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3 years ago

17. Simplify (3 × 22) ÷ 6 + [28 – (4)2] = ?

Mathematics

1 answer:

Effectus [21]3 years ago

7 0

Answer:

Step-by-step explanation:

(3*22=66) / 6 + [28n - (4)2=20]

66 /6 = 11+ [20]

11+20= 31

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Helpenejiriehdisnsjsos

Evgesh-ka [11]

Answer:

$2 + \sqrt{3}$

Step-by-step explanation:

$\dfrac{1}{\sqrt{4} - \sqrt{3}} =$

$= \dfrac{1}{2 - \sqrt{3}}$

$= \dfrac{1}{2 - \sqrt{3}} \times \dfrac{2 + \sqrt{3}}{2 + \sqrt{3}}$

$= \dfrac{2 + \sqrt{3}}{(2 - \sqrt{3})(2 + \sqrt{3})}$

$= \dfrac{2 + \sqrt{3}}{4 - 3}$

$= \dfrac{2 + \sqrt{3}}{1}$

$= 2 + \sqrt{3}$

8 0

2 years ago

What is the average rate of change from x = −1 to x = 1? −4 −2 2 4

UkoKoshka [18]

The answer of average rate o change is 2. Hope it help!

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3 years ago

Ella bought some key chains and spent a total of $24.Each key chain cost the same whole-dollar amount.She bought between 7 and 1

Dennis_Churaev [7]

Ella bought 9 key chains

4 0

3 years ago

Two stands at a craft fair sell cone-shaped candles. They are made by pouring wax into a mold. Booth A sells a candle with a rad

frez [133]

In order to compare the amount of wax, you have to calculate the volume of both candles.

Candle of booth A = πr² h/3
A = π * 4² * 6/3
A = π * 16 * 2
A = 32π

Now, Candle of Booth B = π * 5² * 5/3
B = π * 25 * 5/3
B = 41.6π

In short, Booth B sells the candle with more wax.

Hope this helps!

6 0

2 years ago

PLEASE HELP NOW! I WILL MARK BRAINLIEST!

Natasha_Volkova [10]

Answer:

17 units

Step-by-step explanation:

Given 2 congruent chords in the circle, then they are equidistant from the centre and perpendicular

There is a right triangle formed by legs 15 and 8, with radius r being the hypotenuse.

Using Pythagoras' identity in this right angle

r² = 15² + 8² = 225 + 64 = 289 ( take the square root of both sides )

r = $\sqrt{289}$ = 17

7 0

2 years ago