The function f is defined by f(x)=-x2+2x-7. what is the value of f(-3)? a. -22 b. -10 c. -7 d. -4 e. 8

Option A

Step-by-step explanation:

we have

we know that

f(-3) is the value of f(x) when the value of x is equal to -3

so

For x=-3

substitute the value of x=-3 in the equation

40 x 50 = 2000

step-by-step explanation:

< xcy ≅ < xby

step-by-step explanation:

in δcax and δbax,

so, δcax ≅ δbax (side-angle-side or sas)

since δcax ≅ δbax, we can conclude < acx ≅ < abx

in δacy and δaby,

so, δacy ≅ δaby (side-angle-side or sas)

since δacy ≅ δaby, we can conclude < acy ≅ < aby

now,

< acy ≅ < aby

=> < acx + < xcy ≅ < abx + < xby

=> < acx + < xcy ≅ < acx + < xby   (since < acx ≅ < abx already proved above)

subtracting < acx from both sides, we get

< acx + < xcy -< acx ≅ < acx + < xby -< acx

cancelling out < acx and -< acx from both sides, we get

< xcy ≅ < xby (proved)