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elena55 [62]
3 years ago
12

The probability of drawing a silver ball out of a certain bag is

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
7 0

Answer:2/3

Step-by-step explanation:

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X+ y + z = -3<br> 3y - Z = 4<br> 2x- y - 2z = -5
snow_lady [41]

Answer:

  • (-3, 1, -1)

Step-by-step explanation:

  • x + y + z = -3  --> (1)
  • 3y - z = 4   --> (2)
  • 2x - y - 2z = -5 --> (3)

<u>Add up (1) and (2)</u>

  • x + 3y + y + z - z = -3 + 4 ⇒ x + 4y = 1  --> (4)

<u>Double (2) and subtract from (3)</u>

  • 2x - y - 2z - 2(3y - z) = -5 - 2(4) ⇒ 2x - y - 2z - 6y + 2z = -5 - 8
  • 2x - 7y = -13 --> (5)

<u>Double (4) and subtract (5)</u>

  • 2(x + 4y) - 2x + 7y = 2 + 13 ⇒ 2x + 8y - 2x + 7y = 15 ⇒ 15y = 15 ⇒ y = 1

<u>Finding x</u>

  • x + 4(1) = 1 ⇒ x = 1 - 4  ⇒ x = -3

<u>Finding z</u>

  • -3 + 1 + z = -3 ⇒ z = -1

<u>So the answer is: </u>

  • (-3, 1, -1)

4 0
2 years ago
-Real, rational, irrational, whole, integers.
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The rational numbers will best define- The height of an airplane as it descends to an airport runway.

This is because it includes fractions as well.
Irrational, integers, whole numbers cannot be used in this situation.
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3 years ago
If 2 lines intersect then they in exactly one point
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<span>Postulate 1-2

I believe</span>
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Whitney has a total of 30 cupcakes for her guests. the function rule, 30 ÷ x where x is the number of guests, can be used to fin
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Line segment EF has a lenth if 5 units. It is translated 5 units to the right on a coordinate plane to obtain line segment E'F'.
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Please note translations are just movements on a axis, they are not changing the length of a segment at all. In fact, only dilations change the figure. The length of E'F' is going to be the same as the length of EF.
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