Question

GIVING 100 POINTS FOR THESE 3 PROBLEMS

Answer 1

Answer:

Step-by-step explanation:

$A=\frac{a+b}{2}*h=\frac{4+7}{2}*3=16.5cm^2$

$A=\frac{ab}{2} =\frac{4*6}{2} =12in^2$

$A=wl=6*5=30in^2$

$12+30=42in^2$

$A=\frac{a+b}{2}h=\frac{28+40}{2}*30=1020ft^2$

Wall = A=$\frac{ab}{2} =\frac{6*30}{2}=90ft^2$

Answer 2

Answer:

1. 16.5cm²
2. 42in²
3. 90ft²

Step-by-step explanation:

Question 1:

A = (a+b/2)h

A = (4+7/2)3

A = (11/2)3

A = (5.5)3

A = 16.5cm²

Question 2:

A = bh/2 = 6*4/2 = 24/2 = 12

A = bh = 6*5 = 30

A = 12 + 30 = 42

A = 42in²

Question 3:

A = (a+b/2)h

A = (28+40/2)30

A = (68/2)30

A = (34)30

A = 1020ft²

A = bh/2

A = 30*6/2

A = 180/2

A = 90ft²

Best of Luck!