Ch. 2 - Algebra Flashcards
1
Q
Absolute value questions often have two answers…
A
Write out and solves both equatins created by the absolute value.
2
Q
Whenever you multiply or divide both sides of an inequality by a negative…
A
Flip the inequality sign.
3
Q
When combing ranges, remember to…
A
Write out all four possibilites.
The smallest and biggest result become the new endpoints.
4
Q
Two formulas associated with direct variation?
A
y1/x1 = y2/x2
y = kx
5
Q
Two formulas associated with indirect variation?
A
x1y1 = x2y2
y = k/x
6
Q
Distance = ?
A
Rate x Time
7
Q
Work done = ?
A
Rate of work x Time
8
Q
x2 + 2xy + y2 = ?
A
(x + y)2
9
Q
x2 – 2xy + y2 = ?
A
(x – y)2
10
Q
x2 – y2 =?
A
(x + y)(x – y)
11
Q
ax2 + bx + c = 0
x = ?
A
x = (-b ± √(b2 – 4ac))/2a
