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NikAS [45]
4 years ago
9

What is 3x - y = -4 2x - y = -10 Using substitution

Mathematics
2 answers:
kipiarov [429]4 years ago
5 0
3x - y = -4
3x - (-10) = -4 Substitute
3x + 10 = -4 Simplify
3x = -14 Separate numbers and variables
x = -14/3 Divide

2x - y = - 10
2x - (-10) = -10 Substitute
2x + 10 = -10 Simplify
2x = -20 Separate numbers and variables
x = -10 Divide
____ [38]4 years ago
4 0
3x-y=-4
-y=-3x-4
y=3x-4
2
2x-y=10
2x-(3x-4)=10
2x-3x+4=10
x=6
2x-y=-10
2(6)-y=-10
12-y=-10
-y=-22
y=22
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Step-by-step explanation:

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3 years ago
A student in the Construction Trades program at the Cecil County School of Technology has 4 1/2gallons of paint. If he uses 2.75
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Answer:

1.75 gallons of paint

Step-by-step explanation:

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If the student uses 2.75 gallons in one room then the gallons of paint that are left can be calculated as follows

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3 0
3 years ago
What is the factored form of x2 - 10x + 24
umka2103 [35]

Answer:

(x-6) (x-4)

Step-by-step explanation:

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4 0
3 years ago
Find a polynomial, which, when added to the polynomial 5x2–3x–9, is equivalent to: x2−5x+6
Bess [88]

The required polynomial is:-4x^2-2x+15

Step-by-step explanation:

Let P be the polynomial that has to be found

Given

One polynomial = 5x^2-3x-9

Sum of both polynomials = x^2-5x+6

So,

(5x^2-3x-9) + P = x^2-5x+6\\P = x^2-5x+6 - (5x^2-3x-9)\\P = x^2-5x+6-5x^2+3x+9\\P = x^2-5x^2-5x+3x+6+9\\P = -4x^2-2x+15

Hence,

The required polynomial is:-4x^2-2x+15

Keywords: Polynomials, expressions

Learn more about polynomials at:

  • brainly.com/question/1704778
  • brainly.com/question/1695461

#LearnwithBrainly

3 0
3 years ago
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