Answer:
x=-4
Step-by-step explanation:
Set both equations equal to each other.
x +11=3x+19
solve for x.
X²-11x+19=-5
First collect like terms
x²-11x+19+5=0
x²-11x+24=0
Factor
(x-8)(x-3)=0
Isolate values of x
x-8=0, x=8
x-3=0, x=3
Thus
x=8,3
Let the number of bags to be purchased be x
Option Val : 250 + 1.50x
Option Sally : 100 + 4x
For Val to be the cheaper option:
250 + 1.5x < 100 + 4x
100 + 4x > 250 + 1.5x
100 + 4x - 100 > 250 + 1.5x - 100
4x > 150 + 1.5x
4x - 1.5x > 150 + 1.5x - 1.5x
2.5x > 150
x > 150 ÷ 2.5
x > 60
To make Val the cheaper option, he needs to buy more than 60 bags of lettuces.
Answer:
63 students said yes.
Step-by-step explanation:
105/5= 21
21*3= 63