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inn [45]
3 years ago
12

there are 4 red and 8 blue marbles in a bag, Mark draws a blue marble out of the bag and does not replace it. Mark draws a secon

d blue marble out of the bag and does not replace it. what is the probability that the next marble he draws will also be blue,
Mathematics
2 answers:
NISA [10]3 years ago
8 0

Answer:3/5

Step-by-step explanation:when he takes one marble it’s 7/11 and when he takes another it’s 6/10 so simplify and you get 3/5

Andrews [41]3 years ago
6 0

Answer:

Step-by-step explanation:

Answer:3/5

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Please help!! I don’t understand how to do this problem
Oxana [17]

Answer:

D.

Step-by-step explanation:

y  = 3x \\ \frac{y}{3} = x \\   \\  \frac{3y}{3}  + 2y = 45 \\ y + 2y = 45 \\ 3y = 45 \\ y =  \frac{45}{3} \\ y = 15 \\  \\ x =  \frac{y}{3}  \\  =  \frac{15}{3}  \\  = 5

5 0
3 years ago
An angle measures 48.4° less than the measure of its complementary angle. What is the measure of each angle?
Gennadij [26K]

Answer:

The angles are 69.2 degrees and 20.8 degrees

Step-by-step explanation:

Complementary angles, when added together, = 90°

We’ll call the first unknown angle a and the second angle b

b = a - 48.4

a + b = 90

So let’s substitute in for b in the second equation:

a + a - 48.4 = 90

2a - 48.4 = 90

2a = 138.4

a = 69.2

69.2 - 48.4 = 20.8 = b

Now, does a + b = 90?

69.2 + 20.8 = 90

Lmk if you have questions

3 0
3 years ago
If x = 2 and y = 3, then 4x​
wariber [46]

Answer: 8

Step-by-step explanation: Substituting x for 2 since we know the value, 4(2) is 8.

8 0
3 years ago
Read 2 more answers
Someone helpp !! I don’t understand this at all
Naddika [18.5K]

Answer:

∠AB=9

Step-by-step explanation:

<em>the pyagrothyes therom= </em>a^{2}<em>+</em>b^{2}<em>=</em>c^{2}

<em>to find ∠AB we need to find the height of the triangle.</em>

<em>replace the variables:</em>

a^{2}<em>+</em>6^{2}<em>=</em>9^{2}

<em>=</em>9^{2}<em>-</em>6^{2}<em>=</em>a^{2}

<em>simplify:</em>

<em>81-36=</em>\sqrt{45}

<em>now we solve for ∠AB</em>

<em>replace the variables:</em>

6^{2}<em>+</em>\sqrt{45}<em>=</em>c^{2}

<em>simplify:</em>

<em>36+45=</em>\sqrt{81}

\sqrt{81}<em>=9</em>

I hope this helps you!!

have a nice day!!

4 0
3 years ago
The radius and height of a cone are 8 cm and 15 cm respectively find its curved surface are
drek231 [11]

Answer:

Curved surface area of a cone =πrl.

3.142×8×15=377.04cm

8 0
3 years ago
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