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Olegator [25]
3 years ago
14

PLEASE I NEED HELP RN use the elimination method to solve. -7x+y=-19 -2x+3y=-19

Mathematics
1 answer:
-BARSIC- [3]3 years ago
8 0

Answer:

  (x, y) = (2, -5)

Step-by-step explanation:

The coefficient of y in the second equation is an integer multiple of the coefficient in the first equation, so it is convenient to eliminate y. Subtracting 3 times the first equation from the second, we have ...

  (-2x +3y) -3(-7x +y) = (-19) -3(-19)

  -2x +3y +21x -3y = -19 +57 . . . . . . . eliminate parentheses

  19x = 38 . . . . . . . . . simplify

  x = 2 . . . . . . . divide by 19

  -7(2) +y = -19 . . . . . substitute for x in the first equation

  y = -5 . . . . . . add 14

The solution is (x, y) = (2, -5).

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He could be using either his bicycle, scooter, and the car. He could also be at either the school, garden or theatre. There are 3 possible methods of his transportation and places he could be. So Your Answer is 3.
7 0
4 years ago
Given that 5x - 8y = 33 find x when y = 1
fenix001 [56]

Answer:

<h3><u>x = ⁴¹⁄₅ or 8.2</u></h3>

Explanation:

5x - 8y = 33

y = 1

<em>Insert 1 for 'y' in the equation</em>

5x - 8(1) = 33

<em>Remove parenthesis: (a) = a</em>

5x - 8 · 1 = 33

<em>Multiply 8 · 1: 8</em>

5x - 8 = 33

<em>Add 8 to both sides</em>

5x - 8 + 8 = 33 + 8

Simplify

5x = 41

<em>Divide both sides by 5</em>

5x / 5 = 41 / 5

x = ⁴¹⁄₅

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x = 8.2

7 0
3 years ago
What's the square root of 20 to the nearest tenth
denpristay [2]
The answer is 4.5. Hope this helps.
6 0
3 years ago
Read 2 more answers
The slope of the line below is 2. Write a point-slope equation of the line using the coordinates of the labeled point( 3,10)
DiKsa [7]

Answer:

Point slope form of the line is  y-10=2(x-3)


Step-by-step explanation:

The point-slope form of a line is given as:

y-y_1=m(x-x_1)

Where,

  • m is the slope, and
  • (x_1,y_1) is the x point and y point respectively

<em>The question tells us the slope is 2, hence m=2 and the point given is (3,10) which means x_1=3 and y_1=10. Substituting these values into the </em><em>point slope form of a line </em><em>gives us:</em>

y-(10)=2(x-(3))\\y-10=2(x-3)

Hence, point slope form of the line is  y-10=2(x-3)


8 0
3 years ago
Put the equation y+x^2-10+16 in the form y=(x-h)^2+k
GenaCL600 [577]

Answer:

Step-by-step explanation:

hello :

y=x²-10x+16  in the form y=(x-h)²+k

y= x²-2(5)(x)+16  

y = x²-2(5)(x)+5²-9

y= (x-5)²-9    when h=5 and k = -9

7 0
3 years ago
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