If it takes 13 cup of flour to make 14 of a cake, how many cups of flour are needed to make a whole cake?
1 answer:
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Answer:
x = ± 2
Step-by-step explanation:
given
40 - x² = 0 ( add x² to both sides )
40 = x² or
x² = 40 ( take the square root of both sides )
x = ± = ±
= ± 2