Question

solve these question please​

Answer 1

⠀⠀⠀⠀⠀⠀ ― Answer: ― (◡ ω ◡)

The formula for calculating a z-score is is z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation. As the formula shows, the z-score is simply the raw score minus the population mean, divided by the population standard deviation.

Answer 2

Answer:

hii please mark as brainliest ❤️

Step-by-step explanation:

$\frac{4(z + 3)}{3} - \frac{3 - 2z}{5} = \frac{3}{8} \\ \frac{4z + 12}{3} - \frac{3 - 2z}{5} = \frac{3}{8} \\ \frac{20z + 60 - 9 + 6z}{15} = \frac{3}{8} \\ \frac{26z + 51}{15} = \frac{3}{8} \\ 208z + 408 = 45 \\ 208z = 45 - 408 \\ z = \frac{363}{208} \\ z = 1.7$