Answer:
Step-by-step explanation:
x=-2, x=3
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x^2+5x+6=(-2)^2+5(-2)+6=(-2)(-2)-10+6=4-10+6=-6+6=0
x^2+5x+6=3^2+5(3)+6=9+15+6=24+6=30
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x^2-x-6=(-2)^2-(-2)-6=4+2-6=6-6=0
x^2-x-6=3^2-3-6=9-3-6=6-6=0
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Answer:
C
Step-by-step explanation:
x + 2y = 21
4x + y = 21
Multiply the second equation by -2 to get:
-8x - 2y= -42 {Add this to the original equation; y's will be eliminated}
+ x + 2y = 21
-7x = -21
x = 3
see if y = 9 works . . .
3 + 2(9) = 21 and it does
Answer:
Number of people that can be served 7 ladles = 100 people
Step-by-step explanation:
We are told that;
Initial number of ladles proposed per person = 5
Number of persons to be fed based on 5 ladles = 140 persons
Thus, amount of ladles based on that data is;
140 people x 5 ladle/1 person = 700 ladles full of soup
Now, since the cook decides to give 7 ladles full of soup to each person, the number of people that can be fed will now be;
700 ladles ÷ 7 ladles/person = 100 persons
let "a number" = x
four times a number = 4(x)
decreased by 12 = -12
4x - 12 is your answer
hope this helps