Please help!!! i really need some help on this :( I'll make you Brainliest!!!

1 answer:

5 0

78+92=170
170/2=85

his current average is 85% so id go with C knowing that if his next quiz he got at least a 70, his average would be 80%

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$y=x^2 +64x + 12\\ \\a=1,\ b=64 \ c = 12 \\ \\h = \frac{-64}{2}=-32 \\ \\ k = 12 -\frac{64^2}{4 }=12-\frac{4096}{4}=12-1024= -1012\\ \\y = (x+32)^2-1012 \\ \\ This \ means \ the \ vertex \ of \ the \ parabola \ is \ at \ the \ point \ (-32, -1012)\\ \\ and \ the \ parabola \ is \ concave \ up.$

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