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Mumz [18]
3 years ago
14

jayden and carson are selling t-shirts and sweatshirts for a fundraiser. jayden sells 9 t-shirts and 3 sweatshirts for $288. car

son sells 1 t-shirt and 6 sweatshirts for $270. solve the system of equations for this situation.using elimination
Mathematics
1 answer:
Genrish500 [490]3 years ago
3 0

Answer:

sweatshirts cost $42

t-shirts cost $18

Step-by-step explanation:

9x+3y=288

x+6y=270

substitute 270-6y for x in the first problem

9(270-6y) +3y=288

2430-54y+3y=288

2430-51y=288

51y=-2142

y=42

then plug y=42 into the second equation

x+6(42)=270

x+252=270

x=18

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2 years ago
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Find the dimensions of the rectangle with area 289 square inches that has minimum perimeter, and then find the minimum perimeter
nalin [4]
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To see , try starting at length 1, and gradually increase the length. 
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Or if you want to use algebra, Say the width is 17-x 
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Now, this is bigger than 17+x, as shown here: 
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