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Mathematics

2 answers:

nikitadnepr [17]2 years ago

6 0

Answer:

E=5(m+c)

Step-by-step explanation:

Since Bryan earns $5 for every lawn mowed, the equation right now is 5m. We have to add the $5 for the cars washed, 5c.

5m+5c
That can be factored, 5(m+c)

Novay_Z [31]2 years ago

5 0

Answer

E = Mc2

Explain:

6392=39294=249293-239492=32949

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Why is -a² is always negative (a ≠ 0) and why is (-a)² is always positive?

hjlf

$-a^2=(-1)\cdot a\cdot a$

Regardless of the sign of $a$ , we have $a\cdot a=a^2\ge0$ (never negative). But multiplying by -1 makes it negative.

On the other hand,

$(-a)^2=((-1)\cdot a)^2=(-1)^2\cdot a^2=1\cdot a^2=a^2$

which can never be negative for real $a$ .

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Answer:

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