book Maths Puzzle Numerical Ability

Write 144 lb to 48 lb as a ratio in simplest form using a colon.

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i need to graph the equation x= -4 and also to change a temperature from degrees Fahrenheit to degrees Celsius, use the formula C=5/9 (F-32). Find the F and C intercepts of the lin My mom home schools me through "The American School" and they send me books and exams but no examples! So I really don't know what to do. I've tried all different things but can't