2}{3} a + \frac{5}{6} a - \frac{1}{6} \\ - \frac{2 \times 2}{3 \times 2}a + \frac{5}{6} a - \frac{1}{6} \\ - \frac{4a + 5a}{6} - \frac{1}{6} \\ - \frac{1}{6} a - \frac{1}{6} \\ - \frac{1}{6} (a + 1) \\ [/tex]

_+_+_+_+_+_=300,684 how could I do this with 6 digits to equal 300,684 .?

Answers

Answer:

Number 300,684 spell , write in words: three hundred thousand, six hundred and eighty-four . Ordinal number 300684th is said and write: three hundred thousand, six hundred and eighty-fourth. Color #300684. The meaning of number 300684 in Maths: Is Prime? Factorization and dividers. The square root and cube root of 300684. The meaning in computer science, numerology, codes and images, writing and naming in other languages, other interesting facts.

hop it helps:) :(

what are the coorrect ones?

Answers

Answer:

16:18

Step-by-step explanation:

4 * 4= 16

2*4=8

Therefore

The ratio is 16:8

Hope this helps

Have a nice day! :D

Give brainliest if possible pls :)

Can somebody help me as soon as possible !!

Answers

Answer:

C

Step-by-step explanation:

Hope it helps

The correct answer is B because you’d multiply the exponents

Use the number line to find the difference of 3 - (-1.5)

Answers

your answer is 4.5 you're welcome :-)

Answer:4.5

Step-by-step explanation:

the rule is

positive - negative  changes to positive + positive so

3- (-1.5) changes to 3 + 1.5 which equals 4.5

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