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leonid [27]
3 years ago
5

10x+2 = 3x + 30 Find x (please)

Mathematics
1 answer:
Ganezh [65]3 years ago
7 0
Answer: x=4

10x-3x=30-2
7x=28
X=4
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Answer:

1 false

2 true

3 true

4 false

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Step-by-step explanation:

f(a) = (2a - 7 + a^2) and g(a) = (5 – a).

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When added together, they will be a second degree polynomial

2. true  When we add and subtract polynomials, we still get a polynomial, so it is closed under addition and subtraction

3.  true  f(a) + g(a) = (2a - 7 + a^2) + (5 – a)

Combining like terms = a^2 +a -2

4.  false   f(a) - g(a) = (2a - 7 + a^2) - (5 – a)

Distributing the minus sign (2a - 7 + a^2) - 5 + a

Combining like terms  a^2 +3a -12

5.  true  f(a)* g(a)  = (2a - 7 + a^2)  (5 – a).

Distribute

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                       10a -35a +5a^2 -2a^2 -7a +a^3

Combining like term

-a^3 + 3 a^2 + 17 a - 35

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