Suppose the offense of your football team gains five yards on first down and then loses eight yards on second down.
Find the number of yards your team has moved the ball on
two plays. Explain your answer?

The ball has been moved 13 yards, however it has gone -3 yards from the starting point.

Step-by-step explanation:

The ball is moved 5 yards and then 8 yards. That is 13 yards total. The ball was moved forward 5 yards and backwards 8 yards. 5-8= -3. The ball is -3 yards from its original position.

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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)