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Tamiku [17]
3 years ago
5

Hey please help me ASAP I will give you brainlest.

Mathematics
1 answer:
Volgvan3 years ago
8 0

Answer:

5cm

Step-by-step explanation:

volume = πr²h

225π = π × r² × 9

225/9 = r²

r = √225/9 = 15/3 = 5cm

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Use the distributive property to expand the following expression.
Levart [38]

Answer:

-12.8x - 20y + 8.4

Step-by-step explanation:

To do this you just multiply everything by negative 4

so we have 3.2x*-4 + 5y*-4 - 2.1*-4

This gives us

-12.8x - 20y + 8.4

The last term is positive because we multplied a negative by another negative

3 0
3 years ago
What is the solution set of the inequality 2(5+3x) >13 +6? A.x 22 C.no solution D.infinitely many solutions
Nezavi [6.7K]

Answer:

I would choose either A.x 22 or D. infinitely many solutions

Step-by-step explanation:

Since you did put the answer choice B then I don't know what are all the possible answer choices

5 0
3 years ago
Read 2 more answers
Write a number sentence that demonstrates each property.
Delvig [45]
They are usually represented like this

commutative property of addition
a+b=b+a

associative property of additon
(a+b)+c=a+(b+c)

identity property of addition
a+0=a




so number sentatnces

lets say a=1,b=2,c=3




commutative property of addition
1+2=2+1

associative property of addition
(1+2)+3=1+(2+3)

identity property of addition
1+0=1
3 0
3 years ago
Read 2 more answers
The total number of degrees, D, in an n-sided polygon is given by the formula D=180(n-2). When Janelle solves for n, she gets n=
Rus_ich [418]
<span>D = 180 * (n -2)
D = 180n -360
180n = D +360
n = (D / 180) + 2

So, the answer is "A"
And we can test this with a square, sum of angles = 360
n = (D / 180) +2
n = (360 / 180) +2
number of sides = 4
correct

Source:
http://www.1728.org/polygon.htm



</span>
3 0
3 years ago
Read 2 more answers
3. Is it possible to solve x (t ) for t, substitute it into y(t) to eliminate the parameter, t, and write it as a rectangular eq
Maslowich

Answer: Yes

Step-by-step explanation:

Though x and y can be achieved in a system of equations. The equation

x (t)=0.0411905(t^2)+(-0.164619)t+28.0114

And

y (t)=-0.024127(t^2)+(-0.591143)t+(-87.4403)

Are not system of equations but rather two different models of equations. Nevertheless

To find t in the first equation, x(t) has to be equal to zero.

When the t is substituted in the second equation, t will completely disappear. Given the value of y(t) and vice versa.

8 0
3 years ago
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