Answer:
Step-by-step explanation:
Three times the difference of a number and four.
or
Three times the quantity of four less than a number n.
x+4y=15 2x-y=-15
We have to make x neg.
-2(x) + 4y (-2)= -2(15)
-2x-8y=-30
2x-y=-15
-9y= -45
Solve for y
Y=-45/-9
Y = 5
Substitute your y answer into one original equation to find x .
x+4y=15
X+4(5)=15
X+20=15
X=15-20
X= -5
Answer is (-5,5)
Answer:a and b
Step-by-step explanation:an acute angle in small, an acute angle will always be smaller then C
