Answer:
x² - 10x + 21
Step-by-step explanation:
yw
Answer:
A
Step-by-step explanation:
all the other answers just dont make enough sense to be true, so that is why A is correct
also, just go through each answer and see if it makes any sense
19.6/0.245=80 and 80*0.245= 19.5 as a check, so it's 80