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3 years ago

If the radius of a half-circle is 11...

1 answer:

5 0

By giving just the radius and asking for the arc length of that circle your answer will be without math is 22
π
feet

But;

Let’s do same math!

Arc length = (()/360)⋅2⋅⋅
(
(
a
n
g
l
e
o
f
a
r
c
)
/
360
)
⋅
2
⋅
π
⋅
r

In this case angle of arc was not specified so: 360∘
∘
was used.

Arc length = ((360)/360)⋅2⋅⋅11
(
(
360
)
/
360
)
⋅
2
⋅
π
⋅
11

Arc length = 22
π
feet

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Which student factored the expression x3 - 7x - x2 + 7 correctly based on their answer below?

Verizon [17]

We can check the end terms first

for
(a+b)(c+d), the first term of the expanded is ac and the last term is bd

so
the expanded is x^3 and last is +7

jane will have a lst term of -7 so no
mariah wil have last term of -7 as well, so no
only rojer and nethan have last tem of +7

so we can do the rest of it by doing the OL part of FOIL

do either roger or nethan
let's do nethan

F=x^3
O=-7x
I=-x^2
L=7
yep

it is nethan

4 0

4 years ago

Can you help me on that

Dimas [21]

With factoring it??

3 0

3 years ago

Choose the point on the terminal side of -210°. Please only answer this question if you are willing to show work so I can learn

N76 [4]

X=rcos∅=r cos (-210)=r cos 210=rcos (180+30)=-r cos 30
$x=-r* \frac{sqrt 3}{2} = \frac{- sqrt 3r}{2} ,$
$y=r sin (-210)=-rsin 210=-rsin (180+30)=-r(-sin 30)$
1 $or y=r sin 30=r* \frac{ 1}{2} = \frac{r}{2}$

3 0

3 years ago

at a local restaurant the health inspector visits every 7 days and the fire inspector every 12 days make a table for the next 4

luda_lava [24]

Answer:

Health inspector:7,14,21,28

Fire inspector:12,24,36,48

They will both be there on day 84

3 0

3 years ago

A(4, -1), B(3, 8), C(-1, 1); y = -2

nevsk [136]

Answer:

Point A: (4, -3)

Point B: (3, -12)

Point C: (-1, -5)

Step-by-step explanation:

Reflection of point A:

The x will stay the same and only the y will change.

Take the y-coordinate and subtract it from the reflection line while getting the absolute value..

|(-1) - (-2)| = |1| = 1

This means, point A is one unit down the line y = -2

(-2) - 1 = -3

The coordinate for A will now be (4, -3).

Reflection of point B:

Again, the x will stay the same and only the y will change.

Using the absolute value, get the y-coordinate and subtract it from the reflection line again..

|(8) - (-2)| = |10| = 10

This means, point A is five unit down the line y = -2

(-2) - 10 = -17

The coordinate for B will now be (3, -12).

Reflection of point C:

I think you get the gist of it.

|(1) - (-2)| = |3| = 3

(-2) - 3 = -5

The coordinate for C will now be (-1, -5).

I added an image down below of what the reflection looks like. Sometimes it helps to see things visually.

The red triangle is the original image and the blue triangle is the image after the reflection. The purple line is the reflection line y = -2

Hope this helped!

6 0

3 years ago