All categories

3 years ago

A regular polygon has an exterior angle of 18 degrees how many sides does it have

Mathematics

1 answer:

Ne4ueva [31]3 years ago

8 0

20 because for all regular polygons their exterior angles add up to 360, so 360\18 =20

You might be interested in

3 expressions equivalent to 2x + 4x –15

TiliK225 [7]

Answer:

6x-15

Step-by-step explanation:

Just combine like terms.

2x+4x-15=6x-15

6 0

3 years ago

Read 2 more answers

Worth 60 points

alex41 [277]

Answer:

Line y = -x + 2 intersects line y = 3x + 1

Step-by-step explanation:

The solution to a system of equations is the point at which the two lines intersect. To find this point, first equate the equations and solve for x:

$\begin{aligned}y & = y\\-x + 2 & = 3x + 1\\-x+2+x & = 3x+1+x\\2 & = 4x + 1\\2-1 & =4x+1-1\\1 &=4x\\x & =\dfrac14\end{aligned}$

Substitute the found value of x into one of the equations, and solve for y:

$y=3\left(\dfrac14\right)+1=\dfrac74$

Therefore, the solution to the system of equations (the point at which the two lines intersect) is:

$\left(\dfrac14,\dfrac74\right)$

So the description that best describes the solution to the system of equations is:

Line y = -x + 2 intersects line y = 3x + 1

3 0

2 years ago

Let r(t)=⟨t2,1−t,4t⟩. calculate the derivative of r(t)⋅a(t) at t=5, assuming that a(5)=⟨−4,4,−5⟩ and a′(5)=⟨−5,9,3⟩

erastovalidia [21]

$\mathbf r(t)=\langle t^2,1-t,4t\rangle$
$\implies\mathbf r'(t)=\langle 2t,-1,4\rangle$

$\dfrac{\mathrm d(\mathbf r(t)\cdot\mathbf a(t))}{\mathrm dt}\bigg|_{t=5}=\mathbf r'(5)\cdot\mathbf a(5)+\mathbf r(5)\cdot\mathbf a'(5)$
$=\langle10,-1,4\rangle\cdot\langle-4,4,-5\rangle+\langle25,-4,20\rangle\cdot\langle-5,9,3\rangle$
$=(-40-4-20)+(-125-36+60)$
$=-165$

6 0

3 years ago

There are 72 tablespoons of coffee in a jar. If it takes 48 days to empty the

oksano4ka [1.4K]

Answer:

2.7 tablespoons.

Step-by-step explanation:

If you divide 72 by 48 you will get 2.57142857143, round to the nearest tenth you get, 2.7 tablespoons

3 0

3 years ago

Randall is cutting a

xenn [34]

Randall will have 4 sandwiches. If he wants 1 foot pieces and has 4 feet of sandwich, that will turn into 4 of them.

8 0

2 years ago