f(x)=-x2+8x-1 find f(3) show work

Answer:

[tex]\boxed{x=4}[/tex]

Step-by-step explanation:

[tex]2(6x+1)=14x-6[/tex]

→ Expand brackets on left side

[tex]12x+2=14x-6[/tex]

→ Minus 14x from both sides to collect the x terms

[tex]-2x+2=-6[/tex]

→ Minus 2 from both sides to isolate 2x

[tex]-2x=-8[/tex]

→ Divide both sides by -2 to isolate x

[tex]x=4[/tex]

Answer:

4=x

Step-by-step explanation:

2(6x+1)=14x-6

12x+2=14x-6

+6+2=14x-12x

8=2x

4=x

Answer:

13.7

Step-by-step explanation:

I just did the problem

Answer:

Well if you are trying to say if they are the same then no

Step-by-step explanation:

-33≠-13

Hope this helps!

Answer:

option a is correct thanx

I Hope this Helps You?

What is the volume of this right cone? 40π cm³ 300π cm³ 400π cm³ 480π cm³

✓ The answer is 400pi because the area of a cone is A=1/3*pi*r^2*h1/3*pi*100*12 = 400pi

The height of each individual cracker is one-eighth inch. Then the correct option is B.

It deals with the size of geometry, region, and density of the different forms both 2D and 3D.

A type of cracker, rectangular in shape, is stored in a vertical column with all of the crackers stacked directly on top of each other.

Each cracker measures 2 inches in length by one and one-half inches in width.

The volume of the column is 15 inches cubed.
If there are 40 crackers in the column

The height of the cracker will be

[tex]\rm h = \dfrac{15}{1.5*2}\\\\h = 5[/tex]

The height of each individual cracker will be

[tex]\rm h_c = \dfrac{5}{40}\\\\\\h_c = \dfrac{1}{8}[/tex]

More about the geometry link is given below.

https://brainly.com/question/7558603

Answer:

Step-by-step explanation:

is the answer

Answer:

$9.28 per t-shirt

Step-by-step explanation:

plz mark brainlest

Answer:

He has enough money to buy 9 t-shirts and he would have 2 dollars left over

Step-by-step explanation:

Divide 65 by 7. You would get 9 with a remainder of 2. So you have enough to buy 9 t-shirts.

Answer:

25

Step-by-step explanation:

40/8 = 5

3:5 so u do 5x5 which is 25

brief explanation and hoped it helped xoxo

Answer:

25 girls

Step-by-step explanation:

boys: girls: total

3           5       8

Take the total number of students and divide by 8

40/8 = 5

Multiply each term by 5

boys: girls: total

3*5     5*5    8*5

15         25     40

There are 25 girls

Answer:

1:0.33

Step-by-step explanation:

This is because one foot= .333 yards

I hope this is what you were asking! :)

Answer:

16 + 64 + 64 are the 3 sides.

Step-by-step explanation:

There are two sides that are 4 times the third side.

Let the 3rd side = x

4x + 4x + x = 144 inchines

9x = 144 inches

x = 144/9

x = 16 inches.

So the base (which is the smallest side) = 16 inches.

One of the two sides remaining is 4x = 4*16 = 64

The other side = 64

Check

64 + 64 + 16 = 144 as it should.

Answer:

Step-by-step explanation:e

Answer:

True

Step-by-step explanation:

If I am incorrect in my reasoning, please let me know so that I can plan better for my future answers. Have an amazing day.

Answer:

could be plus ten and that gives u 49

Step-by-step explanation:

Answer:

1. 90 degrees because of supplementary angles

2. 180 degrees

3. 90 degrees

4. 37 degrees, since the sum of the interior angles add to 180, 180-90-53 = 37.

5. 127 degrees, supplementary angles 180-53

6 . 23 degrees, use the triangle sum theorem 180-30-127

Answer:

198

Step-by-step explanation:

3x11x6=

Answer:

nothing wbuuuu

Step-by-step explanation:

Answer:

Hey

Step-by-step explanation:

How are you doing???

