All categories

2 years ago

Geometry please help (pentagons)

Mathematics

1 answer:

SashulF [63]2 years ago

3 0

Answer:

144

Step-by-step explanation:

540 degrees is the sum of angles in a pentagon

Divide 540 by 5(number of sides) =108(interior angle)

Since there are two pentagons you do 108 X 2 = 216 degrees

Do 360 - 216 = 144

so your answer is right

You might be interested in

If A ⊂ B, then A ∩ B = A ∪ B. always sometimes never

Artist 52 [7]

<span>Sometimes. The following figure shows.</span>

4 0

3 years ago

Look at the picture and answer correctly so i can mark you as brainliest.

vodomira [7]

Answer:

{-8, 4, 11}

Step-by-step explanation:

Domain is the x value and the numbers have to be in order! Srry but I gtg now :(

6 0

3 years ago

What is the volume of this container

Schach [20]

First fine the volume of ur big box:

10x10x15
=1500

Then ur small one:

4x4x2
=32

Lastly, subtract the small one from the big one

1500-32
=1468

Ur answer is 1468in^3

6 0

3 years ago

A metallurgist has one alloy containing 32% copper and another containing 65% copper. How many pounds of each alloy must he use

kompoz [17]

Answer:

<h2>30.67 pounds of 32% copper alloy and 10.33 pounds of 65% copper alloy</h2>

Step-by-step explanation:

First alloy contains 32% copper and the second alloy contains 65% alloy.

We wish to make 44 pounds of a third alloy containing 42% copper.

Let the weight of first alloy used be $x$ in pounds and the weight of second alloy used be $y$ in pounds.

Total weight = $44\text{ }pounds=x+y$ $-(i)$

Total weight of copper = $42\%\text{ of 44 pounds = }32\%\text{ of }x\text{ pounds + }65\%\text{ of }y\text{ pounds }$

$\dfrac{42\times 44}{100}=\dfrac{32x}{100}+\dfrac{65y}{100}\\\\ 32x+65y=1848$ $-(ii)$

Subtracting 32 times first equation from second equation,

$32x+65y-32x-32y=1848-32\times44\\33y=440\\y=13.333\text{ }pounds \\x=30.667\text{ }pounds$

∴ 30.67 pounds of first alloy and 13.33 pounds of second alloy were used.

4 0

3 years ago

Which of the following groups are like terms?

Mice21 [21]

Answer:

We need the groups

Step-by-step explanation:

7 0

3 years ago