Question: 2x - 4 + 5x
Simplified: 7x - 4
Answer/Step-by-step explanation:
Area of trapezium = ½*(AD + BC)*AB
Area = 42 cm²
AD = (x + 8) cm
BC = (x + 5) cm
AB = x cm
Plug in the values into the equation
42 = ½((x + 8) + (x + 5))*x
42 = ½((x + 8 + x + 5)*x
42 = ½(2x + 13)*x
Multiply both sides by 2
42*2 = (2x + 13)*x
84 = 2x² + 13x
2x² + 13x = 84
Subtract both sides by 84
2x² + 13x - 84 = 0
Answer:
x= 9
Step-by-step explanation:
good luck
Area =bh
36in2=b(9)
——— ——
9 9
36
—— =4
9
Base= 4
Maybe you meant solve for x?
If so, the answer is 4