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3 years ago

7

-2 1/2 divided by 3 1/2

1 answer:

balu736 [363]3 years ago

6 0

Answer:-0.71428571428

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Insert grouping symbols in 5 x 2 + 8 - 4 - 2 so that its value is 15

Arlecino [84]

5×2+8-4+1=15
cause
5×2=10
10+8=18
18-4=14
14+1=15

5 0

4 years ago

The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated that 30% of adult Australian s

m_a_m_a [10]

Answer:

0.15% probability that more than 7 of them weigh 65 lb

Step-by-step explanation:

For each dog, there are only two possible outcomes. Either they weigh 65 pounds, or more, or they do not. The probability of a dog weighing 65 pounds or more is independent of other dogs. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

30% of adult Australian sheep dogs weigh 65 pounds or more.

This means that $p = 0.3$

Sample of 10 adults dogs.

This means that $n = 10$

What is the probability that more than 7 of them weigh 65 lb

This is

$P(X > 7) = P(X = 8) + P(X = 9) + P(X = 10)$

In which

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 8) = C_{10,8}.(0.3)^{8}.(0.7)^{2} = 0.0014$

$P(X = 9) = C_{10,9}.(0.3)^{9}.(0.7)^{1} = 0.0001$

$P(X = 10) = C_{10,10}.(0.3)^{10}.(0.7)^{0} \cong 0$

$P(X > 7) = P(X = 8) + P(X = 9) + P(X = 10) = 0.0014 + 0.0001 + 0 = 0.0015$

0.15% probability that more than 7 of them weigh 65 lb

7 0

3 years ago

Complete the missing value?

dolphi86 [110]

Answer:

(3, 3 )

Step-by-step explanation:

Given

y = 4x - 9 and that x = 3 is part of the solution, then

y = 4(3) - 9 = 12 - 9 = 3 ← missing value in the solution

solution is (3, 3 )

5 0

3 years ago

a forest ranger can see for a distance of 12 miles from a firetower. how many square miles can he observe?

Zolol [24]

That would be a circle whose radius is 12 miles

= pi * 12^2 = 144pi = 452.4 sq miles to nearest tenth.

6 0

4 years ago

The coordinate of a figure is (1,5). What will be the new coordinate after a dilation with a scale factor of 4/5?

maria [59]

Answer:

i am troll you shall be thou trolled

Step-by-step explanation:

8 0

3 years ago