Kathleen says that quadrilaterals have right angles Gray says that quadrilaterals do not have to have right angles explain who is correct

Step-by-step explanation:

Some quadrilaterals do have right angles persay squares rhombus

but when a rhombus is streached creating acute or obtuse angels it still remains a quadrilateral.

all a quadrilateral means is that the shape has 4 sides 4 vertex

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

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answer: d.) the total number of protons and neutrons is 15

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