Prove that a positive integer is divisible by 3 if and only if the sum of digits is divisible by 3. be sure to prove it forward and backwards. as in prove knowing an integer is divisible by 3 and find that the sum of its digits is then divisible by 3. then, assume the sum of its digits is divisible by 3 and prove that the integer is then divisible by 3. if you cannot prove both ways, do not try and solve this problem.

correct

step-by-step explanation:

homozygous. one is homozygous, while two is heterozygous.

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.

congruent segments

step-by-step explanation: