Does anyone know what the ZB and PH stand for in this equation?

What is the area of the square?* Perimeter = 60m

553/12 into a mixed number

If f (x) = 2 х2 - 10, find f (5). О1) 90 O2) 10 О3) 7.5 O4) 40

Per day you have to drink 2250 ml. Your bottle of water is 550 ml. How much more water you need to put to you bottle of water to drink total 2250 ml?

3x^2-11x-4 divided by x-4

1+1-2+5-3+6-6+2x2=10 is this right or wrong

Jason wrote the mixed number 1 1/3 as the sum of three fractions. None of the fractions had a denominator of 3. How is this possible? What fractions might jason have used?

Aaron needs to hire a waiter. Waiter A is offering his services for an initial $25 in addition to $4.75 per hour. Waitress B is offering her services for an initial $30 in addition to $3.75 per hour.

A latter is placed 30 inches from the wall. It touches the wall at a height of 50 inches from the ground. The angle made by the ladder with the ground is degrees, and the length of the ladder is inches.

Which is the most accurate measurement of 1 mile?