Answer:
x1=(7-√65)/2
x2=(7+√65)/2
Step-by-step explanation:
x^2=7x+4
x^2-7x-4=0
D=(-7)^2-4*1*(-4)=49+16=65
x1=(-(-7)-√D)/(2*1)=(7-√65)/2
x2=(-(-7)+√D)/(2*1)=(7+√65)/2
2850*24/(4*24+18)
The light bulb consumes 600 watt-hours per day.
This can be solved using the combination formula C(n,r), where n is the number of objects ( lockers) and r is the sample ( number of students).
There are 7 lockers and 4 students, so it would be written as C(7,4)
= 7! / (4!(7-4)!)
= 7*6*5*4*3*2 / ((4*3*2)*(3*2))
=5040 / (24*6)
=5040/144
=35
There are 35 different ways.
Answer:
D
Step-by-step explanation:
checked it over as well
16÷8=2 48÷8 = 6 ()()() 2/6= 1/3....btw 1/3 is your answer