Answer:
see below
Step-by-step explanation:
5(4 + 8) =
Distribute
5*4 + 5*8
20 + 40
60
{5x + 4y = -30
{3x - 9y = -18 | : 3
{5x + 4y = -30
{x - 3y = -6 | + 3y
{5x + 4y = -30
{x = 3y - 6
{5(3y - 6) + 4y = -30
{x = 3y - 6
{15y - 30 + 4y = -30 | + 30
{x = 3y - 6
{19y = 0 | : 19
{x = 3y - 6
{y = 0
{x = 3 · 0 - 6
{y = 0
{x = -6
Answer:
-6
Step-by-step explanation:
3n = n² - 54
n² - 3n - 54 = 0
n² - 9n + 6n - 54 = 0
n(n - 9) + 6(n - 9) = 0
(n - 9)(n + 6) = 0
n = 9 , -6
Answer:That can’t be simplified further.
Step-by-step explanation:
There both 4 but the first one represents 40,000 the second one is 4,000
