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evablogger [386]
3 years ago
9

What is 5(z+4)+5(2-z)

Mathematics
1 answer:
Maru [420]3 years ago
4 0

Answer:

30

Step-by-step explanation:

5(z+4)+5(2-z)    (expand parentheses by distribution)

= z(5) + 4(5) + 2(5) -z(5)

= 5z + 20 + 10 -5z

= 30

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SVETLANKA909090 [29]

<u>Answer:</u>

The hand moved \bf \frac{3}{4} of a complete turn.

<u>Step-by-step explanation:</u>

The hand moved from 3 to 12, that is, it moved:

12 - 3 = 9 hours

In a clock, 12 hours represent a complete turn.

∴ Using the unitary method:

12 hours    ⇒     1 turn

1 hour        ⇒     \frac{1}{12} turns

9 hours     ⇒     \frac{1}{12}  × 9 = \frac{9}{12}

                                     = \bf \frac{3}{4} turns    (simplified)

∴ The hand moved \bf \frac{3}{4} of a complete turn.

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