Answer:
42 sales plz mark as brainliest
Step-by-step explanation:
60 + 4.5(x) =250
60 + 4.5x =250
4.5x = 250-60
4.5x = 190
x = 190/4.5
x= 42 sales
In each case, you can use the second equation to create an expression for y that will substitute into the first equation. Then you can write the result in standard form and use any of several means to find the number of solutions.
System A
x² + (-x/2)² = 17
x² = 17/(5/4) = 13.6
x = ±√13.6 . . . . 2 real solutions
System B
-6x +5 = x² -7x +10
x² -x +5 = 0
The discriminant is ...
D = (-1)²-4(1)(5) = -20 . . . . 0 real solutions
System C
y = 8x +17 = -2x² +9
2x² +8x +8 = 0
2(x+2)² = 0
x = -2 . . . . 1 real solution
I would think that it would be A.... I am an expert but, only in 8th, so I would double check.
Its B.. Hope that helps :)
