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ryzh [129]
4 years ago
9

10 ÷ (20 ÷ 2² × 5 ÷ 5) × 8 - 2

Mathematics
1 answer:
dangina [55]4 years ago
5 0
Use PEMDAS:

P arenthesis
E xponents
M ultiplication
D ivision
A dd
S ubstract

Paranthesis and Exponents
(20 / 2^2 * 5 / 5) = 5

Multiplication
5*8= 40

Division
10 / 40 = 0.25

Subtraction
0.25 - 2 = −1.75

Therefore,
The answer is -1.75


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olga2289 [7]

Using the given information, the height of the shorter cone is 6.81 cm

<h3>Calculating volume of a cone </h3>

From the question, we are to determine the height of the shorter cone.

First, we will calculate the volume of the first cone

Using the formula for calculating the volume of a cone,

V = \frac{1}{3}\pi r^{2}h

Where V is the volume

r is the radius

and h is the height

From the given information,

r = 8.5 cm

h = 10 cm

Then,

V = \frac{1}{3}\pi \times 8.5^{2}\times 10

V = \frac{1}{3}\pi \times 72.25\times 10

V = \frac{722.5}{3}\pi cm³

Now, for the shorter cone

r = 10.3 cm

Since the two cones have the exact same volume, we can write that

\frac{722.5}{3}\pi= \frac{1}{3}\pi \times 10.3^{2} \times h

722.5= 106.09 \times h

h = \frac{722.5}{106.09}

h = 6.81 cm

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Learn more on Calculating volume of a cone here: brainly.com/question/12004994

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4 0
2 years ago
Find the area and perimeter of the figure below.
kkurt [141]

Answer:

Area: 6x+6

Perimiter: 4x+10

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Area=3(2x+2)

Area=6x+6

Perimeter=3+3+(2x+2)+(2x+2)

Perimeter=6+4x+4

Perimeter=4x+10

6 0
3 years ago
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If no one came to the dinner,the charity would still raise about $1250. 


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Yuri [45]
First of 30% of 2500kcal is 750kcal
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3 0
4 years ago
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Tell wheather the system has one solution, infinitely many solutions, or no solution.
ipn [44]
<h3>Answer:</h3>
  1. One solution: (x, y) = (2, 0)
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<h3>Step-by-step explanation:</h3>

1. When you put the second equation in standard form, it is ...

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This is a different equation than the first one, so there will be one solution where the lines interect. (Adding the two equations gives 10x=20 ⇒ x=2. Since adding or subtracting y gives the same result, y must be zero.)

2. When you put the second equation in standard form, it is the same as the first:

... 2x -5y = 17 . . . . . divide the equation by 3

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