Question

3. Find average of first ten multiples of 7.​

Answer 1

Answer:

38.5

$\begin{aligned}</p><p>= \frac {7(1+2+3+...+10)}{10}</p><p>\end{aligned}$

$\begin{aligned}</p><p>= \frac {7(10(10+1))}{10 \times 2}</p><p>\end{aligned}$

$\begin{aligned}</p><p>= \frac {7(110)}{10 \times 2} = 38.5</p><p>\end{aligned}$

Answer 2

1. answer is discussed there

value is 15

please mark me as brainiest