The two linear equations in two variable is:
12 x + 3 y = 40
7 x - 4 y = 38
(a) For a system of equations in two Variable
a x + by = c
p x + q y = r
It will have unique solution , when
As, you can see that in the two equation Provided above
So, we can say the system of equation given here has unique solution.
(b). If point (2.5, -3.4) satisfies both the equations, then it will be solution of the system of equation, otherwise not.
1. 12 x+3 y=40
2. 7 x-4 y=38
Substituting , x= 2.5 , and y= -3.4 in equation (1) and (2),
L.H.S of Equation (1)= 1 2 × 2.5 + 3 × (-3.4)
= 30 -10.20
= 19.80≠ R.H.S that is 40.
Similarly, L H S of equation (2)= 7 × (2.5) - 4 × (-3.4)
= 17.5 +13.6
= 31.1≠R HS that is 38
So, you can Write with 100 % confidence that point (2.5, -3.4) is not a solution of this system of the equation.
Answer:
y = 97/3
Step-by-step explanation:
12y - 12 = 9y + 85
Subtract: 3y - 12 = 85
Add: 3y = 97
Divide: y = 97/3
Based on this information, what should the company do is that "<span>The expected value is $4,000.00, so the company should proceed with the campaign." The answer is B.
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Answer:
D
Step-by-step explanation:
D is the answer because in all of the measures of center the first row is smaller than the second.
The answer to this question is 22.83 but if you want it rounded its 22.84