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juin [17]
3 years ago
12

3x+1y=6 2x-1y=-1 plz helpllllllllll

Mathematics
1 answer:
Gwar [14]3 years ago
4 0

Answer:

x=1 y=3

Step-by-step explanation:

3x+y=6 is the same as y=6-3x

2x-y=-1 is the same as y=2x+1

set them equal to each other

6-3x=2x+1

5x=5

x=1

substitute the value of x into either equation

y=2(1) +1

y=3

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What is J/-12 > 9??​
shtirl [24]

Answer:

j > - 108

Step-by-step explanation:

Step 1:

j / - 12 > 9          Equation

Step 2:

j > 9 × - 12         Multiply - 12 on both sides

Answer:

j > - 108

Hope This Helps :)

4 0
3 years ago
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Write an equation of a line that goes through the point (-9, 3), and is perpendicular to the line 3x + y = 5
Vlad [161]
To find the slope of the line, first find the slope of 3x + y = 5, and then its opposite reciprocal.

3x + y = 5
y = -3x + 5
the slope of 3x + y = 5 is -3.

the slope is -3, so the opposite reciprocal slope is 1/3.

the equation of any line is y = ax + b
to find this line, y = 3, x = -9, and the slope is 1/3.

3 = -9a + b
3 = -9 (1/3) + b
3 = -3 +b
b = 6

substitute a and b into the equation
y = ax + b
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the equation of the line is y = 1/3x + 6.


3 0
3 years ago
Pls answer question 9
Marina86 [1]
The correct answer would be B. Just did the math
6 0
3 years ago
if two angles of a triangle are complementary find the number of degrees in the third angle of the triangle
Norma-Jean [14]

Answer:

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Step-by-step explanation:

Let

A and B ----> two complementary angles in a triangle

C ---> the measure of the third angle in a triangle

we know that

If two angles are complementary, then their sum is equal to 90 degrees

so

A+B=90^o ---> equation A

Remember that

The sum of the interior angles in any triangle must be equal to 180 degrees

so

A+B+C=180^o ----> equation B

substitute equation A in equation B

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solve for C

subtract 90 degrees both sides

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therefore

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7 0
4 years ago
The perimeter of a rectangle is 68 cm. The length is 4 cm more than its
nadya68 [22]

Answer:

17

Step-by-step explanation:

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4 years ago
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