A triangle's total degrees is 180. You add the two angles they give you and then subtract the sum from 180. In number 9, the answer is 61. 47+72=119, 180-119= 61.

4 0

3 years ago

Step-by-Step Solutions begin on pag phing. 2. y=x² - 4 y = -3

rusak2 [61]

<h3>The solution is (1, -3) or (-1, -3)</h3>

Solution:

Given that,

$y = x^2 - 4 ------- eqn\ 1\\\\y = -3 ---------- eqn\ 2$

We have to find the solution (x, y)

Substitute eqn 2 in eqn 1

$-3 = x^2 - 4$

$x^2 = -3 + 4\\\\x^2 = 1\\\\Take\ square\ root\ on\ both\ sides\\\\x = \pm 1$

Thus, we get,

x = 1

x = -1

Thus the solution is (1, -3) or (-1, -3)

4 0

4 years ago

Evaluate the function

vova2212 [387]

-1 you change all the x values to -1 and then solve

4 0

3 years ago