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3 years ago

Factor −1/9 out of −1/9x−3.

Mathematics

1 answer:

Zanzabum3 years ago

3 0

Answer:

-1/9 (x+27)

Step-by-step explanation:

Divide the whole expression by -1/9.

-1/9x becomes x

-3 becomes + 27

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It's a ven dyagram question pls help

slamgirl [31]

Answer:

a) A U B = {21,23,24,25,27,29,30,31 }

b) A n C = {24,30}

Step-by-step explanation:

A {21,24,27,30}

B {21,23,25,27,29,31}

C {20,22,24,26,28,30,32}

a) A U B = {21,23,24,25,27,29,30,31 }

b) A n C = {24,30}

5 0

2 years ago

Question is shown below.

Andrei [34K]

ANSWER

D. 4 minutes 40 seconds

EXPLANATION

The given data set showing the number of seconds of each song the playlist is:

283,204,198,229,173,230,168,236,215,204

Let the length of the 11th song be x.

Because he wants the mean to be 3 minutes 40 seconds, which is equal to 220 seconds, we write and solve the following equation for x.

$\frac{283 + 204 + 198 + 229 + 173 + 230 + 168 + 236 + 215 + 204 + x}{11} = 220$

$\frac{2140 + x}{11} = 220$

$2140 + x = 2420$

$x = 2420 - 2140$

$x = 280$

We convert 280 seconds to minutes.

$\frac{280}{60} = 4 \frac{2}{3} = 4mins : 40 sec$

The correct choice is D

3 0

3 years ago

If f(x)=3x + 2 and g(x)=2x - 2 what is (f-g)(x)?

omeli [17]

(3x+2)-(2x-2)
3x+2-2x-2
3x-2x=x
2-2+0
X

4 0

3 years ago

Sine, cosines and tangent of 30 45 and 60 degrees

bonufazy [111]

Answer:

Sine 30 =

$\frac{1}{2}$

Sine 45 =

$\sqrt{ \frac{2}{2} }$

Sine 60 =

$\sqrt{ \frac{3}{2} }$

Cos 30 =

$\sqrt{ \frac{3}{2} }$

Cos 45 =

$\sqrt{ \frac{2}{2} }$

Cos 60 =

$\frac{1}{2}$

Tan 30 =

$\sqrt{ \frac{3}{3} }$

Tan 45 =

$1$

Tan 60 =

$\sqrt{3}$

Step-by-step explanation:

I hope it helps

3 0

3 years ago

The value of a bike depreciates by 55% per year. Work out the current value of a bike bought 2 years ago for £1300.

nikitadnepr [17]

Year 1: 1,300 * 55% = 715 depreciation
1,300 - 715 = 585 book value

Year 2: 585 * 55% = 321.75 depreciation
585 - 321.75 = 263.25 book value

Year 3: 263.25 * 55% = 144.79 depreciation
263.25 - 144.79 = 118.46 book value

If the bike was bought 2 years ago, then its current value is $263.25.

Currently, it is the beginning of Year 3 but depreciation is computed at the end of the year.

7 0

3 years ago