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3 years ago

What number is four times as many as 25

Mathematics

1 answer:

Nana76 [90]3 years ago

7 0

Answer:

100

Step-by-step explanation:

4 x 25 = 100

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In which quadrant is the number 6 – 8i located on the complex plane?

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Answer: b

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Can you help me solve these

Diano4ka-milaya [45]

Answer:

1. y = 5 - 2x

2. b = a - 3

3. x = 5y - 12

4. c = (12+7d)/3

5. y = (24-4x)/3

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3 years ago

The figure shows a cylinder of diameter 12cm and height = 15cm. A hole in the shape of cone is bored into one of its end. If the

Lisa [10]

Answer:

$\bold{495\pi} \approx \bold{1555.088 cm^3}$

Step-by-step explanation:

There was no figure but the question is clear

Volume of a cylinder is given by the formula $\bold{\pi r^2h}\\$

where r is radius of base of cylinder, h is the height

Volume of a cone is given by $\bold{\frac{1}{3} \pi r^2 h}$

where r is the radius of base of cone, h is the height

The radius of the cylinder = $\frac{1}{2}$ (diameter) = $\frac{1}{2}$ (12) = 6cm

Height of cylinder = 15cm

Volume of cylinder $V_{cyl} = \pi (6)^2 15 = \pi (36)15 = \bold{540\pi}$

Radius of cone = $\frac{1}{2}$ (radius of cylinder) = $\frac{1}{2}$ (6) = 3 cm

Height of cone same as height of cylinder = 15cm

Volume of cone, $V_{cone} = \frac{1}{3}\pi r^2 h = \frac{1}{3}\pi (3)^2 15 = \frac{1}{3}(9)15\pi = \bold{45\pi}\\$

Difference is the volume of the remaining solid

$V_{cyl} - V_{cone} = 540\pi - 45\pi = \bold{495\pi} \approx \bold{1555.088 cm^3}$

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1 year ago

Help me pleas. And no bots. :)

andreev551 [17]

Answer:

1st is B

2nd is A

3rd is D

last is C

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