Please help i need help
2 answers:
You might be interested in
Answer:
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
- Left to Right
<u>Algebra I</u>
Coordinate Planes
- Coordinates (x, y)
<u>Pre-Calculus</u>
Vectors
- Component Form:
Step-by-step explanation:
<u>Step 1: Define</u>
<em>Identify.</em>
Point Y(-9, 2)
Point Z(3, -4)
<u>Step 2: Find</u>
- Substitute in points [Vector Component Form]:
- [Order of Operations] Evaluate:
we know that in direct variation as x increase y also increases.
in indirect variation x decreases y increase and vice versa.
in part a we have x at top (numerator ) and y at denominator it mean indirect variation (as x increases y decreases).
to find k we know that for indirect variation xy=k
if we rewrite the equation x=9/y we get xy=9
which mean k=9 .
in part b we have 4xy=20 if we simplify this equation we get
so here if we rewrite in terms of x.
we get x=5/y which represents indirect variation.
and we know xy=k
we have xy=5 .so k=5