A study revealed that, compared with children who do not have autism, most autistic children have underdeveloped motor skills. However, siblings of autistic children do not have any motor impairment.

Based on this excerpt, we can conclude that autism .

17

step-by-step explanation:

unless if u could do my questions, if not i wouldn't want to

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.

1st integer x

2nd integer x+1

3rd integer x+2

4th integer x+3

x+x+1 +x+2+x+3 =74

combine like terms

4x+6 = 74

subtract 6 from each side

4x = 68

x = 17

the integers are 17,18,19,20