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2 years ago

PLEASE EXPLAIN WHAT IT MEANS TO "ADD THEM TOGETHER" I have seen people do this in other explanations but i don't get it..

Mathematics

1 answer:

Kaylis [27]2 years ago

8 0

Answer:

quadrant I

Step-by-step explanation:

x + y - 4 = 0 becomes x + y = 4, so we have the equations x + y = 4 and x - y = 0. Add these two equations to eliminate y, obtaining 2x = 4. From this, x = 2, and so y = 2. So the solution is in quadrant I.

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Find the distance between the points A(2,-1) and B(-4, 2). (simplify your answer)

Pani-rosa [81]

Answer:

$d = 3\sqrt{5}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra II

Distance Formula: $d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Step-by-step explanation:

Step 1: Define

Point A (2, -1)

Point B (-4, 2)

Step 2: Find distance d

Simply plug in the 2 coordinates into the distance formula to find distance d.

Substitute [DF]: $d = \sqrt{(-4-2)^2+(2+1)^2}$
Subtract/Add: $d = \sqrt{(-6)^2+(3)^2}$
Exponents: $d = \sqrt{36+9}$
Add: $d = \sqrt{45}$
Simplify: $d = 3\sqrt{5}$

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