Answer:
see explanation
Step-by-step explanation:
k=3, giving 3, 4, 5 as the three integers.
He should have used k + (k+2) + (k+4) = 4k
which gives k = 4 and the correct answer is
4, 6, 8
Answer:
X = 2, 4, 6, 7, 9
Y = 29, 33, 37, 39, 43
Step-by-step explanation:
Given a best fit line of :
y = 2x + 25
Take points X as :
X = 2, 4, 6, 7, 9
X = 2
y = 2(2) + 25 = 4 + 25 = 29
X = 4
y = 2(4) + 25 = 8 + 25 = 33
X = 6
y = 2(6) + 25 = 12 + 25 = 37
X = 7
y = 2(7) + 25 = 14 + 25 = 39
X = 9
y = 2(9) + 25 = 18 + 25 = 43
I'm pretty sure the 3rd one is right, use a calculator
2x - 3y = 7 and -3x + y = 7..multiply Equation 2 by THREE and add to Equation 1
-9x + 3y = 21...........................watch the y's disappear
-7x........ = 28
x = -4
substitute -4 instead of x in either of the ORIGINAL equations
2x - 3y = 7
2(-4) - 3y = 7
-8 -3y = 7..........add 8 to both sides
-3y = 15
y = -5
im not sure
