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ElenaW [278]
3 years ago
5

Factor 25-4z^2 im having trouble with a question

Mathematics
1 answer:
shepuryov [24]3 years ago
7 0

Answer:

(5-2z)(5+2z)

Step-by-step explanation:

25 -4z^2

Rewriting

5^2 - (2z)^2

This is the difference of squares  a^2 - b^2 = (a-b)(a+b)

(5-2z)(5+2z)

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Joe can clear a lot in 2.5 hours. His partner can do the same job in 7.5 hours. How long will it take them working together?
irina [24]

Answer:

The time required by both persons to complete the work T = 1.458 hours

Step-by-step explanation:

Given data

Time required by Joe to clear a lot T_1 = 2.5 hours

Time required by his partner to clear a lot T_2 = 2.5 hours

Time required by both persons to complete the work by working together

T = \frac{T_1 T_2}{T_1 + T_2}

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4 years ago
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malfutka [58]

Answer:

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4 years ago
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3 years ago
20% of the players on a hockey team are Canadian. If there are 35 players on the team, how many are Canadian?
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Step-by-step explanation:

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