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3 years ago

Pedro is supposed to practice piano for 4/6 an hour every day. Today, he has practiced for 2/6 of an hour.

Mathematics

2 answers:

shtirl [24]3 years ago

8 0

Answer:

2/6

Step-by-step explanation:

i got it right

Helen [10]3 years ago

5 0

Answer:

2/6 of an hour.

Step-by-step explanation:

He needs to practice 4/6 hours and has already practiced 2/6 hours. Subtract 2/6 from 4/6 which gives 2/6, the fraction of an hour he still needs to practice.

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What is the cirumference of a circle with a diameter of 4.1 cm

nordsb [41]

Answer:

C = 12.88

Step-by-step explanation:

If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. If you know the circumference of the circle, divide it by π to get the diameter.

C = π d = π · 4.1 = 12.88053cm

Glad to help ya!!

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3 years ago

What is the center and radius of the circle with equation x2 + y2 - 4x + 22y + 61 = 0?

lesantik [10]

Hello,

$x^2+y^2-4x+22y+61=0\\\\
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3 years ago

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SpyIntel [72]

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2 years ago

The sum of a number and 9 is -30

GrogVix [38]

-39+9=-30

-39 is your answer.

4 0

3 years ago

What 2 numbers multiply to be -14 and add to be -3

Svetach [21]

Xy = -14
x + y = -3

$xy = -14$
$\frac{xy}{x} = \frac{-14}{x}$
$y = \frac{-14}{x}$

$x + y = -3$
$x + \frac{-14}{x} = -3$
$\frac{x^{2}}{x} + \frac{-14}{x} = -3$
$\frac{x^{2} - 14}{x} = -3$
$x^{2} - 14 = -3x$
$x^{2} + 3x - 14 = 0$
$x = \frac{-(3) \± \sqrt{(3)^{2} - 4(1)(-14)}}{2(1)}$
$x = \frac{-3 \± \sqrt{9 + 56}}{2}$
$x = \frac{-3 \± \sqrt{65}}{2}$
$x = \frac{-3 \± 8.06}{2}$
$x = -1.5 \± 4.03$
$x = -1.5 + 4.03$ $or$ $x = -1.5 - 4.03$
$x = 2.53$ $or$ $x = -5.53$

  x + y = -3
2.53 + y = -3
- 2.53 - 2.53
  y = -5.53
  (x, y) = (2.53, -5.53)

x + y = -3
  -5.53 + y = -3
+ 5.53   + 5.53
  y = 2.53
  (x, y) = (-5.53, 2.53)

The two numbers that multiply to -14 and add up to -3 are -5.53 and 2.53.

8 0

3 years ago