The diameter of a circle is 20 in. Find its circumference in terms of \piπ.

Answer:

672 cm³

Step-by-step explanation:

10x7x9=630

2x3x7=42

630+42=672

Answer:

40ft

Step-by-step explanation:

Add up all four sides of your rectangle:

15ft + 15ft +5ft + 5ft = 40ft

You can find the other 5ft (the side that is missing) if you notice that the smaller sections are squares.

Answer:

42.5 cm²

Step-by-step explanation:

1/2x17x5 = 42.5

Answer: it’s x^3+3x^2+7x+17+3/x-3

Sorry ab the handwriting lol

Step-by-step explanation:

Answer:

$28

Step-by-step explanation:

1/5 of $70 is 14 . so $70 - $14 is $56

1/2 of $56 is $28

Hope this helps x

Answer:

21

Step-by-step explanation:

7-(-14) = 7+14 = 21

Answer:

21

Step-by-step explanation:

7-(-14)

7+14 = 21

because two minuses makes a plus

GIVE ME BRAINLIEST NOW PLEASE!

Answer: f = 100

Step 1.

We'll need to expand 3(f - 91) by multiplying a term and an expression. The following product distributive property will be used: A(B + C) = AB + AC.

In the example, the expression will consist of 2 terms.

First term: 3 and f.

Second term: 3 and -91

Rewrite 3(f - 91) like this.

3f - 3 × 91

Step 2.

Multiply 3 by 91.

3 × 91 = 273

Hence, the answer is 100.

Answer:

24.47

Step-by-step explanation:

First, 35.7 - 11.23 = 24.47, which is your answer

Hope this helps!

Answer:

$1,560

Step-by-step explanation:

6% of $750 = $45

$45 times 18 = $810

$810 + $750 = $1,560

Answer:

4) choice a       30%

5) choice b       62.5%

Step-by-step explanation:

4) 3/10 = 0.30 or 30%

5) 5/8 = 0.625 or 62.5%

Answer:

y = -2x

Step-by-step explanation:

Equation in slope-intercept form is y = mx + b.

m = slope = ∆y/∆x

Using any two points on the line, say (0, 0) and (-20, 40),

Slope (m) = (40 - 0) / (-20 - 0) = 40/-20

Slope (m) = -2

b = y-intercept = the value of y when x = 0.

b = 0

To write the equation of the line, substitute m = -2 and b = 0 into y = mx + b

Thus:

y = -2x + 0

y = -2x

Answer:

C

Step-by-step explanation:

The number of people who have heard a rumor is modeled by the logistic function:

[tex]\displaystyle f(x)=\frac{260}{1+23e^{-0.06x}}[/tex]

And we want how many days has passed since the rate at which the rumor spread began to decrease.

First, the numerator tells us that the total number of people who will have heard the rumor by the end is 260.

Recall that the point of maximum growth is always half of the maximum capacity.

In this case, that point will be 260/2 = 130.

For a logistic function, the rate of all values to the left of the halfway point is increasing, (i.e. concave up), while the rate of all values to the right is decreasing (i.e. concave down). Therefore, we can solve for x when f(x) = 130:

[tex]\displaystyle 130=\frac{260}{1+23e^{-0.06x}}[/tex]

Cross-multiply:

[tex]130(1+23e^{-0.06x}})=260[/tex]

Distribute:

[tex]130+2990e^{-0.06x}=260[/tex]

Solving for x:

[tex]2990e^{-0.06x}=130[/tex]

Therefore:

[tex]\displaystyle e^{-0.06x}=\frac{130}{2990}=\frac{1}{23}[/tex]

Taking the natural log of both sides:

[tex]\displaystyle -0.06x=\ln\Big(\frac{1}{23}\Big)[/tex]

Therefore:

[tex]\displaystyle x=\frac{\ln(1/23)}{-0.06}\approx52.3[/tex]

After about 52.3 days, the rate at which the rumor started spreading will begin to decrease.

Answer:

SCREEEEEEEEeEEEEeeEEeeEEEEEe

Step-by-step explanation:

Answer: 1.2 or 5 (there’s two solutions)

Step-by-step explanation:)

Answer:

2 =6

3= 9

4=12

5=15

Step-by-step explanation:

Formula is 3x

2 x 3= 6

3 x 3=9

4 x 3= 12

15/3= 5

Answer:

x > 5

Step-by-step explanation:

Answer:

we have -3x < -15,

so

3x > 15,

x > 5

brainliest please?

Hope it helps you....

Sorry if it's wrong..

Answer:

the top one!

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

or was it 11??

1-9/16 :) good luck my friend

Answer:

Step-by-step explanation:

Yes it's a function.

You may be looking at v which produces m

You may be looking at r which also produces m.

That's fine. Two different x values (the domain) can produce the same y value. Lots of functions do that. (you'll study parabolas pretty soon and all that open up or down have two x values producing the same y value).

If you have a member of the domain producing 2 y values,  that doesn't work. That would not be a function.

This example is a function.

Answer:

you would save 4$

Step-by-step explanation:

Answer:

C i think

Step-by-step explanation:

pls mark brainlyest

Answer:

3/16

Step-by-step explanation:

If an article takes half of the page then;

1article = 1/2 of a page

3/8 of the article = x

Cross multiply

1×x = 1/2×3/8

x = 3/(2×8)

X = 3/16

Hence the photo takes 3/16 of the magazine

Answer:

$200.75

Step-by-step explanation:

Brainliest please

Answer: 12

hope this helps :)

Answer: 2.1

Step-by-step explanation:

Answer: B and D

Step-by-step explanation: 8.3 · cos (90° -75°) , and i cant remember what D was sorry

Khan Academy

Answer:

13.5 cm

Step-by-step explanation:

The altitude of the base of the isosceles triangle bisects the vertex angle, <T, and also bisects the base, NS.

Therefore, NS is divide into two, 15 cm each.

This means we now have two right triangles from the isosceles triangle with the following:

Reference angle = 42°

Opposite = altitude = h

Adjacent = 15 cm

To find h, apply trigonometric function, TOA:

Tan 42 = Opp/Adj

Tan 42 = h/15

15 * Tan 42 = h

h = 13.5060607 ≈ 13.5 cm (nearest tenth)