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cricket20 [7]
3 years ago
8

Use elimination to solve 3x-2y=24 x+2y=48

Mathematics
1 answer:
MakcuM [25]3 years ago
5 0

Answer:

X= 18; Y=15

Step-by-step explanation:

As a student myself working this out I cannot explain how I got the answer but I know it is correct.

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PLS PLS. send me the answer for the first question with an explanation. due tmrw so quick.​
otez555 [7]

Answer:

85 nails

Step-by-step explanation:

First, we need to calculate the volume of a single nail. It consists of a circular cylinder and hemispherical part.

The volume of the cylinder πr^2 • h. We are given the diameter of the cylinder (14 mm), so radius is half of that (r = 7 mm) and we are given the height (h = 20 mm).

So, the volume of the cylinder is:

V1 = π • 7^2 • 20

V1 = 3077.2 mm^3

Now for the volume of the hemisphere part. Its volume is half of the sphere:

V2 = (4/3 • πr^3) / 2

Diameter of the sphere is given and it is 21 mm, so the radius is 10.5 mm. So, the volume is:

V2 = (4/3 • π • 10.5^3) / 2

V2 = 2423.3 mm^3

So, the volume of the nail is V1 + V2 which is 5500.5 mm^3

Now let's convert volume of the metal used for making nails. It's given that it is 550.55 cm^3 which is 550550 mm^3.

It is also said that 15% of the volume is wasted, so we are left with 85% of the volume, which is 550550 • 0.85 and that equals to 467967.5 mm^3. So to find a number of nails made from this volume, we divide:

467967.5 / 5500.5 = 85 nails

6 0
3 years ago
Find the volume. cylinder—r = 2 cm; h = 3 cm
Naddik [55]
Volume of a cylinder = πr^2 h = π x (2)^2 x 3 = π x 4 x 3 = 12π = 37.7 cm^3
5 0
2 years ago
Hey guys I need help! I'm having so much trouble with understanding this...
Aleonysh [2.5K]
What part do you have trouble with
8 0
2 years ago
What is the perimeter and area of the figure?
Rudiy27

Perimeter is the sum of all outside dimensions:

5 + 3 + 1 + 2 + 4 + 5 = 20cm

Area = (5 x 5) - (2*1) = 25 - 2 = 23 cm^2

7 0
2 years ago
What is y+3=4(x-1) in Slope intercept form ?
mina [271]
Y+3=4(x-1)
Y+3=4x-4
-3 -3
Y=4x-7
3 0
3 years ago
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