Jenny recorded the effects of eating spinach on her health. which of these is a control variable ?
a. both eating spinach and jenny health
b. jenny health
c. eating spinach
d. neither eating spinach or jenny health

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation:

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or