Quiz 1

#$&*

course Mth 163

9/18 4:30

Quiz #1Find the vertex and the zeros of y = .028 t2 + -1.6 t + 79.

xVertex = -(-1.6) / 2(.028) = 1.6/.056 = 28.57 Y = .028 (28.57)^2 – 1.6 (28.57) + 79 = .028 (816.24) – 45.71 + 79 = 22.85 – 45.71 + 79 = 56.14 Vertex = (28.57, 56.14) Zeros = .028t^2 – 1.6t + 79 = 0 = -(-1.6) +- sqrt(-1.6^2 – 4 (.028)(79)) / 2(.028) = 1.6 +- sqrt(2.56-8.848) / .056 = 1.6 +- sqrt(-6.288) / .056 No such solution. There is no square root of a negative number "

Self-critique (if necessary): ------------------------------------------------ Self-critique rating: ________________________________________ `gr91 #$&*

Quiz 1

#$&*

course Mth 163

9/18 4:30

Quiz #1Find the vertex and the zeros of y = .028 t2 + -1.6 t + 79.

xVertex = -(-1.6) / 2(.028)

= 1.6/.056

= 28.57

Y = .028 (28.57)^2 - 1.6 (28.57) + 79

= .028 (816.24) - 45.71 + 79

= 22.85 - 45.71 + 79

= 56.14

Vertex = (28.57, 56.14)

Zeros =

.028t^2 - 1.6t + 79 = 0

= -(-1.6) +- sqrt(-1.6^2 - 4 (.028)(79)) / 2(.028)

= 1.6 +- sqrt(2.56-8.848) / .056

= 1.6 +- sqrt(-6.288) / .056

No such solution. There is no square root of a negative number

&#Very good responses. Let me know if you have questions. &#