Mathematics, 11.03.2021 03:40 mtetwabright1105
Clara states that r² + 5r + 3r is an equivalent expression to 9r. Why is Clara's statement incorrect? You need to substitute using r=1, r=2 and r=4 in both expressions to see if they are equivalent. Then read choices carefully. CHOOSE ALL THAT APPLY.
A. The expression r² + 5r + 3r simplifies to r²+8, which is not equivalent to 9r.
B. When you substitute 1 for r in both expressions, r² + 5r + 3r has a value of 10 and 9r has a value of 9. These values are not equal.
C. The expression r² + 5r + 3r simplifies to 10r, which is not equivalent to 9r.
D. When you substitute 2 for r in both expressions, r² + 5r + 3r has a value of 20 and 9r has a value of 18. These values are not equal.
E. When you substitute 4 for r in both expressions, r² + 5r + 3r has a value of 48 and 9r has a value of 36.
F. The expression r² + 5r + 3r simplifies to r(r+8), which is not equivalent to 9r.
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Clara states that r² + 5r + 3r is an equivalent expression to 9r. Why is Clara's statement incorrect...
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