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gogolik [260]
3 years ago
8

Find the area of the regular octagon if the apothem is 3 cm and a side is 2.5 cm. Round to the nearest whole number.

Mathematics
1 answer:
miss Akunina [59]3 years ago
8 0
What the person who is asking the question forgot to say is that its one of these answers

A.30cm2
B.55cm2
C.18cm2
D.60cm2

oh and I believe the answer is 30cm2



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Please help!! I don’t get it
Marrrta [24]

Answer:

Each hotdog costs $1.65

Each juice drink costs $1.05

Step-by-step explanation:

Let's begin by letting x represent the number of hot dogs and y the number of juice drinks.

The Baxter family bought 6 hot dogs and 4 juices for $14.10.

6x + 4y = 14.10

The Farley family bought 3 hot dogs and 4 juices for $9.15.

3x + 4y = 9.15

Now, we subtract these equations.

6x + 4y = 14.10\\- (3x + 4y = 9.15)

Since y has reversed coefficients, it gets eliminated. Now solve for x.

6x+4y-3x-4y=14.1-9.15\\3x = 4.95\\\frac{3x}{3} = \frac{4.95}{3}

\frac{4.95}{3} = 1.65

x = 1.65

NOW, we find y by substituting x with 1.65 (in either equation).

We'll use the first equation.

6x + 4y = 14.10

6(1.65) + 4y = 14.10

9.9 + 4y = 14.10\\4y = 14.1 - 9.9\\4y = 4.2

\frac{4y}{4} = \frac{4.2}{4} \\y = 1.05

x = 1.65

y = 1.05

x represents hotdogs and y represents juice drinks.

Therefore, each hotdog costs $1.65 and each juice drink costs $1.05.

<em> I hope this helps! :)</em>

6 0
3 years ago
how many different lock combinations can be made using the digits 8, 2, 8 and 8 if the 2 is only used once in each combination?​
alexandr402 [8]

2,8,8,8

8,2,8,8

8,8,2,8

8,8,8,2

4 combinations.

Hope this helps!

5 0
3 years ago
I'm confuzzled....................
erastovalidia [21]
Let 2 numbers are x and y
2(x+y) = 24
x = 2y

substitute x = 2y into 2(x+y) = 24

2(x+y) = 24
2(2y+y) = 24
2(3y) = 24
6y = 24
   y = 4
x = 2y = 2(4) = 8
smallest of the two numbers are 4

answer
C) 4
7 0
3 years ago
Simplify (4x2+ 12x − 9) + (7x2− x + 3).
Leni [432]
       Answer:
D ) 11 x² + 11 x - 6        .. .. ... ... ... .
.  . . . . . . . . 

7 0
4 years ago
What are these numbers in scientific notation ?
IgorLugansk [536]

Count how many places to the left you need to move the decimal point to get one digit to the left of the decimal point. That number of places is the exponent you use for the power of 10 when you write the number in scientific notation.

For example, 200. = 2.00×100 = 2.00×(10×10) = 2.00×10²

In scientifc notation, your numbers are

  • 5.7909×10⁷ kilometers
  • 1.082×10⁸ kilometers
  • 1.496×10⁸ kilometers
  • 2.2794×10⁸ kilometers
  • 7.7833×10⁸ kilometers
  • 1.4246×10⁹ kilometers
  • 4.4982529×10⁹ kilometers
8 0
3 years ago
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