Answer:

Step-by-step explanation:

[tex]\cfrac{9}{x}~~ = ~~\cfrac{x}{18}\implies 162=x^2\implies \sqrt{162}=x\implies \sqrt{9^2\cdot 2}=x\implies 9\sqrt{2}=x[/tex]

Answer:

Hello

=4/5-1/4

Taking LCM,

LCM=20

=4*4/5*4 - 1*5/4*5

=16/20-5/20

=11/20

Answer:

11/20

Step-by-step explanation:

Answer:

20

Step-by-step explanation:

heart and brainliest pls

Answer:

18

Step-by-step explanation:

you have to do parentheses first, then division. Then you can subtract because of the order of operations, PEMDAS, which is parentheses, exponents, multiplication or division, and addition or subtraction. After you do the equation you get 12. That is 6 less than Becka's age, making Becka's age 6 more than that, which is 18

Answer:

Lucas will walk [tex]1\frac{3}{4}[/tex] miles if he takes route B

Step-by-step explanation:

Length of route A = [tex]2 \frac{1}{8} miles[/tex]

Length of route A [tex]=\frac{17}{8} miles[/tex]

We are given that route A is 3/8 mile longer than route B

Let b be the length of route B

So, [tex]b+\frac{3}{8} =2 \frac{1}{8} \\b+\frac{3}{8} =\frac{17}{8}\\b=\frac{17}{8}-\frac{3}{8}\\b=\frac{14}{8}\\b=\frac{7}{4}\\b=1\frac{3}{4}[/tex]

Hence Lucas will walk [tex]1\frac{3}{4}[/tex] miles if he takes route B

Answer:

Rational.

Step-by-step explanation:

It can be represented as a fraction

The mass of the substance left after 12 days is 501.51g.

Data;

This is defined as the time taken for the radioactive sample to decay to half it's initial size.

This is given as

[tex]T_\frac{1}{2} = \frac{\ln 2}{\lambda}[/tex]

where

Let's substitute the values and find the disintegration constant

[tex]T_\frac{1}{2} = \frac{\ln 2}{\lambda} \\4 = \frac{0.693}{\lambda} \\\\\lambda = \frac{0.693}{4}\\ \lambda = 0.17325[/tex]

But the value of a radioactive substance present at a given time is

[tex]N_t = N_o e^-^\lambda ^t[/tex]

Let's substitute the values and solve.

[tex]N_t = 7600 e^-^0^.^1^7^3^2^*^1^2\\N_t = 7600 * 0.065988\\N_t = 501.509g[/tex]

The mass of the substance left after 12 days is 501.51g.

Learn more on radioactivity here;

https://brainly.com/question/2320811

Answer:

oh hun is 640kg stupid cow

Step-by-step explanation:

Answer:

3 boxes.

Step-by-step explanation:

Solution,

Given,

The number of cookies : 7 × 5 = 35

Now,

The total number of cookies to cookies per box 35 ÷ 12 = 2.9 box

= 3 boxes.

Answer/Step-by-step explanation:

Given;

A store pays $3 for a magazine.

The markup is 5%.

Solve:

$3 × 5% = 0.15      [Markup Price]

$3 + 0.15 = $3.15 [Final Price]

Hence, the total is $3.15.

~Learn with Lenvy~

I attached to pictures, one of me solving the equation for you step by step and then what the graph should look like when i put it in my calculator!!

Answer:

They don't have enough money to pay the full price so they have no option but to pay what they have in their saving account. Also as a first down payment its allowed to start from 3% and up. The much down payment the lower they will pay every month.

Step-by-step explanation:

Answer: No solutions

Step-by-step explanation:

|x|+5<1

Subtract 5 from both sides.

|x| < -4

No solutions is possible