Which is a quadratic function?

A, f(x) = 2x + x + 3
B, f(x) = 0x2 – 4x + 7
C, f(x) = 5x2 – 4x + 5
D, f(x) = 3x3 + 2x + 2

None

Step-by-step explanation:

A quadratic equation , is any equation that can be rearranged in standard form as : ax^2 + bx + c, where a and b and c are known numbers . I a =0 like all of the above examples, then the function or equation is linear.

for example : A,f(c) = 2x +x +3

= 3x +3 ===> equivalent to 0x^2 +3x +3

y=mx+b

step-by-step explanation:

m slope, b y-intercept

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.