Mathematics, 17.02.2021 04:10 nikki225

Solve the system of linear equations using Substitution
5x + 2y= 9
y = -x-3

Answers: 3

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Answers

Answer from: luis759

(5, -8)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Distributive Property

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of Equality

Algebra I

Terms/CoefficientsCoordinates (x, y)Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

5x + 2y = 9

y = -x - 3

Step 2: Solve for x

Substitution

Substitute in y: 5x + 2(-x - 3) = 9[Distributive Property] Distribute 2: 5x - 2x - 6 = 9Combine like terms: 3x - 6 = 9[Addition Property of Equality] Add 6 on both sides: 3x = 15[Division Property of Equality] Divide 3 on both sides: x = 5

Step 3: Solve for y

Define original equation: y = -x - 3Substitute in x: y = -5 - 3Subtract: y = -8

Answer from: Quest

You need to show the box plots

Answer from: Quest

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168

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Solve the system of linear equations using Substitution
5x + 2y= 9
y = -x-3...

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