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svp [43]
3 years ago
10

Solve the equation, justify each step with an algebraic property. -4+-17+x.

Mathematics
1 answer:
Inessa [10]3 years ago
5 0

–21 + x

Explanation:

Step 1: Given expression: –4 + (–17) + x

Step 2: In the algebraic property, positive × negative = negative

So, –4 + (–17) + x = –4 – 17 + x

Step 3: Add two negative numbers, the result will be sum with minus sign

–4 – 17 + x = –21 + x

Hence,  –21 + x is the required equation.

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Answer:

15.2\ units

Step-by-step explanation:

step 1

Plot the vertices of the polygon to better understand the problem

we have

A(-2, 1). B(-3, 3), C(-1, 5), D(2, 4),E(2, 1)

using a graphing tool

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see the attached figure

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step 5

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step 6

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Round to the nearest tenth of a unit

P=15.2\ units

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