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kenny6666 [7]
3 years ago
6

Solve using substitution.

Mathematics
1 answer:
vazorg [7]3 years ago
6 0

Answer:

(3,6)

Step-by-step explanation:

2x-3y = -12

x+y=9. Solve for either y or x

-x. -x

y = -x + 9. Substitute this for the y

2x-3(-x+9)= -12

2x +3x-27 = -12. Add like terms

5x -27 = -12

+27. +27. Inverse operations

5x = 15

÷5. ÷5

x = 3

x + y = 9

3 + y = 9. Substitute 3 for x

-3. -3. Inverse operations

y = 6

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A solid cuboid is made from centimeter cubes how many centimeter cubes were used to make the cuboid
prisoha [69]

This question is incomplete because it lacks the appropriate diagram.

Please find attached this answer the appropriate diagram.

Kindly note that: The diagram was obtained from or referenced from Planes and Elevation (F) Version 3 January 2016.

Answer:

72 centimeter cubes

Step-by-step explanation:

Looking at the attached diagram, we are given 3 views of the cuboid

a) The plan view: The is the view of the cuboid from the top or a very high position

b) Front Elevation view: This is the view of the cuboid from the front

c) Side elevation view: This is the view of the cuboid from the side.

In the referenced and attached diagram,

The plan view shows us the top of the cuboid with a length of 4 and breadth of 6

The front elevation view shows us the front of the cuboid with a length of 3 and breadth of 4

The side elevation view shows us the side of the cuboid with a length is 3 and breadth of 6

We are told to find the number of centimeter cubes were used to make the cuboid. This means we are to find the volume of the cuboid.

Volume of a cuboid = Length × Width × Height

Combining the 3 views together,

The Length of the cuboid = 4

Width of the cuboid = 6

Height of the cuboid = 3

Volume of the cuboid = 4 × 6 × 3

= 72

Therefore, the number of centimeter cubes that were used to make the cuboid is 72.

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