I would reccomend the app photo math its really easy to use and it answers questions like this.
Answer:
24.6
Step-by-step explanation:
you multiply them all by two then add them together. :P
Answer:
b=16
Step-by-step explanation:
Formula~ 1/2*b*h
1/2*15*b=120
7.5b=120
b=120/7.5
b=16
(you can substitute the value to check-i've done it below)
1/2*16*15=?
if you work it out, the ans will be 120, therefore the ans is correct!
45/100 × 115 = 51.75...........