HELP PLEASE!!! I WILL
GIVE BRAINLIEST

Step-by-step explanation:

I think there are some typos in a)

anyway, this is a geometric sequence.

that means that after a starting value each new term is created by multiplying the previous term by a certain factor.

a)

s1 = 450

factor f = 2.5

so,

s2 = 450×2.5 = 1125

and so on.

from that we see that

sn = 450×(2.5)^(n-1)

and as

450/2.5 = 180

or

450 = 180×2.5

we can "extract" another 2.5 factor from the basic 450.

so,

sn = 180×2.5×(2.5)^(n-1) = 180×(2.5)^n

b)

s5 = 180×(2.5)⁵ = 17,578.125 or rounded 17578

c)

the question is unclear. are the bacteria of previous generations still there, when a new one is generated ?

then the 2.5 factor creates the sum implicitly, and the total number of bacteria in the first 10 generations is simply the 10th term s10.

s10 = 180×(2.5)¹⁰ = 1716613.76953125 = 1,716,614

or is it meant to sum the numbers of each generation (the old bacteria "go away", when the next generation is generated) ?

the sum of the first n terms of such a geometric sequence is

sum = a1×(1 - f^n)/(1 - f)

so, for our first ten terms

sum = 450×(1 - 2.5^10)/(1 - 2.5) =

= 450×-9535.7431640625/-1.5 =

2860722.94921875 = rounded 2,860,723

Answer:

you are multiplying by 7

Step-by-step explanation:

so like 3 x 7 = 21

4 x 7 = 28

6 x 7 = 42

9 x 7 = 63

10 x 7 = 70

hope it helps

7,9

Step-by-step explanation:

3x4=21

4x7=28

6x7=42

9x7=64

10x7=70

Answer:

y=3/4x+2

Step-by-step explanation:

Idont know how to graph on brainly

Answer:

z=7

Step-by-step explanation:

Combine like terms: 2z=14

Reduce the greatest common factor on both sides of the equation z=7

answer: z= 7

Answer:

z = 7

Step-by-step explanation:

6z + z - 4z + 4z - 5z = 14

Collect like terms

6 + 1 - 4 + 4 - 5

-4 and 4 cancel out each other so remove it from the equation

6 + 1 - 5 = 2

2z = 14

Divide by 2 to isolate z

z= 7

Answer:

[tex]y=2x+1[/tex]

Step-by-step explanation:

Use the formula [tex]y=mx+b[/tex]

Switch out any number for '[tex]m[/tex]' and for '[tex]b[/tex]' and your input would be '[tex]x[/tex].'

Just make sure your '[tex]m[/tex]' is larger than your '[tex]b[/tex].'

An example could be, [tex]y=2x+1[/tex]

Answer:

y = -3x - 12

Step-by-step explanation:

Lines that are parallel have the same gradient.

Therefore using the point (-2,-6) you can make your own equation.

-6 will be y, -2 will be x

All you have to do is find the y-intercept which is C in y=mx+c

-6 = -3(-2) + c

-6 = 6 + c

-12 = c

Therefore;

y = -3x - 12

Answer:

a) -2

b) -5

Mark me bailiest

Answer:

Ask me things ill try my best!

Answer:

1] She would not have to change a diaper, they said. In fact, she would not have to do anything at all. Mrs. Winter said that Charles would not wake while she and Mr. Winter were out at the movies. He was a very sound sleeper, she said. No need to have a bottle for him or anything. Before the Winters left they said absolutely please not to look in on the sleeping baby because the door squeaked too loudly.  

[2] Harriet had never held a baby, except for one brief moment, when she was about six, when Mrs. Antler next door had surprisingly bestowed¹ on her the tight little bundle that was their new baby, Andrea. Harriet had sat very still and her arms had begun to ache from the tension by the time Mrs. Antler took back her baby. Andy was now a plump seven-year-old, older than Harriet had been when she held her that day.  

[3] After two hours of reading all of the boring mail piled neatly on a desk in the bedroom and looking through a depressing wedding album filled with photographs of dressed-up people in desperate need of orthodonture² (Harriet had just ended two years in braces and was very conscious of malocclusion³ issues) while flipping channels on their television, Harriet turned the knob on the baby's door very tentatively, but it seemed locked. She didn’t dare turn the knob with more pressure because what if she made a noise and woke him and he started to cry?  

