Mrs. Yuri's classroom has 21 students. She took all of her students to a field trip at the skate station and brought four chaperones. The students, chaperones and Mrs. Yurirented either regular skates for $4.25 or inline skates for $7.50 per day. Mrs. Yuri paid a total of $143.00 for skates' rental.

Question

Mathematics

Reyna Hines

28 December, 09:35

Mrs. Yuri's classroom has 21 students. She took all of her students to a field trip at the skate station and brought four chaperones. The students, chaperones and Mrs. Yurirented either regular skates for $4.25 or inline skates for $7.50 per day. Mrs. Yuri paid a total of $143.00 for skates' rental.

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Answers (2)

Know the Answer?

Emilia · Answer 1

Setup a system of equations.

r + I = 26

4.25r + 7.50i = 143.00

r = 26-i

Plug r = 26-i into 2nd equation and solve

4.25 (26-i) + 7.50i = 143.00

110.50 - 4.25i + 7.50i = 143.00

110.50 + 3.25i = 143.00

Subtract 110.50 from both sides

3.25i = 32.50

Divide both sides by 3.25

I = 10

10 pairs of inline skates

26-10 = 16

16 pairs of regular skates

Matthew · Answer 2

21+1=22

Chaperones:supervises so won't be participating

143 divided by 22 equals 6.5

Answer:6.5

Are u sure u didn't misspelled 6.5 into 7.5?