9514 1404 393
Answer:
(1, 1)
Step-by-step explanation:
Did you watch the video?
The y-coefficients have opposite signs and one is a multiple of the other. It is convenient to divide the second equation by 2 and add that to the first.
(5x -2y) +1/2(4x +4y) = (3) +1/2(8)
7x = 7 . . . . simplify
x = 1 . . . . . divide by 7
__
4(1) +4y = 8 . . . . substitute for x in the second equation
4y = 4 . . . . . . . . subtract 4
y = 1 . . . . . . . . . . divide by 4
The solution is (x, y) = (1, 1).
Answer: 
Step-by-step explanation:
The mean and variance of a continuous uniform distribution function with parameters m and n is given by :-
Given : 
Answer:
linear equation
Step-by-step explanation:
it's the only one that matches the description :)
Answer:
The cost of parts was $65.
Step-by-step explanation:
Let the cost of parts = x
35 + 21(3) + 1.10x = 169.50
98 + 1.10x = 169.50
71.50 = 1.10x
71.50/1.10 = 65
Answer:
Fred = 26, Natalie = 15
Step-by-step explanation:
N + F= 41 // N = 41 - F (eqn 1)
4N + F = 86 (eqn 2)
sub eqn 1 into eqn 2
4(41 - F) + F = 86
164 - 4F + F = 86
-3F = - 78
F = 26
sub F = 26 into eqn 1
N = 41 - F
N = 41 - 26
N = 15
