Math question 4! Thanks if you help

pythagoras theorem

height ladder can reach on the wall = side a or b

13 feet =  hyp

5 feet = side a or b (you choose which one it is)(but the equation still works                     the same)

13^2-5^2 = 144

√144 = 12

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.