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Sonja [21]
3 years ago
10

Solve the system of linear equations using elimination.

Mathematics
2 answers:
Vanyuwa [196]3 years ago
8 0

Answer:

Step-by-step explanation:

A

Irina18 [472]3 years ago
7 0

Answer:

X= -5, Y= 16/3

Step-by-step explanation:

Okay, first line dem up:

-5x+3y=-19

-x-3y=-11

We can add, so -5x plus -x is -6x Y gets cancelled out, and -19 plus -11 is -30. So our equation is:

-6x=-30

This means that x equals -5, and now we substitute the answer in an equation to find "y". I chose equation 2. So with x factored in, it's:

5-3y=-11

Subtract both sides by 5.

-3y=-16

And we get: y= 16/3

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The proportion of employees in entry-level positions at the company who earn at least $ 42,000 will be 0.48466.

<h3>What is a normal distribution?</h3>

The Gaussian distribution is another name for it. The most significant continuous probability distribution is this one. Because the curve resembles a bell, it is also known as a bell curve.

According to a recent survey, the salaries of entry-level positions at a large company have a mean of $ 41,750 and a standard deviation of $ 6500.

Assuming that the salaries of these entry-level positions are normally distributed.

Then the proportion of employees in entry-level positions at the company who earn at least $ 42,000 will be

The z-score is given as

z = (x - μ) / σ

Then we have

z = (42000 - 41750) / 6500

z = 0.03846

Then we have

P(x ≥ 42000) = P(z ≥ 0.03846)

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P(x ≥ 42000) = 1 - 0.51534

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More about the normal distribution link is given below.

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6 0
2 years ago
What is another way of expressing 100
Artyom0805 [142]

Answer:

scientific notation?? 10^2

Step-by-step explanation:

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Calculate the calories lost when 85 g of water cools from 45 degrees Celsius to 23 degrees Celsius
Leto [7]

The amount of heat lost by the water is 1870 calories

Step-by-step explanation:

The amount of heat released by a substance is given by the equation

Q=mC\Delta T

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In this problem, we have:

m = 85 g is the mass of water

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\Delta T = 23-45=-22^{\circ}C is the change in temperature of the water

Substituting, we find

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5 0
4 years ago
A company uses a computer program to create coupon codes for customers to use on its website. The codes are made up from the sym
Sveta_85 [38]
Probability=number of specific outcomes/total number of possible outcomes

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