MATH QUIZ FOR MATH TEACHERS AT ACA

Three friends pay $30 for a hotel room. The manager says it should be $25 and gives the bellboy $5. The bellboy keeps $2 and returns $1 to each friend. The friends paid $9 each ($27 total), and the bellboy had $2. Where is the missing dollar?

• There is no missing dollar

• The manager took it

• The bellboy took it

• It's in the room

Find the perimeter of a semicircle with a radius of 20cm.

• 102.8cm

• 62.8cm

• 31.4cm

• 40cm

What is the median of the data set: 12, 25, 16, 9, 5, 22, 27, 20?

• 16

• 18

• 20

• 22

What whole number could you use to substitute for “a” in the list so the numbers are ordered from least to greatest? 2/a, a/22, 33%.

• 5

• 6

• 7

• 8

Solve for n. 2n - 4 > -12.

• n > -4

• n < -4

• n = -4

• n = 4

If angle a is 7x° and angle b is 11x°, what is x if a and b are complementary angles?

• x = 5°

• x = 10°

• x = 15°

• x = 20°

What is the distance (in units) between points (-3, -4) and (6, -4) on the coordinate plane?

• 7 units

• 8 units

• 9 units

• 10 units

Are the following expressions equivalent? a. 8 ⅛ + (3 2/10 - 1 ⅛ ), b. - (- 8 ⅛ ) - (-3 2/10) + (- 1 ⅛ ) c. (8 ⅛ + 3 2/10) + (-1 ⅛) (ans = yes)

• yes

• no

Which two equations are equivalent to -4/7 -8/9 + 4/7 + 9/8?

• (-4/7 - 4/7) + (8/9+9/8)

• -8/9 + 9/8

• (4/7 - 4/7) + (9/8 - 8/9)

A unicorn daycare center requires there to be 2 supervisors for every 18 baby unicorns. Write an equation that shows the relationship between 's' the number of supervisors, and 'u' the number of baby unicorns.

• s = u/9

• s = 9u

• s = u/18

• s = 18u