3 years ago

Please answer these questions!!

Mathematics

1 answer:

Yuri [45]3 years ago

4 0

8. 240/3 = 80 km per hour

80*4 = 320 km answer is A

5.25 / 3 = 1.75 per kg answer is A.

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Miriam has a bag that contains 10 red marbles and 6 blue marbles. she chooses two marbles at random and does not replace them. w

dalvyx [7]

$|\Omega|=16\cdot15=240\\ |A|=6\cdot10=60\\\\ P(A)=\dfrac{60}{240}=\dfrac{1}{4}=25\%$

8 0

3 years ago

Help me pls!!! <br> 3x-2(6-x)=7x+2(5+x)-6

Strike441 [17]

$3x-2(6-x)=7x+2(5+x)-6\\3x-12+2x=7x+10+2x-6\\5x-12=9x+4\\-4x = 16\\x = -4$

Hope that helps!

8 0

3 years ago

Read 2 more answers

The average age of residents in a large residential retirement community is 69 years with standard deviation 5.8 years. A simple

frosja888 [35]

Answer:

a. of the central limit theorem.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean $\mu$ and standard deviation $\sigma$ , a large sample size, larger than 30, can be approximated to a normal distribution with mean $\mu$ and standard deviation $\frac{\sigma}{\sqrt{n}}$

In this problem, the sample size is 100, so it is sufficiently large to use the Central Limit Theorem. The mean of the sample in 69 and the standard deviation of the sample is 0.58.

So the correct answer is:

a. of the central limit theorem.

4 0

3 years ago

Simplify (3a^4b^3)^3

tatiyna

Answer:

Step-by-step explanation:

(3a^4b^3)^3

=3^3a^4*3b^3*3

=27a^12b^9

7 0