Answer:
21 and 30
Step-by-step explanation:
x + y = 51
x - y = 9
add the two equations and y's will cancel out
2x = 42 divide by 2
x = 21 so put 21 in for x in the top equation and solve
21 + y = 51
y = 30
Answer:
12
Step-by-step explanation:
the angles of a triangle all add up to 180
thus, we can combine every term given and set them equal to 180 and solve for x

Answer:
I think it C because I know that Nalia isn't correct so it's not D or B.
Answer: Lila is incorrect about transferring money through checks.
Step-by-step explanation: If Lila transfers money through checks then she is adding money to her bank account funds and increasing her interests if she leaves the money there for a while.