3 years ago

Help please!! This is timed!

Mathematics

2 answers:

MAVERICK [17]3 years ago

7 0

B jdjdjdjdjdhdhbddndnbdjd

Anika [276]3 years ago

4 0

Answer:

b. s = -21t + 84

Step-by-step explanation:

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4 years ago

How do you find the x intercept and coordinates of the vertexfor the parabola y=x^2-14x+49????

lbvjy [14]

$y=x^2-14x+49=\underbrace{x^2-2x\cdot7+7^2}_{use\ (a-b)^2=a^2-2ab+b^2}=(x-7)^2\\\\Vertex\ form\ of\ a\ quadratic\ function:\\\\y=a(x-h)^2+k\ where\ coordinates\ of\ the\ vertex\ (h;\ k)\\\\\boxed{vertex:(7;\ 0)}\\\\x-intercept\ (y=0):\\\\(x-7)^2=0\iff x-7=0\Rightarrow \boxed{x=7}\\\\\\Answer:\\\\x-intercept:(7;\ 0)\\\\the\ coordinates\ of\ the\ vertex:(7;\ 0)$