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goldfiish [28.3K]
2 years ago
13

Which expression is equivalent to (5x - 4)2?

Mathematics
2 answers:
pogonyaev2 years ago
8 0

Answer:

10x-8

Step-by-step explanation:

Apply the distributive law: a(b-c)=ab-ac

a=2,b=5x.c=4

2x5x-2x4

simplify

=10x-8

Bond [772]2 years ago
7 0

Answer:

Step-by-step explanation:

the answer is 25x^2-40x+16

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Brian is 2 years older than Malachy. Caroline is 8 years younger than Malachy. If the total of their ages is 66, how old is the
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Answer:

The eldest of them is Brian and he is 24 + 2 = 26 years old.

Step-by-step explanation:

Let

Malachy age = a

Brian age = a + 2

Caroline age = a - 8

Total of their age = a + (a + 2) + (a - 8)

66 = a + (a + 2) + (a - 8)

collect like terms

66 = a + a + 2 + a - 8

66 = a + a + a - 6

3a = 66 + 6

3a = 72

divide both sides by 3

a = 72/3

a = 24

Malachy age is 24 . Caroline is 24 - 8 = 16 years old.

The eldest of them is Brian and he is 24 + 2 = 26 years old.

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3 years ago
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Answer:

Step-by-step explanation:

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