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dexar [7]
4 years ago
15

Solve each system of equations by substitution. List the ordered pair.

Mathematics
1 answer:
Anit [1.1K]4 years ago
8 0
Y=6x-11
-2x-3y=-7
-2x-3(6x-11)=-7
-2x-18x+66=-7
-20x=-73
x=3.65
y=6(3.65)-11=10.9

y=-3x+5
5x-4y=-3
5x-4(-3x+5)=-3
5x+12x=17
x=1
y=-3(1)+5=2

2x-3y=-1
y=x-1
2x-3(x-1)=-1
-x=-4
x=4
y=4-1=3

-3x-3y=3
y=-5x-17
-3x-3(-5x-17)=3
12x=-48
x=-4
y=-5(-4)-17=3
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Yes.

Step-by-step explanation:

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frez [133]

7x - 44 = 4x + 4

Add both sides 44

7x - 44 + 44 = 4x + 4 + 44

7x = 4x + 48

Subtract both sides 4x

7x - 4x = 4x - 4x + 48

3x = 48

Divide both sides by 3

3x ÷ 3 = 48 ÷ 3

<h2>x = 16 </h2>

______________________________

Suppose that the angle between 39 and 4x + 4 is t degrees as you know they make a straight line together thus :

39 + t + 4x + 4 = 180

39 + t + 4(16) + 4 = 180

39 + t + 64 + 4 = 180

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t + 107 = 180

Subtract both sides 107

t + 107 - 107 = 180 - 107

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_____________________________

8y - 43 = 4x + 4 + t

8y - 43 = 4(16) + 4 + 73

8y - 43 = 64 + 4 + 73

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Divide both sides by 8

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3 years ago
Ali used the expressed 8+25×2-45 to find how many CDs he has. how many CDs dose he have
MatroZZZ [7]

Ali has 13 CD's

Here's how I got my answer:

Step 1: Simplify 25 * 2 to 50. Which leaves us with 8 + 50 - 45

Step 2: Simplify 50 - 45 to 5. Which leaves us with 8 + 5.

Step 3: Simplify 8 + 5, to get your answer, 13.

7 0
3 years ago
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Marat540 [252]

Answer:

The "a" value is 2x^2

Step-by-step explanation:

This is because it is the first part of the equation. The parts of the equation are given the values a, b, and c based on their position in the equation.

If this answer is correct, please make me Brainliest!

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4 years ago
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