Answer:
one solution, i.e x = 1 and y = -2
Step-by-step explanation:
Given two equations :
x+3y = -5 -------(1)
4x - y =6 ---------(2)
Using elimination method,
Multiply equation (2) by 3 and add it to equation (1)
We get,
x + 3y + {(4x - y)×3} = -5 +(6×3)
x + 12x + 3y - 3y = -5 + 18
13x = 13
x = 13/13 = 1
And corresponding y will be:
x + 3y = -5 , Plug x =1 to get y
1 + 3y = -5
3y = -5 - 1
y = -6/3 = -2
Hence we got only one solution, i.e x =1 and y = -2
Answer:
False
Step-by-step explanation:
Answer:
h = 7.7 cm
Step-by-step explanation:
you can create a proportion using Law of Sines
<u> sin 90 </u> = <u> sin 31 </u>
15 h
<u> 1 </u> = <u> 0.515 </u>
15 h
h ≈ 7.7
Answer:
1, 3
.4, 0
3, 12
Step-by-step explanation:
Answer:
x = 42,33°
Step-by-step explanation:
3x + 1° + 52° = 180° [<em>angles</em><em> </em><em>on</em><em> </em><em>a</em><em> </em><em>straight</em><em> </em><em>line</em><em>]</em>
3x + 53° = 180°
3x = 180° - 53°
3x = 127°
<em><u>divide</u></em><em><u> </u></em><em><u>b</u></em><em><u>o</u></em><em><u>t</u></em><em><u>h</u></em><em><u> </u></em><em><u>sides</u></em><em><u> </u></em><em><u>by</u></em><em><u> </u></em><em><u>3</u></em>
x = 42,33°
