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3 years ago

4×9×8^-1×3^-3/6^-1 .Ans is 1 but I want the method.

Mathematics

2 answers:

lana66690 [7]3 years ago

5 0

Answer:

Hi, Hope this will help :-)

podryga [215]3 years ago

5 0

Answer:

1

Step-by-step explanation:

(4×9×8⁻¹×3⁻³)/6⁻¹ =

= (2²×3²×2⁻³×3⁻³)/2⁻¹×3⁻¹

= (2²×2⁻³×3²×3⁻³)/2⁻¹×3⁻¹

= 2⁻¹×3⁻¹/2⁻¹×3⁻¹

= 1

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The area of a circle is 43.25cm2. Find the length of the radius rounded to 2 DP.

Monica [59]

Answer:

3.71 cm

Step-by-step explanation:

Hi there!

Area of a circle equation: $A=\pi r^2$ where r is the radius

Plug in the area 43.25 cm²

$43.25=\pi r^2$

Divide both sides by π to isolate r²

$\frac{43.25}{\pi} =\frac{\pi r^2}{\pi} \\\frac{43.25}{\pi}=r^2$

Take the square root of both sides to isolate r

$\sqrt{\frac{43.25}{\pi}} =r\\3.71=r$

Therefore, the length of the radius rounded to 2 decimal points is 3.71 cm.

I hope this helps!

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3 years ago

Solve 2(4 x + 3) < 5 x + 21. { x | x < 9} { x | x > -5} { x | x > -9} { x | x < 5}

Nesterboy [21]

Answer:

x <5

Step-by-step explanation:

2(4 x + 3) < 5 x + 21

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Subtract 5x from each side

8x -5x +6 < 5x-5x+21

3x +6 < 21

Subtract 6 from each side

3x+6-6 <21-6

3x <15

Divide each side by 3

3x/3 <15/3

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3 years ago

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Yuliya22 [10]

Answer:

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Step-by-step explanation:

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3 years ago

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4×9×8^-1×3^-3/6^-1 .Ans is 1 but I want the method.​

4×9×8^-1×3^-3/6^-1 .Ans is 1 but I want the method.