plz help I'd be highly appreciated

Plz Help Id Be Highly Appreciated class=

Answer :

Answer:

B

Step-by-step explanation:

Formula

1/2*h(b1+b2)

Substitute 5 for h, 7 for b1 and 10 for b2

1/2*5(7+10)

Add 7 and 10 together  

1/2*5(17)

Divide 5 by 2  

2.5(17)

Multiple

42.5