There are two bottles of tomato ketchup, one weighs 720 g and costs £1.79, while the other weighs 460 g and costs £1.00. Which bottle gives better value for money? (Hint: you have to use ratios)
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Answer 1
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Answer 2
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The better value would be the one that weighs 720 g and costs $ 1.79.
1 x 8 x 9 = 72 2 x 4 x 9 = 72 3 x 4 x 6 = 72 1 x 6 x 12 = 72 1 x 4 x 18 = 72
If x and y are negative integers and x – y = 1, what is the least possible value for xy?
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x=y+1 Least possible value for y(y+1)? Well, it appears for y halfway between the roots (you know what a parabola is, don't you?). That y is -0.5, so let's calculate -0.5*0.5, which is -0.25. The least possible value is Well, not really :)) The two values must be both negative, so we can't take one of them to be 0.5! As we lower the values, however, the product grows, reaching 0 when x=0 and y=-1, and further increasing as x and y lower. Thus, we would actually take x=0 and y=-1.
Write a quadratic function in standard form with zeros 9 and -4
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2. Which of the following is the equation of a circle with the radius of 1.5 and its center at (-3,2)?A. (x+3)^2+(y-2)^2=1.5 B. (x-3)^2+(y+2)^2=1.5 C. (x+3)^2+(y-2)^2=2.25 D. (x-3)^2+(y+2)^2=2.25