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Question 7

Answer : 1200 inches squared

Question: 8

84 centimeters squared

Question: 9

2304 feet squared

Step-by-step explanation:

1) Q7: Parallelogram

A=BH

base 30 inch X height 40 inch = 1200 inches squared

2) Q8: Rhombus

A=pq /2

Multiply the two diagonals then divide by 2

Diagonals 14 cent X Diagonal 12 cent divided by 2 = 84 centimeters squared

3) Q9: Trapezoid

A= (B1+B2)H/2

Add the two bases  times the height divide by 2

gives you:

2304 feet squared

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.