What is the percent increase from $80-$88

10 percent

Step-by-step explanation:

Where: 80 is the old value and 88 is the new value. In this case we have a positive change (increase) of 10 percent because the new value is greater than the old value.

10%

Step-by-step explanation:

80 is the old value and 88 is the new value. In this case, we have a positive change (increase) of 10 percent because the new value is greater than the old value.

Brain-List?

1/2*qr*rs

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)