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STatiana [176]
2 years ago
12

One ball is selected at random from a bag containing 12 balls of which x are white

Mathematics
1 answer:
damaskus [11]2 years ago
7 0

Answer:

a) 12/18

b) 6

Step-by-step explanation:

If adding 6 white balls doubles the probability then the original amount of balls is 6 and with the new amount of 18, the likelihood of picking a white ball becomes 12/18.

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Myra wants to practice the piano for at least 22 minutes each day. Which of the following inequalities represents the number of
schepotkina [342]

Answer:

x\geq 22

Step-by-step explanation:

If someone wants to practice for at least 22 minutes a day, they want to practice 22 minutes or more. This is the same as greater than or equal to, and  we want the minutes practices to be greater than or equal to 22. We can assume minutes practiced is x, and create the inequality x\geq 22.

Hope this helped!

4 0
4 years ago
Five children have to form a queue. In how many different ways can they be arranged?
Paladinen [302]

Answer:

120 different ways

The total number of ways to do this is the product because of the fundamental counting principle[1]. So 5x4x3x2x1 = 5! (read as “5 factorial”[2]) = 120 different ways to line up those 5 people. Five people lining up essentially means 5 people sorting into 5 positions.

8 0
3 years ago
A regular hexagonal prism has a volume of 160 cubic meters. Its base has a perimeter of 30 meters and an area of 64 square meter
valkas [14]
We know that

[volume of a <span>regular hexagonal prism]=[area of the base]*height
height=volume/area of the base
h=160/64-----> 2.5 m

[surface area </span><span>hexagonal prism]=2*[area of the base]+[perimeter of base]*h
</span>[surface area hexagonal prism]=2*[64]+[30]*2.5----> 203 m²

the answer is
203 m²
5 0
4 years ago
Tiffany answered 80% of the questions on her math test correctly. There were 40 questions. How many questions did Tiffany get co
Harlamova29_29 [7]
Tiffany answered 32 questions correctly since 32/40 is .80
7 0
4 years ago
The table shows conversions of common units of length.
fgiga [73]

Answer:

0.50 miles


Step-by-step explanation:

<em>We can use two unit converters to solve this problem.</em>

  • 1 mile = 1.61 kilometers, and
  • 1000 meters = 1 kilometers

<em>Thus, we can setup the ratio below and solve:</em>

800 Meter*\frac{1Kilometer}{1000Meter}*\frac{1Mile}{1.61Kilometer}\\=\frac{800*1*1}{1000*1.61}Mile\\=\frac{800}{1610}Mile\\=0.497Mile

Rounding to 2 decimal places, 800 meters = 0.50 miles.

8 0
4 years ago
Read 2 more answers
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