A memory test consist of 35 task. Each task is graded on a scale of 1 to 10. The score of the memory test is reported as the sum of the scores of the task. The main score of the task is 4.8 with a standard deviation of 3.4. What is the probability that a random selected exam he will score 157 points or less on the memory test.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)