Let the unknown number be x
13x+72= -23x
13x+23x= -72
36x= -72
x= -2
Answer:
$1,800.
Step-by-step explanation:
15 x 15 = 225
225 x 8 = 1800
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Answer: 60 adults and 60 students
Step-by-step explanation:
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Answer:
Step-by-step explanation:
Gradient of a line =( y2 - y1)/x2 - x1
From the question, x1=4,y1=-1,x2=1,y2=0.
Therefore, substitute for these values in the above formula
m = 0-(-1)/1-4
= 0+1/-3
= -1/3.
Therefore, y-y1/x-x1 = -1/3
y - y1 = -1/3(x - x1)
y - (-1) = -(x-x1)/3
y+1 = - (x - 4)/3
Multiply through by 3
3y+3= -x+4
3y +x=4-3
x+3y= 1
Therefore the answer is A.
