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Mathematics

2 answers:

ICE Princess25 [194]2 years ago

8 0

139b + 1.29b = 50.73
2.49m + 2.69m = 51.63

horrorfan [7]2 years ago

4 0

Answer:

1.39b + 2.49m = 50.73

1.29b + 2.69m = 51.63

Step-by-step explanation:

Systems of linear equations are used when we have 2 equations that both contain 2 unknown variables. Since we are trying to find the price of bread and milk, we can let b = num of bread and m = num of milk.

Betty spends $50.73 buying b loaves of bread and m gallons of milk, so the first equation would be 1.39b + 2.49m = 50.73. Betty spends $51.63 buying b loaves of bread and m gallons of milk at Store B, so the second equation is 1.29b + 2.69m = 51.63.

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A student is training for the swim team during July and August one summer. She swims one hour every day, while averaging 800 met

Alex787 [66]

Step-by-step explanation:

Please find the attachment.

Let x be the number of hours the student swims per day.

We have been that a student swims one hour every day, so in 2 months the student will swim 60 hours.

We are also told that the student swims 800 meters each day. This means that slope of the graph that represents the total meters swam during the time of her training program will be 800.

So in 60 days the student will swim $60\times 800=48,000\text{ meters}$ .