Answer:
58.29 cm²
Step-by-step explanation:
The area (A) of a trapezium is calculated as
A =
h (a + b) , substitute given values into formula
A =
× 6.7 × (7 + 10.4)
= 3.35 × 17.4
= 58.29 cm²
Y = 9
7y - 10y = -3y
bring down the 9 = -18 so
-3y + 9 = -18
9 - 9 = 0
- 18 - 9 = - 27
- 3y ÷ - 3 = y
- 27 ÷ -3 = 9
therefore y =9