How many three-digit numbers can you make if you are not allowed to use any other digits except 4 and 9?

  8

Step-by-step explanation:

That total is ...

  (number of possibilities in each location)^(number of locations) = 2^3 = 8

The possible numbers are ...

  444, 449, 494, 499

  944, 949, 994, 999

There are 8 of them.

answer with step-by-step explanation:

a. ∠j is supplementary to ∠k - true:

(opposite angles of a trapezoid are supplementary which means that they add up to 180 degrees)

b. kl is parallel to jm - true:

(opposite sides are parallel to each other in a trapezoid)

c. jk is perpendicular to kl - false:

(clearly, jk does not make a right angle with kl)

d. jk is parallel to lm - false:

(jk and lm are two lines opposite in direction to each other so they cannot be parallel)

e. ∠j is congruent to ∠m - true:

(the angles on each side of the base are congruent)

f. ∠j is congruent to ∠k - false:

(the angles on the same side but opposite side of the base are not congruent)