Step-by-step explanation:
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The property shown is a B: substitution property, this is when you you the know that X=Y so X can be substituted in any equation with Y and Y can be substituted in any equation with X. hope this helps
For the first question, it would be D:

÷ 9. This is because to solve a division problem with fractions, you would need to multiply the first fraction by the reciprocal of the second fraction. For the second question, the answer would be D: 32. This can be solved by dividing 8 by

or 0.25. For the third question, it would be D.

. This can be solved by dividing

by 3. For the fourth question, the answer would be

. This can be found by flipping the 4, which would make it look like

, and multiplying it by

. For the last question, 1 would be B, 2 would be C, 3 would be C, and 4 would be A.
Hope this helps ^-^
Answer:
270cm squared
area of shaded part rectangle is 180
are of triangle is 48 and 42 respectively you add the three to get 270