Adam had 91 dollars. if he spent 21 dollars on new books, what is the ratio of money he still has to money he’s spent?

the answer is 10: 3 but i need a simple explanation on how! !

!

Step-by-step explanation:

ratio of money he has to money he's

used

70 : 21

so 70:21 is same as 70/21 = 10/3

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)

no pictures of the graph