3 years ago

(x+4)−(x−1)

Mathematics

2 answers:

Gekata [30.6K]3 years ago

5 0

Answer:

There is no plug-in for x.

X=0.

(0+4) - (0-1) = [(4 - (-1)] = 5.

raketka [301]3 years ago

4 0

Answer:

Step-by-step explanation:

(x+4) -x +1

x - x = 0

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Use the Binomial Theorem to expand each binomial (5x-4y)^3

jek_recluse [69]

You should know that:

(a+b)(a+b)(a+b)

=a(a+b)(a+b)+b(a+b)(a+b)

=a(a²+2ab+b²)+b(a²+2ab+b²)

=a³+2a²b+ab²+a²b+2ab²+b³

=a³+3a²b+3ab²+b³

-----------------

If a=5x and b=-4y

(5x+(-4y))³

=(5x-4y)³

=(5x)³+3(5x)²(-4y)+3(5x)(-4y)²+(-4y)³

=125x³+3(25x²)(-4y)+15x(16y²)-64y³

=125x³+75x²(-4y)+240xy²-64y³

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5 0

3 years ago

Does anyone know this and if it is extraneous or not?

Anna11 [10]

Addd 4 to both sides
$\sqrt{x+9}=5$
sqare both sides
x+9=25
minus 9 both sides
x=16

plug it in for x and see
$\sqrt{16+9}-4=1$
$\sqrt{25}-4=1$
$5-4=1$
1=1
true

not extraneous
an extraneous root would be x=-34

5 0

3 years ago

Lillian works 7hours each day for 5 days a week she earn £420 each week how much does she earn per hour

frosja888 [35]

Answer:

£12 per hour

Step-by-step explanation:

7 × 5 = 35 hours

35 h : 420

1 h : x

x = 420×1 / 35

= £12 per hour

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4 years ago

Which ratio is equivalent to 3/15

Rzqust [24]

Answer:

Step-by-step explanation:

The ratio of 6:30 would be equivalent to it.

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3 years ago

Coordinates point a

Genrish500 [490]

I'm sorry cordinate what

6 0

3 years ago