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3 years ago

I don't know how to do this?

Mathematics

2 answers:

Alborosie3 years ago

8 0

All you gotta do is set each of the parentheses equal to zero and solve for x
Ex x+7=0 => x= -7
x+4=0 => x= -4

miskamm [114]3 years ago

7 0

Do you know foil? FOIL= First,Outside,Inside, and Last

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Y = 4x – 18 y = -5x +9

adelina 88 [10]

Answer:

(3, -6)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

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

Algebra I

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

Step-by-step explanation:

Step 1: Define Systems

y = 4x - 18

y = -5x + 9

Step 2: Solve for x

Substitution

Substitute in y [2nd Equation]: 4x - 18 = -5x + 9
[Addition Property of Equality] Add 5x on both sides: 9x - 18 = 9
[Addition Property of Equality] Add 18 on both sides: 9x = 27
[Division Property of Equality] Divide 9 on both sides: x = 3

Step 3: Solve for y

Substitute in x [1st Equation]: y = 4(3) - 18
Multiply: y = 12 - 18
Subtract: y = -6

5 0

2 years ago

Read 2 more answers

What is the slope of the points (-2,7) and (2,-5)? 4 -3 -12 3

Dafna1 [17]

Answer:

-3

Step-by-step explanation:

Slope is equal to (-5-7)/(2-(-2)=-12/4=-3

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2 years ago