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3 years ago

Please help I’m so confused 25 points and brainliest!!

Mathematics

2 answers:

Jobisdone [24]3 years ago

7 0

Answer:

1 is 15.7, 2 is 31.4, 3 is 12.5

Step-by-step explanation:

1.C=πd

C=π×5

C=5π

Circumference = 15.7

2.C=2πr

C=2×π×5

C=10π

Circumference = 31.4

3. diameter=Cπ

d=39.25π

d=39.25/3.14

Diameter = 12.5

Hope this helped.

il63 [147K]3 years ago

5 0

Answer:

1=15.7

2:31.4

3:12.5

Step-by-step explanation:

1=5×3.14=15.71

2:5×2=10×3.14=31.42

3:39.25÷3.14=12.5

hope this helps

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Please help !! asap mathematic question worth 12 points

faust18 [17]

Answer:

1. (d) First F, then D, then C

2. x=16, not extraneous

Step-by-step explanation:

1. Let's solve the given equation and see which steps we need:

$\sqrt{6x + 4} = 8$

Since the X is under a square root, let's raise both sides to their square value.

$\sqrt{6x + 4}^{2} = 8^{2}$

So we get: 6x + 4 = 64

Next step is to isolate the x factor, so we need to subtract 4 on both sides, to get:

6x = 60

Then to isolate x, we need to divide both sides by 6.

x = 10.

2. Solve for x. $\sqrt{x + 9} - 4 = 1$

We'll first begin by isolating the square root on its side alone:

$\sqrt{x + 9} = 5$

Then we'll raise each side to its square: x + 9 = 25

Isolate x, to get x = 16

Now, is that solution extraneous or not?

Let's enter 16 in the initial equation and find out:

$\sqrt{x + 9} - 4 = \sqrt{16 + 9} - 4 = \sqrt{25} - 4 = 5 - 4 = 1$

It works, so the solution is not extraneous!

4 0

3 years ago

Tpy6a [65]

Area of the shaded region = area of big square minus area of little square.

Here is the set up:

Let A_s = area of shaded region.

A_s = (2x + 2)(3x - 4) - [(x - 3)(x - 6)]

Take it from here.

3 0

3 years ago

Read 2 more answers

Adrian just got hired for a new job and will make $66,000 in his first year. Adrian was told that he can expect to get raises of

Ann [662]

Answer:

Adrian would make $196000 in his 26th year working.

Step-by-step explanation:

Adrian salary in first year = $66,000

As Adrian is expected to get raises of $5,000 every year going forward.

Here is the sequence of Adrian's raises:

5,000, 10000, 15000, 20000, 25000 .....

As the common difference between consecutive terms is constant.

d = 10000 - 5,000 = 5,000 ⇒ d = 15000 - 10000 = 5,000

So, Adrian's raises is in Arithmetic sequence.

a₁ = 5,000

n = 26

$\ a_{n}=a_{1}+(n-1)d$

Put n = 26 to get the total amount of salary raises in Adrian's 26th year.

$\ a_{26}=5000+(26-1)5000$

$\ a_{26}=5000+(25)5000$

$\ a_{26}=5000+125000$

$\ a_{26}=130000$

Total raises amount after 26th year = $130000

Adding total raises after 26th year to the initial salary would let us figure out the total salary Adrian would make in his 26th year.

So,

Total Salary after 26th year = initial salary + total raises of 26 years

= 66000 + 130000

= $196000

So, Adrian would make $196000 in his 26th year working.

<em>Keywords: arithmetic sequence, salary, raises, common difference</em>

Learn more about word problems regarding salary from brainly.com/question/4114612

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6 0

3 years ago

F(x) = x^2 What is g(x)?

neonofarm [45]

graph becomes slimmer, so definitely be multipled 1/2

7 0

3 years ago

PLEASE HELP, WILL GIVE BRAINLIST TO BEST ASNWER GOOD EASY POINTS!<br><br> right answers only please

worty [1.4K]

The line of the best fit is y = 2100x -4166040 and the number of bottles is, 86460 which expect to sell in 2025

A mathematical notion called the line of the best fit connects points spread throughout a graph. It's a type of linear regression that uses scatter data to figure out the best way to define the dots' relationship.

We have data shown in the table:

To find the line of best fit, we will calculate its slope and y-intercept.

We know the slope is given by:

$\rm m = \dfrac{n\sum xy-\sum x \sum y}{n \sum x^2 - (\sum x)^2}$ where n = 5

After calculating, we get,

$\rm n\sum xy-\sum x \sum y = 105000$ and

$\rm n \sum x^2 - (\sum x)^2 = 50$

m = 105000/50 = 2100

For y-intercept b:

$\rm b = \dfrac{\sum y -m \sum x}{n}$

After calculating:

b = -4166040

The line becomes:

y = 2100x -4166040

If x = 2025 put this value in the line, we get:

y = 86460

Thus, the line of the best fit is y = 2100x -4166040 and the number of bottles is, 86460 which expect to sell in 2025

Learn more about the line of best fit here:

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2 years ago