My dumb self forgot to put a picture on the last one but please help me with these 4 questions in the picture, my friend and I have about 3 of the answers but need help checking our work. I’ll give you brainliest and I made it 100 points.

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

What is the value of x? enter your answer in the box.