Answer:
a -6r+6
Step-by-step explanation:
Use - to expand the bracket
Group like terms and simplify
The ages of three children in a family can be expressed as consecutive integers. The square of the age of the youngest child is
1 answer:
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A direct variation is a mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other. In other words, a direct variation is where 
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In answer a,
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In answer c,
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In answer d,
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In answer a,
In answer c,
In answer d,
Only answer b is left, which means the answer must be 'b'.
We also know 'b' is the answer because it cannot be expressed as <span>
Hope I helped, and let me know if you have any questions :)