B² - 4ac
= 8² - 4*(-2)*(-9)
= 64 - 72
= -8
7 times 30 is 210
answer: 30
Answer: Early in the race, Alberto runs faster. He maintains a speed of 20 km/h, as Bianca running speed ??increases??. The first person to cross the finish line is Bianca.
Step-by-step explanation:
Answer:9
Step-by-step explanation:
-2x+8=-10
-2x=-18
X=9