Answer: option C is the correct answer
Step-by-step explanation:
The system of linear equations is
10x + 7y = 12 - - - - - - - 1
8x + 7y = 18 - - - - - - - 2
Since the coefficient of y is the same in equation 1 and equation 2, we will eliminate y by subtracting equation 2 from equation 1, it becomes
10x - 8x + 7y - 7y = 12 - 18
2x = -6
x = - 6/2 = - 3
Substituting x = - 3 into equation 1, it becomes
10×-3 + 7y = 12
-30 + 7y = 12
Let the constants be on the right hand side and the term containing y be on the left hand side. It becomes
7y = 12 + 30
7y = 42
y = 42/7
y = 6
C) (−3, 6)
Answer:
A. 18
Step-by-step explanation:
the equation :
RF×RS = PR×RQ
16×9 = PR × 8
144 = PR×8
PR = 144/8
PR = 18
Answer:
27
Step-by-step explanation:
Let x be the number,
2x - 6 = 48
2x = 48 + 6
2x = 54
x = 27
To determine if the given points are on the graph of the function, substitute the x- coordinate into the equation and if the value is equal to the y-coordinate then it is on the graph
(0, - 16 ) : f(0) = 0 + 1 = 1 ≠ - 16 → No
(- 1, - 1) : f(-1) = 16 + 1 = 17 ≠ - 1 → No
(1, 256 ) : f(1) = - 16 + 1 = - 15 ≠ 256 → No
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