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Korvikt [17]
3 years ago
5

Please help questions 18-20 for 49 POINTS

Mathematics
2 answers:
yanalaym [24]3 years ago
8 0
Ok, so since they arre all the same length....


18. sides are all same length
so
5-2x=-4x+9
solve
add 4x both sides
5+2x=9
mins 5 both sides
2x=4
x=2

sub back
5-2x=5-2(2)=5-4=1
the length of each side is 1
3 sides so the perimiter is 3 units




19.
same side length so
3(x-1)=5x-6
distribute
3x-3=5x-6
minus 3x both sides
-3=2x-6
add 6 both sides
3=2x
divide 2
3/2=x
sub back
5x-6
5(3/2)-6
15/2-6
7.5-6
1.5

5 sides so
1.5 times 5=7.5 units is the perimiter
which is about 15/2 units



20.
we can't see what's after the x+? so this is a mystery quesiton
Sauron [17]3 years ago
3 0
<h2><em>I cant see Question 20 tho</em></h2><h2><em>I wan to help if I can see it</em></h2>
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a room in a form of a cuboid has a length of 5cm, height 8cm and breadth 0.07m. if one person can occupy a volume of 14cm3(cube)
Over [174]

Answer:

20 people

Step-by-step explanation:

The volume of a cuboid is equal to length * breadth * height.

First, we want to figure out the values relative to each other. Everything is in centimeters except the breadth, which is 0.07m. To convert meters to centimeters, we can multiply by 100: 0.07 * 100 = 7, so the breadth is 7cm.

Next, the volume is  length * breadth * height = 5cm * 7cm * 8cm = 280cm³. Each person occupies 14cm³. To find how many people can occupy the cube, we can divide the volume by the space each person takes, so

280cm³/14cm³ = 20 people

Note that we can divide because each person takes x amount of space, and the total space, z, can be represented by x * y = z, with y representing the amount of people, because we add x space for each person. Dividing both sides by x, we get y = z/x

5 0
3 years ago
What is the answer to 6,007,200 in exspanded form
Rzqust [24]
6,000,000 + 7,000+ 200    is your expanded form

hope this helps
4 0
3 years ago
I need help please?!!!!!!
Alika [10]

Answer: The is B

Step-by-step explanation:

4 0
3 years ago
12 cm<br> 14 cm<br> 1<br><br> -<br> Find volume
Anettt [7]

Answer:

<h3>Volume of cylinder = 6,330.24 cm</h3>

Solution:

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Volume = πr² × altitude

V= 3.14 × 12² × 14

V = 3.14 × 144 × 14

V = 6,330.24 cm

4 0
2 years ago
Need help now please, ill give brainliest
emmainna [20.7K]

Answer:

D

Step-by-step explanation:

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4 0
3 years ago
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