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vredina [299]
3 years ago
11

Use the substitution method to solve the system of equations. Choose the

Mathematics
1 answer:
bixtya [17]3 years ago
4 0

Answer:

C

Step-by-step explanation:

Given the 2 equations

2x - y = 10 → (1)

2x - 2y = 4 → (2)

Rearrange (2) expressing 2x in terms of y by adding 2y to both sides

2x = 4 + 2y

Substitute 2x = 4 + 2y into (1)

4 + 2y - y = 10, that is

4 + y = 10 ( subtract 4 from both sides )

y = 6

Substitute y = 6 into either of the 2 equations and solve for x

Using (1)

2x - 6 = 10 ( add 6 to both sides )

2x = 16 ( divide both sides by 2 )

x = 8

Solution is (8, 6 ) → C

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Polygon YYY is a scaled copy of Polygon XXX using a scale factor of \dfrac13 3 1 ? start fraction, 1, divided by, 3, end fractio
gtnhenbr [62]

Answer:

1/9

Step-by-step explanation:

(1/3)^2 = 1/3 x 1/3 =1/9

plus I checked the answer after I got it wrong so...

7 0
4 years ago
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Describe the steps that you would use to generate an expression equivalent to 8.1b+6.7a+2.5+7+.9a-2.8b
bija089 [108]

Explanation:

1. Identify the different constellations of variables. Here there are three:

  • b
  • a
  • (none)

2. Combine coefficients of each of the different variable constellations:

  (8.1 -2.8)b +(6.7 +0.9)a +(2.5 +7)

  5.3b +7.8a +9.5

3. Perform any other operations that might be required depending on the sort of equivalent wanted. For example, one could write ...

  5.3(b +(78/53)a) +9.5 . . . . . . . shows the weight of a relative to b

6 0
3 years ago
Start with x2 + 4x = 12 and complete the square, what is the equivalent equation?
IgorLugansk [536]

Answer:

(x + 2)² = 16

Step-by-step explanation:

Given

x² + 4x = 12

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(2)x + 4 = 12 + 4, that is

(x + 2)² = 16

3 0
3 years ago
Plz help ill give brainlist to you
Airida [17]
51 mL = 51L*0.001, because there are 1000mL in a Liter, so this would equal <em>0.051L</em>, and that is your answer, if you want to know about the top one, if it is 14-3.6, that would equal 11.4. If it is 1.14-3.6, it is -2.46.
(0.051L is your answer)

Hope this helps, and have a nice day:)
6 0
3 years ago
Use the graph to answer the questions in part 1-3.
Tems11 [23]

Answer:

Part 1: m = -7

Part 2: y = -7x -11

Part 3: 7x + y = -11

Step-by-step explanation:

Part 1

Select 2 points, in this case (-2, 3) and (-1, -4) and then use the slope formula

m = (y2 - y1) / (x2 - x1)

m = (-4 -3) / (-1 - -2) =

m = -7/1

m = -7

Part 2

Use the point-slope form equation to find the slope-intercept form

y - y1 = m(x - x1)

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

y = -7(x +2) +3

y = -7x -14 +3

y = -7x -11

Part 3

Move the x and y to the same side of the equation

y = -7x -11

7x + y = -11

8 0
4 years ago
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