Answer:
equation 2into minus 3 into equation 1
8x+ 3y= -28
-3x-3y=18
----------------
5x=10
x =2
put value of y in equation 2
8 into 2+3y=-28
16+3y= -28
3y= -28+16
3y= -12
y= -4
Y intercept at -4 and it will be increasing from left to right because it has a positive slope.
r-12substitute in r=7so 7-12 = -5
8n² - 5
Step-by-step explanation:
n = 'a number'
Delta Ft = 70*3 - 42*7 = 168 #$