[4] She stood outside the door and tried to hear the sound of a baby breathing but she couldn’t hear anything through the door but the sound of the occasional car that passed by on the street outside.  She wondered what Charles looked like. She wasn’t even sure how old he was. Why had she agreed to baby-sit when Mr. Winter approached her at the swim club? She had never seen him before, and it was flattering that he took her for being capable, as if just being a girl her age automatically qualified her as a baby-sitter.  

[5] By the time the Winters came home, Harriet had eaten most of the M & M's in the glass bowl on their coffee table: first all the blue ones, then the red ones, then all the green ones, and so on, leaving, in the end, only the yellow.  

[6] They gave her too much money and didn’t ask her about anything. Mrs. Winter seemed to be waiting for her to leave before checking on the baby. Mr. Winter drove her home in silence. When they reached her house he said, My wife. He hesitated, then he said, You understand, don't you? and Harriet answered Yes without looking at him or being sure what they were talking about although she did   really know what he was telling her and then she got out of his car and watched him drive away.  

___________

¹ Bestow (verb): to give or present

² Orthodonture refers to the branch of dentistry dealing with the prevention or correction of irregularities of the teeth.

³ Malocclusion refers to a misalignment of teeth.

Step-by-step explanation:

Comment on the impact of the flashback in paragraph 2. How does it contribute to the story? Use textual evidence to justify your response.

helppp meee

   ^ this is the question

Answer:

Step-by-step explanation

(-y-y1)/(x-x1)= m

y-(-10)/(x-2)= -3

y= -3x -4

Answer:

[tex]y+10=-3(x-2)[/tex]

Step-by-step explanation:

First we must know the format of point-slope form.

This would be: [tex]y-y1 = m (x-x1)[/tex]

Given x = 2, y = -10, and that our slope MUST be -3

Lets solve for "b" in the slope-intercept form using the variables provided to us. Remember that slope-intercept form is: [tex]y=mx+b[/tex]  where "m" is the slope.

-10 = -3(2) + b

-10 = -6 + b

-4 = b

Congrats! We now have our b variable, which means we can write out our slope-intercept form for our equation. This would be:  [tex]y=-3x-4[/tex]

We aren't done though, we now must convert this into point-slope form! Remember that x = 2 and y = -10

Lets plug in -3 for the "m" spot, -10 for the "y1" spot, and 2 for the "x1" spot in the point-slope equation.

[tex]y+10=-3(x-2)[/tex]

(Why are we adding 10 instead of subtracting you might ask? Remeber that two negatives equal a positive; when we plugged in -10 into the "y1" spot it was already negative, it would essentially be this:  [tex]y - (-10)[/tex]  which turns into a positive!)

Huzzah! We now have our equation in point-slope form which is equivalent to: [tex]y=-3x-4[/tex]

Feel free to check on the Desmos graphing calculator if you wish!

If you have any questions feel free to ask! Hope this helped!

Step-by-step explanation:

x : (x + 3) = 2 : 3

[tex] \frac{x}{x + 3} = \frac{2}{3} [/tex]

[tex]3x = 2x + 6[/tex]

[tex]3x - 2x = 6[/tex]

[tex]x = 6[/tex]

The value of x on simplifying the expression x : (x + 3) = 2 : 3 is 6.

If b is not equal to 0, an ordered pair of numbers a and b, denoted as a / b, is a ratio. A proportion is an equation that equalizes two ratios. It is the contrast of two different quantities. For instance, if your father weighs 90 kg, and you weigh 30 kg, the weight ratio is 1:3.

Given:

x : (x + 3) = 2 : 3,

Calculate the value by simplifying the expression,

3x = 2 (x + 3)

3x = 2x + 6

x = 6

To know more about Ratios:

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Answer: (a.) 3x18= +54 meters.    (b.) (-12)+(-12)+(-12) =-36 Celsius

Step-by-step explanation:

9514 1404 393

Answer:

  (a)  m = 0.47, b = 154.30

  (b)  b = fixed costs, listed as insurance and car payments.

Step-by-step explanation:

(a) All you're required to do here is recognize that the fixed costs of $154.30 for insurance and car payments represent the constant part of the monthly expense. And, the $0.47 per mile represents the mileage-related part of the monthly expense. Of course the mileage-related charge is the product of the per-mile charge ($0.47) and the number of miles (x).

Then the monthly charge is ...

  monthly cost = mileage-related cost + constant (fixed) cost

  y = mx + b

  y = 0.47x + 154.30   ⇔   m = 0.47, b = 154.30

__

(b) The 'b' in the equation is the fixed monthly cost: $154.30 for insurance and car payment.

