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shtirl [24]
2 years ago
6

Which polygon is a concave octagon?

Mathematics
2 answers:
Bezzdna [24]2 years ago
8 0

The polygon in option 3 is not octagon at all, it is heptagon (or 7-sided polygon).

A convex octagon has no angles pointing inwards. More precisely, no internal angles can be more than 180°.

When some internal angle is greater than 180°, it is concave.

In option 2 you can see that one angle is pointing inward, then this octagon is concave.

Answer: correct choice is B.

Lena [83]2 years ago
3 0
2nd one. it is concave because one of the side goes inside of the octogon.Its pretty easy tbh. Hope it helped.
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Find the new balance if $875 is deposited and $316 is withdrawn from a balance of $2,056.
cestrela7 [59]
Hello!

Answer:
$2,615
Explanation:
The balance of $ 2,056 is a positive number,
The deposits of $ 875 is a positive number.
The withdrawal of $ 316 is a negative number.
5 0
3 years ago
Graham is graphing the inequality x greater-than 4. He draws a number line and shades over the numbers that are greater than 4.
schepotkina [342]

Answer:

Draw an open circle at 4

Step-by-step explanation:

8 0
2 years ago
Please help me. 5(m-7)=-8(3m+8)
inessss [21]

Answer:

m = -1

Step-by-step explanation:

Solve for m:

5 (m - 7) = -8 (3 m + 8)

Hint: | Write the linear polynomial on the left hand side in standard form.

Expand out terms of the left hand side:

5 m - 35 = -8 (3 m + 8)

Hint: | Write the linear polynomial on the left hand side in standard form.

Expand out terms of the right hand side:

5 m - 35 = -24 m - 64

Hint: | Move terms with m to the left hand side.

Add 24 m to both sides:

24 m + 5 m - 35 = (24 m - 24 m) - 64

Hint: | Look for the difference of two identical terms.

24 m - 24 m = 0:

24 m + 5 m - 35 = -64

Hint: | Group like terms in 24 m + 5 m - 35.

Grouping like terms, 24 m + 5 m - 35 = (5 m + 24 m) - 35:

(5 m + 24 m) - 35 = -64

Hint: | Add like terms in 5 m + 24 m.

5 m + 24 m = 29 m:

29 m - 35 = -64

Hint: | Isolate terms with m to the left hand side.

Add 35 to both sides:

29 m + (35 - 35) = 35 - 64

Hint: | Look for the difference of two identical terms.

35 - 35 = 0:

29 m = 35 - 64

Hint: | Evaluate 35 - 64.

35 - 64 = -29:

29 m = -29

Hint: | Divide both sides by a constant to simplify the equation.

Divide both sides of 29 m = -29 by 29:

(29 m)/29 = (-29)/29

Hint: | Any nonzero number divided by itself is one.

29/29 = 1:

m = (-29)/29

Hint: | Reduce (-29)/29 to lowest terms. Start by finding the GCD of -29 and 29.

The gcd of -29 and 29 is 29, so (-29)/29 = (29 (-1))/(29×1) = 29/29×-1 = -1:

Answer: m = -1

7 0
3 years ago
michelle and rosa are researching the deepest lakes in the united states for a school project. lake tahoe has a depth of 1,644 f
Hatshy [7]

Answer:

Rosa is closer to the correct depth.  

Step-by-step explanation:

To show that two measurements are nearly equivalent, we must convert one of the measurements to the other unit.

1 m = 3.281 ft

\text{Depth } = \text{1644 ft} \times \dfrac{\text{1 m}}{\text{3.281 ft}} = \textbf{501.1 m}

Neither is correct but Rosa is closer to the correct depth.

4 0
2 years ago
Anson collected 720 seashells. Then he gave 209 seashells to
vaieri [72.5K]

Answer:

18.75%

Step-by-step explanation:

720 - (209+376) =

720 - 585 = 135

135/720 = 0.1875 --> 18.75%

3 0
2 years ago
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