A)
What are the two features that make this shape a square?

equilateral, 4 right angles

Step-by-step explanation:

Answer-

for a shape to be a square, you need to make sure that all size are equal. then you will need to see if the angels are all the same (they need to be 90 degrees). all the sides must be parallel with each other. that is what makes a shape a square. this doesn't fit will all quadrilateral shapes.

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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a precentage of 6th graders. the population is all 6th graders. let me know if i'm wrong, i hope this ! : )

step-by-step explanation: