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lapo4ka [179]
3 years ago
7

A bag contains 4 blue and 5 red counters. Two counters are chosen at random without replacement. What is the probability that th

e counters are both red?
Mathematics
1 answer:
jeka943 years ago
6 0

Answer:

P(both are red) = 5/18

Step-by-step explanation:

total counters = 9

red counters = 5

P(both red) = P(R1) n P(R2)

5/9 * 4/8 =5/18

5/9 because the red counters are 5 and the total number of counters are 9.

I multiplied by 4/8 because, after selecting the first red counter without replacement, the remaining is 4 and the total decreases to 8.

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. y=-3x2 + bx + c; (1, 0) <br> find the unknown coefficients
aleksley [76]

Answer:

y =  - 3 {x}^{2}  + bx + c \\ when \: (1,0) \\ 0 =  - 3( {1})^{2}  + b(1) + c \\ 0 =  - 3 + b + c \\ b + c = 3 -  -  - (.) \\ at \: (0,0) \\ 0 = c \\ c = 0 \\ hence \: b = 3

8 0
3 years ago
Which process contributes to the formation of tornados? a. water droplets freeze, giving off energy b. the storm begins to rotat
Mashutka [201]

Answer:

D. A cold, dry air mass interacts with a warm, moist air mass.

Step-by-step explanation:

Tornadoes are very scary and kind of cool to look at. They have a great scientific reason behind them which we can easily understand.  First, a funnel cloud forms that reaches down to the ground (you probably have seen this in video as a cloud that is heavily densed and circling). Then , warm air rises, resulting in a decrease in air pressure and finally, a cold, dry air mass interacts with a warm, moist air mass.

6 0
3 years ago
Put the following equation in slope-intercept form: 2x+4y=12
guajiro [1.7K]
Y=-1/2x+3 is the slope intercept form.
4 0
3 years ago
What is 25% of 400 5% of 20
stiks02 [169]

Hello there!


What is 25% of 400?

\frac{25*400}{100}

= \frac{10,000}{100}

= 100

Thus,

25% of 400 is 100


What is 5% of 20?

Well, we just need to follow the previous steps.

\frac{5*20}{100}

= \frac{100}{100} = 1

Thus,

5% of 20 is 1


I hope this answer helps. Let me know if you have additional questions about the answer. As always, it is my pleasure helping student like you.


5 0
3 years ago
Question 2
shutvik [7]

9514 1404 393

Answer:

  45°, 45°, 90°

Step-by-step explanation:

If the difference of two angles is 0°, then they are congruent, and the triangle is isosceles.

The angle measures of the isosceles right triangle are 45°, 45°, 90°.

5 0
3 years ago
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