Answer:
x = 9
Step-by-step explanation:
4 1/4 - 3 3/4 = 1/2
Sarah picked 1/2 pound more than Nathan
There are four cards labelled '2' and there are four cards labelled '6'. Therefore, number of cards 2's or 6's = 4 + 4 = 8
Answer:
x² + 4x - 21
Step-by-step explanation:
Given the solutions of x = 3 and x = -7, moving the constant to the other side and setting both equations equal to '0':
x - 3 = 0 and x + 7 = 0
So, the two binomials that make up the quadratic are:
(x - 3)(x + 7)
Use FOIL: x² + 7x - 3x - 21
Combine like terms: x² + 4x - 21