Solve the system of equations - 4x + 5y = 35 and - 2 + 2y = 8 by combining the equations.

Mathematics

2 answers:

Strike441 [17]3 years ago

8 0

Answer:

$- 5x + 7y = 43$

Delicious77 [7]3 years ago

4 0

X= -5/2 y = 5

Solve the equation for y

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The cost to install x number of central air conditioning units for a company is given by the function C(x) = 4000x +1300/3 Use t

Vesna [10]

Given:

The cost to install x number of central air conditioning units for a company is given by the function

$C(x)=\dfrac{4000x+1300}{3}$

To find:

The cost to install 45 air conditioners.

Solution:

We have,

$C(x)=\dfrac{4000x+1300}{3}$

Putting x=45, we get

$C(45)=\dfrac{4000(45)+1300}{3}$

$C(45)=\dfrac{180000+1300}{3}$

$C(45)=\dfrac{181300}{3}$

$C(45)=60433.3333...$

$C(45)\approx 60433.33$

Therefore, the cost to install 45 air conditioners is $60433.33.

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2 years ago

Sofia can type the work in 10 hours. Noga can do it in 15 hours. They work together for 4 hours. Then Sofia left and Noga finish

sweet [91]

Answer:

4 hours

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Find q<br> (7q-46)<br> (3q+6)

kap26 [50]

Answer:

$q = 22$

Step-by-step explanation:

The angle measure of a straight line is (180) degrees As given in the picture, line (AC) is a straight line, thus its angle measure is (180) degrees. Angles (ABD) and (DBC) make up line (AC). Therefore, one can conclude that the sum of angles (ABD) and (DBC) is (180) degrees. Form an equation, simplify and use inverse operations to solve for the unknown parameter (q).

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