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wel
4 years ago
15

3x-9y=9 -3x+4y=14 (1,-3) (6,1) (1,-8)

Mathematics
1 answer:
DENIUS [597]4 years ago
6 0
3x - 9y = 9
-3x + 4y = -14

-5y = -5

y = 1

3x - 9(1) = 9

3x - 9 = 9

3x = 18

x = 6

So, the answer is (6, 1)
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A parking lot charges $3 to park a car for the first hour and $2 per hour after that. If you use more than one parking space, th
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Given, a parking lot charges $3 for first hour and $2 per hour after that.

So for t hours, the parking lot charges $3 for the first hour and after first hour there is (t-1) hours left.

So for (t-1) hours it will charge $2 per hour.

The charges for (t-1) hours = $2(t-1).

Total charges for t hours for one car = $(3+2(t-1))

Now for the second car, it will charge 75% of the first car.

So the charges for second car

=$[ (3+2(t-1))(75/100)]

=$0.75(3+2(t-1))

There are 3 cars. That parking charges for the third car is also 75% of the first car.

So for third car the parking charges are same as for the second car.

Total parking charges for 3 cars

= $(3+2(t-1))+(0.75(3+2(t-1))+(0.75(3+2(t-1))

= $(3+2(t-1))+(0.75)(2(3+2(t-1))

We have got the required answer here.

The correct option is option C.

8 0
3 years ago
Number of Cans
Ainat [17]

Answer:

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5 0
3 years ago
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Answer:

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Step-by-step explanation:

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I will mark brainliest!<br><br> y = -9x slope and y intercept
Ivanshal [37]

Answer:

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Step-by-step explanation:

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For the following questions, use the system of equations. 3x + 2y = 14, 2x - 4y = 4. A. Solve the system of equations using eith
Irina18 [472]

Answer:

not the matrix equation but this works

x=4, y=1

Step-by-step explanation:

2x-4y=4             (original equation)

2(3x+2y=14)       (do this so that you can subtract or add- it's still equal)

2x-4y=4             (original equation)

6x+4y=28          (after multiplying)

8x=32                (add 2 equations together to cancel out 4y, can also subtract)

x=4                     (division)

2(4)-4y=4           (substitution)

8-4y=4               (multiplication)

4y=4                  (addition/subtraction)

y=1                     (division)

8 0
4 years ago
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