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TEA [102]
3 years ago
10

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.

8 0
3 years ago
Can someone help me solve this
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4 0
2 years ago
Read 2 more answers
You run 18 miles in 2 hours and 45 miles in 5 hours how fast are you running
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So let's find the unit rate of these.

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snow_tiger [21]

Answer:

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Step-by-step explanation:

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