Question

(i) For quadratic equatio
(ii) If 2x + y = 12 and 3x - y = 13, find the value of x.
ifference (d) of the A.P. 5, 1, -3,​

Answer 1

Step-by-step explanation:

Based on question number 14, the suspicion of the investigating team is supported by the sample with α = 5% if a. t < -2,145 or t > 2,145 b. t < -1,761 c.-2,145 ≤ t ≤ 2,145 d. t < 2,048 or t > 2,048 e. -2,145 < t < 2,145

Answer 2

x=5

d=-4

Step-by-step explanation:

2x+y=12

2x=12-y

x=(12-y)/2 ....1

3x-y=13

3x=13+y

3(12-y)/2=13+y

36-3y=26+2y

36-26=5y

10=5y

y=2

replacing or substituting the value of y in equation 1

x=10/2

x=5

2nd part

d=a2-a1

d=1-5= -4