Please help me with number 4.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Measure of angles 31 (x+4) (3x+9) me

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score