Alex has three times as much money as jennifer. jennifer has $12 less than shannon. together they have $91. how much money does alex have?

Alex has $47.4

Step-by-step explanation:

Let a=alex, j=jennifer, and s=shannon.

a=3j

j=s-12

j+s+a=91

Substitute s-12 for j in the first equation to get a=3(s-12). Now substitute this equation and the second into the third.

s-12+3(s-12)+s=91

Simplify to get 5s-48=91

s=27.8 Substitute this into a=3(s-12) to get a=47.4

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5