Goal A contractor bought 7.6 ft2 of sheet metal. He has used 3.5 ft2 so far and has $123 worth of sheet
metal remaining. The equation 7.6x - 3.5x = 123 represents how much sheet metal is remaining and
the cost of the remaining amount. How much does sheet metal cost per square foot?
Sheet metal costs $
per square foot
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Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

Pls brainliest will be awarded if answer is correct

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)