A pizzeria makes 7 pepperoni pizzas for every 3 cheese pizzas. Yesterday they made 42 pepperoni pizzas. How many cheese pizzas were made?

18 cheese pizza's

Step-by-step explanation:

3-7

6*7=42 pepperoni pizza's

3*6=18 cheese pizzas

18

Step-by-step explanation:

7:3

14:6

21:9

28:12

35:15

42:18

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.