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2 years ago

Xm-2m if x=-2 and m=-3

Mathematics

1 answer:

swat322 years ago

3 0

The answer would be 12. (-2)(-3) = 6, then (2)(-3) is -6. 6-(-6) would be 6+6.

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X^2-8x+16 divided by ax-4x numerator

Vedmedyk [2.9K]

Answer:

Given:

1). $x^2-8x+16$ divided by $x-4$

⇒ $\frac{x^2-8x+16}{x-4}$

⇒ $\frac{x^2-2\times x\times 4+4^2}{x-4}$

By factorising numerator by using identity, $(a-b)^2=a^2-2\times a \times b +b^2$

⇒ $\frac{(x-4)^2}{x-4}$

⇒ $\frac{(x-4)\times(x-4)}{x-4}$

⇒ $x-4$ {Answer}

2). $3x^2y$ divided by $6xy^2$

⇒ $\frac{3x^2y}{6xy^2}$

⇒ $\frac{3\times x\times x\times y}{6\times x\times y\times y}$

⇒ $\frac{x}{2y}$ { Answer}

4 0

2 years ago

how many ounces of pure water must be added to 50 ounces of a 15% saline solution to make a saline solution that is 10% salt

anygoal [31]

50 ounces of 15% saline solution contains 0.15*50 = 7.5 ounces of salt.

Let x be the amount of pure water you add to this solution. Then you end up with (x + 50) ounces of this new solution. The amount of salt stays the same.

You want the new solution to have a concentration of 10%. This means you need

7.5 / (x + 50) = 0.1

==> 7.5 = 0.1(x + 50)

==> 7.5 = 0.1x + 5

==> 2.5 = 0.1x

==> 2.5/0.1 = 0.1x/0.1

==> x = 25

7 0

2 years ago

Solve the formula: V = 1/2 (bh) H for h

Semmy [17]

Times both sides b 2
2V=(bh)H
remember associative property
(ab)c=a(bc)
and
ab=ba
so
(bh)H=h(bH)

2V=h(bH)
divide both sides by bH
$\frac{2V}{bH} =h$

8 0

2 years ago

Can you help me please

xenn [34]

(2, -3)

The Answer is A

3 0

2 years ago

Six divided by fivehundredsevenysik

ELEN [110]

I think you mean six-hundred and seventy six.

6 ÷ 576 = 0.010416

or 0.0104166667

8 0

2 years ago