Answer:
(-1,-5)
Step-by-step explanation:
So we have the system:
y=3x-2
x-y=4.
We are asked to use substitution. Luckily, it is already setup for this because one of the equations has one of the variables solved for, namely the y=3x-2 equation. We are going to insert y=3x-2 into x-y=4 and solve for x.
x-y=4 (with y=(3x-2) ):
x-(3x-2)=4
Distribute:
x-3x+2=4
Combine like terms:
-2x+2=4
Subtract 2 on both sides:
-2x =2
Divide both sides by -2:
x =-1
Now if y=3x-2 and x=-1, then y=3(-1)-2=-3-2=-5.
So the solution is (-1,-5).
Answer:
interior angle of a heptagon = 900 degrees
900 = 4x + (3x + 60)
840 = 7x
840/7 = 120
X = 120
120 X 4 = 480
120 X 3 = 360
480 + 360 + 60 = 900
4 angles = 120 degrees each
3 angles = 140 degrees each
Answer:
Woah uhh ok....
Step-by-step explanation:
15) U have to find the rate of change. Since the equation is f(x)= 3x+4, and the y-int. is 4, find where there a point of (0,4) on the table. In this case they all do so now u gotta find the rate of change. For each table, see which one has a constant rate of 3. Therefore it would be D.
16) I believe its C
17) I believe its B
18) C or D
Hmm...this is difficult. The first thing I can think of is the relationship between age and time.
