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Black_prince [1.1K]
3 years ago
7

ExampleUsing SubstitutionSolve using substitution. y = - 4x + 8y = x + 7​

Mathematics
1 answer:
Luda [366]3 years ago
5 0
My work for your question.

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Car mart pays $110,000 rent each year for its two-story building. the space in this building is occupied by five departments as
Anvisha [2.4K]

First floor:

paint department 1,575 square feet

space engine department 2,925 square feet

Total = 4,500 square feet

 

Second floor:

space window department 1,845 square feet

electrical department 765 square feet

accessory department 1,890 square feet

Total = 4,500 square feet

 

Since 70% is allocated to the 1st floor, therefore the floor is receiving:

First floor expense = $110,000 * 0.70 = $77,000

Second floor expense = $110,000 - $77,000 = $33,000

 

The expense for each department is the proportion on the total expense per floor.

First floor:

paint department = (1575/4500) * 77,000 = $26,950

space engine department = 77,000 – 26,950 = $50,050

 

Second floor:

space window department = (1845/4500) * 33,000 = $13,530

electrical department = (765/4500) * 33,000 = $5,610

accessory department = 33,000 – 13530 – 5610 = $13,860

6 0
3 years ago
The quotient of a number and - 2/3 is -9/10.
Ad libitum [116K]
It would be: -2/3 * -9/10 = 18/30 = 3/5

So, option B is your answer.

Hope this helps!
6 0
3 years ago
Read 2 more answers
Solve.<br><br> x^-9 y^3 / x^-7 y^8
aniked [119]

\dfrac{x^{-9}y^3}{x^{-7}y^8}=x^{-9-(-7)}y^{3-8}=x^{-2}y^{-5}=\dfrac{1}{x^2y^5}\\\\Used:\\\\\dfrac{a^n}{a^m}=a^{n-m}\\\\a^{-n}=\dfrac{1}{a^n}

3 0
4 years ago
Simplify m - {n - [p + (m + n - p)]}.
Lemur [1.5K]
This expression is actually pretty easy to simplify. Since all of the actions taking place are either addition or subtraction, we can initiate the first step of removing all the parentheses/brackets from the expression.

m - {n - [p + (m + n - p)]} 

simplifies to 

m - n - p + m + n - p

Then, we can reorganize the expression so that like terms are next to each other, making it easier to combine the like terms, which will be the next step.

m + m - n + n - p - p

Then, we combine like terms, keeping careful watch over addition and subtaction signs.

2m - 2p 

(The n's cancel out because one is negative and the other is positive)

m - {n - [p + (m + n - p)]} simplifies to 2m - 2p.
Hope that helped =)
8 0
3 years ago
Please Help me with this question
Olegator [25]

Answer:

look up mixed numbers calculator by calculator soup, and then you can find all of your answers! Its an amazing website! good luck (:

Step-by-step explanation:

5 0
3 years ago
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