The figure to the right shows an addition pyramid in which each number is the...

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The figure to the right shows an addition pyramid in which each number is the sum of the two numbers immediately below For each of the incomplete addition pyramids show that the values in each square can be determined by forming and solving an equation in the unknown variable shown Complete parts a through c below Use this equation to complete the addition pyramid below 2 13 y 3 2 Type an expression using z as the variable 13 3 c In terms of z what is the value of the middle entry in the bottom row of the addition pyramid to the right Use the third row to find in terms of z the value of the second entry in the second row Simplify your answer Type an expression using z as the variable Which of the following is a valid equation for the addition pyramid Choose the correct equation below OA 19 7 19 z 6 OB z z 1 19 C z 6 z 19 CELO 6 Z 19 3 7 8 17 5 6 6 9 4

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