X + y = 21 3x – 2y = -12

Mathematics

2 answers:

kondaur [170]1 year ago

8 0

Answer:

x = 6 y = 15

Step-by-step explanation:

If this is simultaneous equations

x+y=21

3x-2y= -12

-3(x+y=21)

1(3x-2y= -12)

-3x -3y= -63

3x-2y= -12

-5y= -75

y= -75/-5

y= 15

x+y=21

x+15=21

x=21-15

x=6

Varvara68 [4.7K]1 year ago

7 0

This is the answer !!!!!!!!!!!

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What is the volume of the right prism with height h=14 cm, if the base of the prism is a triangle ∆ABC with side AB = 9 cm and a

Lina20 [59]

Answer:
volume of prism = 378 cm³

Explanation:
The volume of the right prism can be calculated as follows:
volume of prism = area of base * height of prism

1- getting the area of base:
Our base is a triangle, this means that:
area = 0.5 * base * height
We have:
base = 9 cm
height = 6 cm
Therefore:
area of base = 0.5 * 9 * 6
area of base = 27 cm²

2- getting the volume:
volume of prism = area of base * height of prism
volume of prism = 27 * 14
volume of prism = 378 cm³

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2 years ago

An object’s volume is 0.12 kL. What is its volume in liters?

mrs_skeptik [129]

Answer:

120L

Step-by-step explanation:

Given quantity;

0.12kL to L

Solution:

Convert the given quantity to Liters;

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