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3 years ago

How many sides does a regular polygon have if its exterior angles A. 45B. 30

1 answer:

3 0

I) 4 $5^{0}$
The number of sides= $\frac{360}{45}$
The number of sides =8 sides

ii) 3 $0^{0}$
The number of sides= $\frac{360}{30}$
The number of sides= 12

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Answer:

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2 years ago

L 5.2.3 Quiz: Two-Variable Systems: Substitution

Misha Larkins [42]

Answer:

We get x=3 and y=21

The ordered pair will be: (3,21)

Step-by-step explanation:

We need to use the substitution method to solve the system of equations.

$y = 10x-9\\y = x + 18$

For substitution method we substitute the value of x or y from one equation to other.

Let:

$y = 10x-9--eq(1)\\y = x + 18--eq(2)$

Putting value of y from equation 2 into equation 1

$y=10x-9\\Put\:y=x+18\\x+18=10x-9\\x-10x=-9-18\\-9x=-27\\x=\frac{-27}{-9}\\x=3$

So, we get value of x=3

Now, for finding value of y, We substitute the value of x

Find value of x from equation 2

$y=x+18\\x=y-18$

Now, putting value of x in equation 1

$y=10x-9\\Put\:x=y-18\\y=10(y-18)-9\\y=10y-180-9\\y-10y=-189\\-9y=-189\\y=\frac{-189}{-9}\\y=21$

So, we get value of y=21

So, We get x=3 and y=21

The ordered pair will be: (3,21)

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2 years ago

Joe is recording the percentages he earned on each quiz In his math class. Here are his results for the last 7 quizzes. 72, 82,

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3 years ago

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iris [78.8K]

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3 years ago

Help me, cause I'm tuck

r-ruslan [8.4K]

Answer:

The answer would be 1.33 x $10^{4}$

Step-by-step

1.28 x $10^{4}$ = 12800

5 x $10^{2}$ = 500

12800 + 500 = 13300

13300 = 1.33 x $10^{4}$ in scientific notation

Hope this helps:)

Sorry, I got the wrong answer earlier but I fixed it:)

8 0

3 years ago