The first is -4,-3 and the second is 1
Answer:
X=-3, y=-4, z=-5
Step-by-step explanation:
X-4y+3z=-2......(1)
2x-y+4z=-22....(2)
3x-3y+4z=-17.....(3)
-2(1)+(2) and -3(1)+(3) we get:
7y-2z=-18....(4)
9y-5z=-11.....(5)
Now 5(4)-2(5) we get:
17y=-68 so
y=-4
Put y=-4 in (4) we have:
-28-2z=-18, then 2z=-10, so we have:
z=-5
Now put y=-4 and z=-5 in (1) we get:
x+16-15=-2, then
X=-3
You can substitute it for 5.
2/5 = 0.4 = 40%
5/10 = 0.5 =50%
Answer:
B. (-5,-4)
Step-by-step explanation:
The answer must be at the point where the two functions intersect. They meet at the points (-5,-4) and (2,0). Since (2,0) is not an answer choice, (-5,-4) must be the answer.
y = - 7x - 20
the equation of a line in ' slope- intercept form ' is
y = mx + c → (m is the slope and c the y- intercept)
here m = - 7 ⇒ y = - 7x + c
to find c substitute ( - 4 , 8 ) into the equation
8 = 28 + c ⇒ c = 8 - 28 = - 20
y = - 7x - 20 → equation in slope- intercept form