The diffrence between 9 and half of a number is 16 what is the number?

is this how the question is really wrote out. it doesn't look like english

Step-by-step explanation:

half of 9 is 4.5

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.

the thermometer is precise but not accurate

step-by-step explanation: