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nikdorinn [45]
3 years ago
8

-x-8y=-18 x +9y=21 A) (-6,3) B) (6, -3) c) (6,9) D) (6,3)

Mathematics
1 answer:
gavmur [86]3 years ago
7 0

Answer:

A) (-6,3)

Step-by-step explanation:

-x-8y=-18

x +9y=21

Add the two equations together to eliminate x

-x-8y=-18

x +9y=21

-------------------

y = 3

Now we need to find x

x +9y = 21

Substitute in y

x +9(3)  =21

x+27 = 21

Subtract 27 from each side

x+27-27 = 21-27

x = -6

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Step-by-step explanation:

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3 years ago
A car park is full. 1/3 of the cars leave.60% of the cars are red. There are 174 red cars. How many cars are left in the car par
juin [17]

Answer:

290

Step-by-step explanation:

60% of ⅔X = 174

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5 0
3 years ago
Read 2 more answers
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Katyanochek1 [597]

Answer:

x= -36/5, which is also -7.2

Step-by-step explanation:

you can solve this equation by multiplying both sides of the equation by -6/5

hope it helps

5 0
2 years ago
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Which of the following is the solution to the equation 2/3 over 3x = 12?
andrey2020 [161]

Answer:

<u>x = 54 and none of the alternatives given is correct</u>

Step-by-step explanation:

Let's solve for x in the equation given, this way:

2/3 ÷ 3x = 12

2/3 * x/3 = 12

2x/9 = 12

2x = 108

x = 108/2 = 54

Proof of x = 54

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<u>x = 54 and none of the alternatives given is correct</u>

7 0
3 years ago
Find the slope of the line through the. Given points 1,2 7,7
olasank [31]

Good morning ☕️

Answer:

\frac{5}{6}

Step-by-step explanation:

the line passes through the points (1 , 2) and  (7 , 7)

then

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____________

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7 0
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