-4x + 60 < 72

= -4x > 72 - 40

= -4x > 12

= x > 12/-4

= x > -3

Answer:

Brian because if you do the math correctly it should be Brian

Answer:

Laurie

Step-by-step explanation:

Laurie

12 +3 (3² + (-9)) = 12 +3 (9 +(-9))   {Here, 3² is calculated}

                         = 12 + 3 *0         {9 - 9 = 0}

                         = 12 + 0      {Anything multiplied by 0 = 0}

                          = 12

Answer:

54 degrees

Step-by-step explanation:

The sum of all the exterior angles on ANY convex polygon = 360 degrees

X = 360-47-97-36-88-38

= 54 degrees

Answer:

c = -9/2

Step-by-step explanation:

Answer:

steps below

Step-by-step explanation:

aₙ = a₁ * rⁿ⁻¹

a₁ * r²⁻¹ = 6

a₁ * r = 6   ... (1)

a₁ * r⁵ = 1458  ... (2)

(2)/(1) : r⁴ = 243      r = ±3 [tex]\sqrt[4]{3\\}[/tex]

if r = 3 [tex]\sqrt[4]{3\\}[/tex]

[tex]a_{1} = 6 / 3\sqrt[4]{3} \\a_{1} = \frac{2}{3} \sqrt[4]{27}[/tex]  

if r = -3 [tex]\sqrt[4]{3\\}[/tex]

[tex]a_{1} = -\frac{2}{3} \sqrt[4]{27}[/tex]

The first term of the geometric progression is 256.

A geometric sequence is a sequence of numbers in which the ratio between consecutive terms is constant.

We have,

Let the first term of the geometric progression be denoted by 'a', and let the common ratio be denoted by 'r'.

According to the problem, the second term is 6, so we have:

ar = 6 ...(1)

Similarly, the seventh term is 1458, so we have:

[tex]ar^6[/tex] = 1458 ...(2)

We can use equation (1) to solve for 'r', and then substitute the value of 'r' into equation (2) to solve for 'a'.

From equation (1), we have:

r = 6/a

Substituting this into equation (2), we get:

[tex]a(6/a)^6[/tex] = 1458

Simplifying the right side of the equation, we have:

[tex]6^6[/tex] = 1458a

Solving for 'a', we get:

a = [tex]6^6[/tex]/1458 = 256

Therefore,

The first term of the geometric progression is 256.

Learn more about geometric sequence here:

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Work Shown:

Social Security = 6.2% of 433.21 = 0.062*433.21 = 26.86

Medicare = 1.45% of 433.21 = 0.0145*433.21 = 6.28

Add up those results to get 26.86+6.28 = 33.14

Answer:

The answer is -2

Step-by-step explanation:

2 to the 3rd power would be the same as saying 2x2x2 which is 8. Now with that, you know that y is 6 and o is 4, so you would do 8-6-4. I hope this helps!

Answer:

Step 1: 2x - 6 = 4x

Step 2: -6 = 2x

Step 3: -3 = x

Step-by-step explanation:

Step 1: Start off with the distributive property, multiplying 2 by x and -3.

2(x - 3) = 4x ------> 2x - 6 = 4x

Step 2: Subtract 2x from both sides.

2x - 6 = 4x ------> -6 = 2x

Step 3: Divide by 2 to solve for x.

-6 = 2x ------> x = -3

ngl you should probably know this...

Answer:

4, 3, then 5

Step-by-step explanation:

1. 2x-6=4x

2. -6=2x

3. -3=x

Answer:

answer is B

Step-by-step explanation:

Answer: a

Step-by-step explanation:

Answer: 20m^(2)-9m-20

Step-by-step explanation

Answer:

The last

Step-by-step explanation:

6^2 = 36 and (-6)^2=36 so the last is the correct answer.

Answer:

Last Option

Step-by-step explanation:

1: Take the square root of both sides.

2. Now, the points, q and p, on the last option are at -6 and 6. Therefore, the last option is the correct answer.

Answer:

0.131579 x 10^2

Step-by-step explanation:

Hope It helps

Answer:

2 × [tex]4x^{n}[/tex]- 1

Step-by-step explanation:

Step-by-step explanation:

you have to multiply 20 by 80

Answer:

How many liters are in a full tank? ----- Answer:

Step-by-step explanation:

20 % of 80 = 16

(I really don't know what your asking for, your missing pieces to the question.)

Sorry, :(

Answer:

18cm

Step-by-step explanation:

20/10 = 2cm

So since 2x10 is 20 and it exceeded only 10%, we only subtract 2 from 20 which you leave you with 18cm.