Answer:
has 3 significant figures
Step-by-step explanation:
because zeros are counted if they are between the numbers
X+y+5=0
y=-x-5
If a solution exists y=y so we can say
x^2-9x+10=-x-5 add x+5 to both sides
x^2-8x+15=0 now factor
x^2-3x-5x+15=0
x(x-3)-5(x-3)
(x-5)(x-3) so x=3 and 5, using y=-x-5
y(3)=-8 and y(5)=-10
So the two solutions are:
(3,-8) and (5,-10)
Answer:
Step-by-step explanation:
let the original price=x
85 % of x=51

Answer:
3x + 20 = 8x + 60
-5x + 20 = 60
-5x = 40
x = -8
Step-by-step explanation: