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3 years ago

Solve for z: −0.25z=−1.25 z=?

Mathematics

1 answer:

lakkis [162]3 years ago

7 0

$- 0.25z = - 1.25 \\ \Leftrightarrow \: z = \frac{ - 1.25}{ - 0.25} = \frac{ - \frac{5}{4} }{ - \frac{1}{4} } = 5$

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Chandani purchased some parrots. 20% flew away and 5% died. Of the remaining, 45% were sold. Now 33 parrots remain. How many par

Paha777 [63]

Answer:

80 parrots were purchased.

Step-by-step explanation:

Let the total number of parrots be k.

If 20% (or 20/100 = 1/5) flew away and 5% (5/100 = 1/20) died, the remaining parrots will be k – (¹/₅k + ¹/₂₀k) = k – ¼k = ¾k.

Of the remaining, 45% (or 45/100 = 9/20) were sold, which means the total number of sold parrots will be ¾k × ⁹/₂₀ = ²⁷/₈₀k.

The remaining parrots = ¾k – ²⁷/₈₀k = ³³/₈₀k = 33

k = 33 × ⁸⁰/₃₃ = 80 parrots were purchased.

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3 years ago

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You run 18 miles in 2 hours and 45 miles in 5 hours how fast are you running

Lesechka [4]

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snow_tiger [21]

Answer:

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