Answer:
19.8x - 11.1y
Step-by-step explanation:
<u>Given information</u>:
- Gain 25x yards
- Gain 0.9y yards
- Lose 12y yards
- Lose 5.2x yards
"Gain" means to add the value.
"Lose" means to subtract the value.
Therefore, <u>net yardage</u> is:
⇒ 25x + 0.9y - 12y - 5.2x
<u>Collect</u> like terms:
⇒ 25x - 5.2x + 0.9y - 12y
<u>Factor</u> out the common variables x and y:
⇒ x(25 - 5.2) + y(0.9 - 12)
Carry out the operations in the <u>parentheses</u>:
⇒ x(19.8) + y(-11.1)
Therefore, the net yardage is 19.8x - 11.1y