T) -7x+10y=20. M) -3x+y=-2 - ,
2(8x-5y)=35(2) -1(x+y)=-6(-)
-7x+10y=20. -3x+y=-2
16x-10y=70. -x-y=6
9x=90. -4x=4
[x=10] [x= -1]
-7(10)+10y=20. -3(-1)+y=-2
-70+10y=20. 3+y=-2
10y=90. [y= -5]
[y=9]
Answer: Janelle is 1/2 below sea level, the altimeter should read -1/2 feet
Step-by-step explanation:
Explanation:
Sum of all angles= 180 degrees
So,
3x + 75= 180
3x= 180 - 75
3x= 105
x= 105/3
x= 35
Answer= 35 degrees