PLEASE HELP ME 12 POINTS

Streamers cost 2.50 and balloons cost 1.25.

Step-by-step explanation:

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Balloon : $1.25

Streamer : $ 2.50

Step-by-step explanation:

Form simultaneous equations.

Let streamer be represented by s

Let balloons be represented by b

So the equations will be;

3s + 2b = 10 i

2s + 1b = 6.25ii

Make the terms with s equal by multiplication

[3s + 2b = 10 ]2

[2s + 1b = 6.25]3

Perform subtraction

6s + 4b = 20

6s + 3b = 18.75

b = 1.25 iii

Use  iii  in ii  as;

2s + 1b = 6.25

2s + 1.25 = 6.25

2s = 6.25 - 1.25

2s = 5.00

s= 5.00 / 2

s= 2.5

Hence ; a balloon is  $1.25   and a streamer is $2.5

x=9

step-by-step explanation:

square root

step-by-step explanation: