# Write the quadratic function in vertex form: f(x) = 4×2 + 2x -5

Posted On 05/29/2020

The correct answer was given: Brain

The answer would be A. 1 1/5

48/40 = 1 8/40

1 8/40 Simplify to 1 1/5

Hope this helps!

The correct answer was given: Brain

I believe it is 60-10=x because it says she purchased it with 60$ but recieved 10$ in change causing the amount we dont know to be a variable such as “x”

The correct answer was given: Brain

its 60-10+x why, because she bought the dress with $60 and she received $10 dollars back. We don’t know the variable.

Step-by-step explanation:

The correct answer was given: Brain

Answers:

k = 13The smallest zero or root is x = -10

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Work Shown:

note: you can write “x^2” to mean “x squared”

f(x) = x^2+3x-10

f(x+5) = (x+5)^2+3(x+5)-10 … replace every x with x+5

f(x+5) = (x^2+10x+25)+3(x+5)-10

f(x+5) = x^2+10x+25+3x+15-10

f(x+5) = x^2+13x+30

Compare this with x^2+kx+30 and we see that k = 13

Factor and solve the equation below

x^2+13x+30 = 0

(x+10)(x+3) = 0

x+10 = 0 or x+3 = 0

x = -10 or x = -3

The smallest zero is x = -10 as its the left-most value on a number line.