Answer:
line 1
Step-by-step explanation:
because
3x + 2y + z = 11 ➡ z = 11 - 3x - 2y
3x and 2y must change sign when transfer to other sid eof equation
4200/70
take out a zero on both top and bottom
420/7
Simplify
= 60
Hope this helps!
Brainliest and a like is much appreciated
Answer:
x = 8.64
x = - 7.64
Both to 2 d.p
Step-by-step explanation:
Firstly, - 8 both side - cancels the +8 & get the surd to equal x - 8
Then, square root both side, to get:
x-2= x^2 - 64
+ 2 both side
x = x^2 - 66
-x
0= x^2 - 66 - x
x^2 - x - 66 = 0
general equation for quadratic is ax^2 + bx + c
Now, we can find the value of a, b, c using x^2 - x - 66 = 0
a=1
b= - 1
c= - 66
Now use quadratic formula
x = -b±√(b²-4ac))/(2a
= --1 + √ - 1 x - 1 - 4x1x-66 / 2x1
= 8.639.....
Now repeat with - b - & not - b +
x = -b±√(b²-4ac))/(2a
= --1 - √ - 1 x - 1 - 4x1x-66 / 2x1
= - 7.639.......
Answer:
b, a, c
Step-by-step explanation:
Median= $0 because 0,0,0,0,0,0,0,0,0,0,0.. and so forth
Mean= $1000000 because 87000000000/87000=1000000
