Question

NEED NOW!!! WILL GIVE BRAINLIEST!!! 17-19!!!

Answer 1

For the given systems of equations, we have that:

17. The solution is: x = 3, y = 4.

18. The company can afford to promote 2 engineers to level II.

19. The substitution method was used, as writing x as a function of y in the given equation was quite straight forward, as was replacing into the second equation to find y.

What is a system of equations?

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

For item 17, the system is:

• 3x + 2y = 17.

• 4x - 2y = 4.

Adding the equations, we can eliminate y and solve for x, hence:

7x = 21

x = 3.

Then the solution for y is given as follows:

3x + 2y = 17

3(3) + 2y = 17

2y = 8

y = 4.

For item 18, the variables are given as follows:

• Variable x: number of level I engineers.

• Variable y: number of level II engineers.

The company has 8 engineers, hence:

x + y = 8 -> x = 8 - y.

The company can afford to pay a total of $472,000 to the engineers, hence, considering the salaries(in thousands of dollars) of each:

56x + 68y = 472.

We want to solve for y, hence, since x = 8 - y:

56x + 68y = 472.

56(8 - y) + 68y = 472.

12y = 24.

y = 2.

The company can afford to promote 2 engineers to level II.

The substitution method was used, as writing x as a function of y in the given equation was quite straight forward, as was replacing into the second equation to find y.

More can be learned about a system of equations at brainly.com/question/24342899

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Answer 2

Answer:

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