What is the value of -2(x + 5)
1 answer:
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Answer:
State A = oxygen; State B = juice
Option 3
Step-by-step explanation:
Given:
State A: Changes shape and volume
State B: Changes shape but not volume
Multiple Choice options:
State A = juice; State B = block of wood
State A = hydrogen; State B = block of wood
State A = oxygen; State B = juice
State A = air; State B = neon
The three states of matter are
Solid - Does not change shape or volume (like ice)
Liquid - Changes shape but not volume (like water)
Gas - Changes shape and volume (like water vapour in air)
State A must be a gas.
State B must be a liquid.
Eliminate the choice where state A is not a gas.
State A = juice; State B = block of wood
Juice is a liquid, like water.
State A = hydrogen; State B = block of wood
State A = oxygen; State B = juice
State A = air; State B = neon
Find the choice where state B is a liquid.
State A = hydrogen; State B = block of wood
State A = oxygen; State B = juice
State A = air; State B = neon
Incorrect State B:
Block of wood - solid
Neon - gas
Adding both equations will eliminate a variable in the system of equations
Step-by-step explanation:
Given equations are:
One of the methods to solve simultaneous linear equations is elimination. In elimination one of the variables is eliminated from the system to find the value of other variable.
In the given equations we can see that the coefficients of y in both equations are same with opposite signs so adding both equations will eliminate the variable y from the system.
Hence,
Adding both equations will eliminate a variable in the system of equations
Keywords: Linear equations, variables
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