Answer:
5/4
Step-by-step explanation:
9t²-16u² = 3²t²-4²u² = (3t)²-(4u)² = (3t+4u)(3t-4u)
-15x + 30
-3(5x -10)
I=prt
I= 400×(4.5/100)×5
I=$90
total 400+90=$490
I=250×(2/100)×5
I=$25
total 250+25=$275