Question

Someone help pleaseeeee

Answer 1

`1. \: \: \: a = (5)/(7) \\ 2. \: \: \: 4 \\ 3. \: \: \: 15 {x}^(2) + 60x + 135 \\ 4. \: \: \: m = {75}^(o) \\`

Explanation:

`1. \: \: 7a - 8 = 13 \\ 7a - 8 + 8 = 13 + 8 \\ 7a = 5 \\ (7a)/(7) = (5)/(7) \\ a = (5)/(7) \\`

`2. \: \: \: 4 = 2 * 2 \\ 8 = 2 * 2 * 2 \\ 4 \\`

`3. \: \: \: 15 {(x + 3)}^(2) \\ 15(x + 3)(x + 3) \\15 (x + 3)(x + 3) \\ 15 |x(x + 3) + 3(x + 3)| \\ 15 ({x}^(2) + 3x + 3x + 9 )\\ 15( {x}^(2) + 6x + 9) \\ {15x}^(2) + 60x + 135 \\`

`4. \: \: \: m = {75}^(o) (opposite \: angles)`