In an isosceles triangle, two of the sides are equal. This means that the angles opposite them are equal, too. If one is 40 degrees, then so is the other. To find the angle opposite the unequal side, begin by adding the equal angles.
40+40=80 degrees
To find the third angle, subtract this amount from 180 (the number of degrees in any triangle) 180 -80=100 degrees (third angle)

Letx= the number of cards printed and sold each month. Therefore, cost is equal to 6000 + 18x,and revenue is equal to 0.30x.You're looking for the point where revenue is greater than the cost (revenue > cost). The inequity is 0.30x> 6000 + 18x.Subtracting 18xfrom both sides of the inequity results in 0.12x>
6000. Divide both sides by 0.12. The result is thatx> 50,000. The printing plant would have to print and sell
50,000 cards per month to make a profit.

Objects rubbing together produce friction.

Gears with their teeth together in mesh turn in opposite directions. Gear 1 turns clockwise. Gear 2, in mesh with Gear 1, turns counterclockwise. Gear 3, in mesh with Gear 2, turns clockwise. Gear 4, in mesh with Gear 3, turns counterclockwise. Gear 5, in mesh with Gear 2, turns clockwise.