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yaroslaw [1]
2 years ago
7

Complete factorization for -20x - 5y

Mathematics
1 answer:
marusya05 [52]2 years ago
7 0

Answer:

-5 (4x+y)

Step-by-step explanation:

Factor out -5, and -20/-5=4, -5/-5=1.

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Find the inverse of each of the given functions. f(x) = 4x − 12 f−1(x) = x +
Dimas [21]

Step-by-step explanation:

Find the inverse of each of the given functions.

Answer

Inverse Function: ; Domain: ; Range:

Explanation

Find the inverse function: Inverse Function: ; Domain: ; Range:

Answer: Inverse Function: ; Domain: ; Range:

6 0
2 years ago
The ratio of boys to girls in a room is 4:9.<br> There are a total of 39 people in the room.
Mumz [18]

12 boys and 27 girls

1) Add 4 to 9. 13

2) 39 divided by 13 is 3

3)Multiple 3 to 4 boys and 9 girls. 3x4 is 12 boys, 3x9 is 27 girls

Hope this helps!

4 0
3 years ago
Read 2 more answers
The length of human pregnancies from conception to birth follows a distribution with mean 266 days and standard deviation 15 day
Katena32 [7]

Answer:

a) 81.5%

b) 95%

c) 75%

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 266 days

Standard Deviation, σ = 15 days

We are given that the distribution of  length of human pregnancies is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

a) P(between 236 and 281 days)

P(236 \leq x \leq 281)\\\\= P(\displaystyle\frac{236 - 266}{15} \leq z \leq \displaystyle\frac{281-266}{15})\\\\= P(-2 \leq z \leq 1)\\\\= P(z \leq 1) - P(z < -2)\\= 0.838 - 0.023 = 0.815 = 81.5\%

b) a) P(last between 236 and 296)

P(236 \leq x \leq 281)\\\\= P(\displaystyle\frac{236 - 266}{15} \leq z \leq \displaystyle\frac{296-266}{15})\\\\= P(-2 \leq z \leq 2)\\\\= P(z \leq 2) - P(z < -2)\\= 0.973 - 0.023 = 0.95 = 95\%

c) If the data is not normally distributed.

Then, according to Chebyshev's theorem, at least 1-\dfrac{1}{k^2}  data lies within k standard deviation of mean.

For k = 2

1-\dfrac{1}{(2)^2} = 75\%

Atleast 75% of data lies within two standard deviation for a non normal data.

Thus, atleast 75% of pregnancies last between 236 and 296 days approximately.

7 0
3 years ago
Can i get someone to answer this for me please?
denpristay [2]

Answer:

B, D and also E

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
When expressed as a decimal number which of the following is a repeating decimal
Kamila [148]

Answer:

8/9

Step-by-step explanation:

8/9 has a repeating decimal of 8. No matter how many times you divide it, you will get the answer 0.8888 and to infinty.

3 0
3 years ago
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