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3 years ago

Which of the following polygons has nine lines of symmetry?

Mathematics

2 answers:

Nataliya [291]3 years ago

7 0

I'm pretty sure the answer is C.

An octagon has 8 sides, a heptagon 7, and a hexagon 6. The remaining answer has 9 sides.

anastassius [24]3 years ago

3 0

So we know d. is out and that's all I got help wise sorry its not much..:)

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Use the graph below to determine a1 and d for the sequence. graphed sequence showing point 1, negative 10, point 2, negative 7,

Sonja [21]

Answer:

$a_1=-10$

$d=3$

Step-by-step explanation:

we know that

In an <u><em>Arithmetic Sequence</em></u> the difference between one term and the next is a constant, and this constant is called the common difference (d)

In this problem we have the ordered pairs

$(1,-10),(2,-7),(3,-4),(4,-1),(5,2),(6,5)$

Let

$a_1=-10\\a_2=-7\\a_3=-4\\a_4=-1\\a_5=2\\a_6=5$

Find the difference between one term and the next

$a_2-a_1=-7-(-10)=3$

$a_3-a_2=-4-(-7)=3$

$a_4-a_3=-1-(-4)=3$

$a_5-a_4=2-(-1)=3$

$a_6-a_5=5-2=3$

The difference between one term and the next is a constant

This constant is the common difference

The sequence graphed is an Arithmetic Sequence

therefore

The first term is $a_1=-10$

The common difference is equal to $d=3$

4 0

3 years ago

Jackson drinks 0.44 liters of water, which was 55% of the water in the bottle. How much water was in the bottle to start?

Delicious77 [7]

Answer:

He had 0.8 liters to start with...

Step-by-step explanation:

0.44 is 55% of what? (what = x)

Equation: Y = P% * X

X = Y/P%

X = 0.44/55%

55% = 0.55

X = 0.44/0.55

X = 0.8

7 0

3 years ago

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Solve the quadratic function by factoring. You must fill in

Stells [14]

Answer:

5x+2=0

Step-by-step explanation:

When factoring you add or subtract your factors that are similar.

For example 9x-4x+ 5x

and this is how you get 5x+2=0

Any Questions?

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3 years ago

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3x-2x=6-7 solve this problem step by step

elena-s [515]

Answer:

-1

Step-by-step explanation:

1x= -1

x= -1

5 0

3 years ago

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What is the sum to the equation 6 = 1/2z

mel-nik [20]

Z=72, i was working on it and that’s what i got

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3 years ago

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