Marcos and Adelyn are comparing the amount of lunch money they spent this week. They spent $45 together on lunches. Marcos spent d on lunches, and Adelyn spent $6 less than Marcos. How much money did Marcos spend on lunches this week? A. $31.50 B. $25.50 C. $22.50 D. $19.50

B. $25.50

Step-by-step explanation:

On this question you have to subtract 6 dollars from one of the answers and add that same amount back on because that would equal the total amount of lunch money. A wouldn't work because 31.50-6+31.50 is over 45 dollars. When you have 25.50-6+25.50 you get 45!

B. $25.50

Step-by-step explanation:

d = how much money Marcos spent

k = how much money Adelyn spent

d + k = 45

k = d - 6

rearrange the first equation to . . .

k = 45 - d

. . . and plug it into the other equation.

45 - d = d - 6

45 + 6 = d + d

51 = 2d

d = 25.50

hope this helps !

which expression can be used to convert 80 us dollars (usd) to australian dollars (aud)?

1 usd = 1.0343 aud

1 aud = 0.9668 usd

step-by-step explanation:

sorry just need the points

75

step-by-step explanation: