Is algebra.

Mathematics

1 answer:

aksik [14]3 years ago

4 0

Answer:

In the first one answer is r²

In second one answer is 3

Step-by-step explanation:

Yes it is Algebra with different powers

In first one (6r4+4r) +(__- 2r4 + 3r) = 4r4 + r2 + 7r

Like terms are added:

6r^4- 2r^4 + 4r + 3r +____ = 4r^4 + r2+ 7r

4r^4+7r +___ = 4r^4 + r^2 + 7r

Therefore ___ = r^2

In second one:

(__ -8x - x^2)-(4x^2 -7 +6x) = -5x^2 +14x +10

Open the brackets

__ -8x - x^2-4x^2 +7 -6x = -5x^2 +14x +10

Add like terms

__ -14x -5x^2 + 7= -5x^2 +14x +10

Therefore

___ + 7 = 10

___ = 10 -7 = 3

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What would the charge of an atom be if it has six protons and six electrons? a. about +12 c. 6 b. about -12 d. There is no charg

oee [108]

Answer:

d. There is no charge

Step-by-step explanation:

An atom of this nature with equal number of protons and neutrons will have no charge on them.

Protons are the positively charged particles in an atom
Electrons are negatively charged.
Neutrons carry no charges.

In an atom, when there is an imbalance between the number of protons and electrons, they become charged.

When the number of protons and electrons are the same, then, the atom becomes uncharged.

Charge = Number of protons - Number of electrons

Number of protons = 6

Number of electrons = 6

Charge = 6 - 6 = 0

So, the atom will have no charge on it.

3 0

3 years ago

Help with this question please!

Andre45 [30]

Answer:

$\large\boxed{x=2,\ -2}$

Step-by-step explanation:

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