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igomit [66]
2 years ago
10

I need help please!!!

Mathematics
1 answer:
HACTEHA [7]2 years ago
6 0

Answer:

A

Step-by-step explanation:

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Mathematics<br> Solve k - 120= 768 Find the value of k
Leona [35]

Answer:

k - 120 = 768

add 120 to both sides of the equation

k - 120 + 120 = 768 + 120

120 on the left hand side of the equation cancels therefore isolating the variable, k

k = 888

7 0
2 years ago
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Kelly buys a box of greeting cards for $13.00. Each individual card costs
Maksim231197 [3]

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13/.52=25

Step-by-step explanation:

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Find the solution to the following system using substitution or elimination: y = 3x + 7 y = -2x-3 O A. (1,10) O B. (-2,1) C. (1.
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Answer:

The answer is B

Step-by-step explanation:

Because I calculated properly and check my answer 2 times

trust me this is the answer

pls mark me as brainliest

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3 years ago
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The average life of individual is 70 years. With a standard deviation of 5.5 years. Assume that the lives of these individuals i
Harlamova29_29 [7]

Answer:

The answer is below

Step-by-step explanation:

Given that:

mean (μ) = 70 years, standard deviation (σ)= 5.5 years.

a) The z score measures how many standard deviation a raw score is above or below the mean. It is given as:

z=\frac{x-\mu}{\sigma}, for a sample size of n, the z score is: z=\frac{x-\mu}{\sigma/\sqrt{n} }

Given a sample of 5 turtles, we have to calculate the z score for x = 60 and x = 80.

For x = 60:

z=\frac{x-\mu}{\sigma/\sqrt{n} }=\frac{60-70}{5.5/\sqrt{5} } =-4.07

For x = 80:

z=\frac{x-\mu}{\sigma/\sqrt{n} }=\frac{80-70}{5.5/\sqrt{5} } =4.07

The probability that a mean life of a random sample of 5 such turtles falls between 60 and 80 years = P(60 < x < 80) = P(-4.07 < z < 4.07) = P(z < 4.07) - P(z < -4.07) = 1 - 0 = 1 = 100%

b) The z score that corresponds to top 10% is -1.28.

z=\frac{x-\mu}{\sigma/\sqrt{n} }\\\\-1.28=\frac{x-70}{5.5/\sqrt{5} }\\ x-70=-3\\x=70-3\\x=67\ years

3 0
3 years ago
The sum of 3 consecutive numbers equal 87, find the numbers
boyakko [2]

Answer:

28, 29, 30

Step-by-step explanation:

8 0
3 years ago
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