Donald has xxx twenty-dollar bills and 111 ten-dollar bill.
how much money does donald have?

all we know is he has $1,110 in tens because you dont give me how many twenty dollar bills

Step-by-step explanation:

111*10=1110

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

y = x + 95

y = 42 + 95

y=137 mm hg