Simplify (3 + 4a) + (5a + 3)
2 answers:
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Answer:
Randy is 48 years old
Sandy is 12 years old
Todd is 27 years old
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Step-by-step explanation:
Given
Represent their ages with the first letters of their names:
Required
Determine their individual ages
We'll solve the above equations using substitution method of simultaneous equations
Substitute 15 + S for T and 4 * S for R in
This gives:
Collect Like Terms
Divide through by 6
<em>This implies that Sandy is 12 years old</em>
Substitute 12 for S in and
<em>This implies that Randy is 48 years old and Todd is 27</em>
A football field is rectangle so each matching side has the same length. Perimeter = adding all sides
